| Age | Commit message (Collapse) | Author |
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Sanitize code even more to accept unsigned longs only and to not allow
polling intervals below 1 second as this is unnecessary and doesn't make
much sense anyway for polling errors.
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1391457913-881-1-git-send-email-prarit@redhat.com
Cc: Doug Thompson <dougthompson@xmission.com>
Cc: <stable@vger.kernel.org>
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If you do
echo 0 > /sys/module/edac_core/parameters/edac_mc_poll_msec
the following stack trace is output because the edac module is not
designed to poll with a timeout of zero.
WARNING: CPU: 12 PID: 0 at lib/list_debug.c:33 __list_add+0xac/0xc0()
list_add corruption. prev->next should be next (ffff8808291dd1b8), but was (null). (prev=ffff8808286fe3f8).
Modules linked in: sg nfsv3 rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache cfg80211 rfkill x86_pkg_temp_thermal coretemp kvm_intel kvm ixgbe e1000e crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd iTCO_wdt ptp sb_edac iTCO_vendor_support pps_core mdio ipmi_devintf edac_core ioatdma microcode shpchp lpc_ich pcspkr i2c_i801 dca mfd_core ipmi_si wmi ipmi_msghandler nfsd auth_rpcgss nfs_acl lockd sunrpc xfs libcrc32c sd_mod sr_mod cdrom crc_t10dif crct10dif_common mgag200 syscopyarea sysfillrect sysimgblt isci i2c_algo_bit drm_kms_helper ttm drm libsas ahci libahci scsi_transport_sas libata i2c_core dm_mirror dm_region_hash dm_log dm_mod
CPU: 12 PID: 0 Comm: swapper/12 Not tainted 3.13.0+ #1
Hardware name: Intel Corporation LH Pass ........../SVRBD-ROW_T, BIOS SE5C600.86B.01.08.0003.022620131521 02/26/2013
Call Trace:
<IRQ>
__list_add+0xac/0xc0
__internal_add_timer+0xab/0x130
internal_add_timer+0x17/0x40
mod_timer_pinned+0xca/0x170
intel_pstate_timer_func+0x28a/0x380
call_timer_fn+0x36/0x100
run_timer_softirq+0x1ff/0x2f0
__do_softirq+0xf5/0x2e0
irq_exit+0x10d/0x120
smp_apic_timer_interrupt+0x45/0x60
apic_timer_interrupt+0x6d/0x80
<EOI>
cpuidle_idle_call+0xb9/0x1f0
arch_cpu_idle+0xe/0x30
cpu_startup_entry+0x9e/0x240
start_secondary+0x1e4/0x290
kernel BUG at kernel/timer.c:1084!
invalid opcode: 0000 [#1] SMP
Modules linked in: sg nfsv3 rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache cfg80211 rfkill x86_pkg_temp_thermal coretemp kvm_intel kvm ixgbe e1000e crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd iTCO_wdt ptp sb_edac iTCO_vendor_support pps_core mdio ipmi_devintf edac_core ioatdma microcode shpchp lpc_ich pcspkr i2c_i801 dca mfd_core ipmi_si wmi ipmi_msghandler nfsd auth_rpcgss nfs_acl lockd sunrpc xfs libcrc32c sd_mod sr_mod cdrom crc_t10dif crct10dif_common mgag200 syscopyarea sysfillrect sysimgblt isci i2c_algo_bit drm_kms_helper ttm drm libsas ahci libahci scsi_transport_sas libata i2c_core dm_mirror dm_region_hash dm_log dm_mod
CPU: 12 PID: 0 Comm: swapper/12 Tainted: G W 3.13.0+ #1
Hardware name: Intel Corporation LH Pass ........../SVRBD-ROW_T, BIOS SE5C600.86B.01.08.0003.022620131521 02/26/2013
Call Trace:
<IRQ>
run_timer_softirq+0x245/0x2f0
__do_softirq+0xf5/0x2e0
irq_exit+0x10d/0x120
smp_apic_timer_interrupt+0x45/0x60
apic_timer_interrupt+0x6d/0x80
<EOI>
cpuidle_idle_call+0xb9/0x1f0
arch_cpu_idle+0xe/0x30
cpu_startup_entry+0x9e/0x240
start_secondary+0x1e4/0x290
RIP cascade+0x93/0xa0
WARNING: CPU: 36 PID: 1154 at kernel/workqueue.c:1461 __queue_delayed_work+0xed/0x1a0()
Modules linked in: sg nfsv3 rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache cfg80211 rfkill x86_pkg_temp_thermal coretemp kvm_intel kvm ixgbe e1000e crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd iTCO_wdt ptp sb_edac iTCO_vendor_support pps_core mdio ipmi_devintf edac_core ioatdma microcode shpchp lpc_ich pcspkr i2c_i801 dca mfd_core ipmi_si wmi ipmi_msghandler nfsd auth_rpcgss nfs_acl lockd sunrpc xfs libcrc32c sd_mod sr_mod cdrom crc_t10dif crct10dif_common mgag200 syscopyarea sysfillrect sysimgblt isci i2c_algo_bit drm_kms_helper ttm drm libsas ahci libahci scsi_transport_sas libata i2c_core dm_mirror dm_region_hash dm_log dm_mod
CPU: 36 PID: 1154 Comm: kworker/u481:3 Tainted: G W 3.13.0+ #1
Hardware name: Intel Corporation LH Pass ........../SVRBD-ROW_T, BIOS SE5C600.86B.01.08.0003.022620131521 02/26/2013
Workqueue: edac-poller edac_mc_workq_function [edac_core]
Call Trace:
dump_stack+0x45/0x56
warn_slowpath_common+0x7d/0xa0
warn_slowpath_null+0x1a/0x20
__queue_delayed_work+0xed/0x1a0
queue_delayed_work_on+0x27/0x50
edac_mc_workq_function+0x72/0xa0 [edac_core]
process_one_work+0x17b/0x460
worker_thread+0x11b/0x400
kthread+0xd2/0xf0
ret_from_fork+0x7c/0xb0
This patch adds a range check in the edac_mc_poll_msec code to check for 0.
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Cc: Doug Thompson <dougthompson@xmission.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This patch marks the function edac_create_debug_nodes() as static
because it is not used outside of edac_mc_sysfs.c.
Thus, it also eliminates the following warning:
drivers/edac/edac_mc_sysfs.c:917:5: warning: no previous prototype for ‘edac_create_debug_nodes’ [-Wmissing-prototypes]
Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Link: http://lkml.kernel.org/r/a1c863b08c0d6f67d03280cf908c771bf26a3239.1387029387.git.rashika.kheria@gmail.com
Signed-off-by: Borislav Petkov <bp@suse.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp into x86/ras
Pull RAS/EDAC updates from Boris Petkov:
"An amd64_edac fix for single channel configurations + trivial cleanups
courtesy of Jingoo Han."
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The usage of strict_strtol() is not preferred, because strict_strtol()
is obsolete. Thus, kstrtol() should be used.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
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Fix the following:
BUG: key ffff88043bdd0330 not in .data!
------------[ cut here ]------------
WARNING: at kernel/lockdep.c:2987 lockdep_init_map+0x565/0x5a0()
DEBUG_LOCKS_WARN_ON(1)
Modules linked in: glue_helper sb_edac(+) edac_core snd acpi_cpufreq lrw gf128mul ablk_helper iTCO_wdt evdev i2c_i801 dcdbas button cryptd pcspkr iTCO_vendor_support usb_common lpc_ich mfd_core soundcore mperf processor microcode
CPU: 2 PID: 599 Comm: modprobe Not tainted 3.10.0 #1
Hardware name: Dell Inc. Precision T3600/0PTTT9, BIOS A08 01/24/2013
0000000000000009 ffff880439a1d920 ffffffff8160a9a9 ffff880439a1d958
ffffffff8103d9e0 ffff88043af4a510 ffffffff81a16e11 0000000000000000
ffff88043bdd0330 0000000000000000 ffff880439a1d9b8 ffffffff8103dacc
Call Trace:
dump_stack
warn_slowpath_common
warn_slowpath_fmt
lockdep_init_map
? trace_hardirqs_on_caller
? trace_hardirqs_on
debug_mutex_init
__mutex_init
bus_register
edac_create_sysfs_mci_device
edac_mc_add_mc
sbridge_probe
pci_device_probe
driver_probe_device
__driver_attach
? driver_probe_device
bus_for_each_dev
driver_attach
bus_add_driver
driver_register
__pci_register_driver
? 0xffffffffa0010fff
sbridge_init
? 0xffffffffa0010fff
do_one_initcall
load_module
? unset_module_init_ro_nx
SyS_init_module
tracesys
---[ end trace d24a70b0d3ddf733 ]---
EDAC MC0: Giving out device to 'sbridge_edac.c' 'Sandy Bridge Socket#0': DEV 0000:3f:0e.0
EDAC sbridge: Driver loaded.
What happens is that bus_register needs a statically allocated lock_key
because the last is handed in to lockdep. However, struct mem_ctl_info
embeds struct bus_type (the whole struct, not a pointer to it) and the
whole thing gets dynamically allocated.
Fix this by using a statically allocated struct bus_type for the MC bus.
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Markus Trippelsdorf <markus@trippelsdorf.de>
Cc: stable@kernel.org # v3.10
Signed-off-by: Tony Luck <tony.luck@intel.com>
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The usage of strict_strtoul() is not preferred, because strict_strtoul()
is obsolete. Thus, kstrtoul() should be used.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
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I get the following warning on boot:
------------[ cut here ]------------
WARNING: at drivers/base/core.c:575 device_create_file+0x9a/0xa0()
Hardware name: -[8737R2A]-
Write permission without 'store'
...
</snip>
Drilling down, this is related to dynamic channel ce_count attribute
files sporting a S_IWUSR mode without a ->store() function. Looking
around, it appears that they aren't supposed to have a ->store()
function. So remove the bogus write permission to get rid of the
warning.
Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Cc: <stable@vger.kernel.org> # 3.[89]
[ shorten commit message ]
Signed-off-by: Borislav Petkov <bp@suse.de>
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Those should be const ptr to a const string, fix them.
Signed-off-by: Borislav Petkov <bp@suse.de>
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Both mci.mem_is_per_rank and mci.csbased denote the same thing: the
memory controller is csrows based. Merge both fields into one.
There's no need for the driver to actually fill it, as the core detects
it by checking if one of the layers has the csrows type as part of the
memory hierarchy:
if (layers[i].type == EDAC_MC_LAYER_CHIP_SELECT)
per_rank = true;
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
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We were filling the csrow size with a wrong value. 16a528ee3975 ("EDAC:
Fix csrow size reported in sysfs") tried to address the issue. It fixed
the report with the old API but not with the new one. Correct it for the
new API too.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
[ make it a per-csrow accounting regardless of ->channel_count ]
Signed-off-by: Borislav Petkov <bp@suse.de>
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Fixes lots of sparse warnings here.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
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It is hard to find what's wrong without a proper error
report. Improve it, in debug mode.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Currently, sdram_scrub_rate sysfs node is created even if the device
doesn't support get/set the scub rate. Change the logic to only
create this device node when the operation is supported.
Reported-by: Felipe Balbi <balbi@ti.com>
Acked-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Use device_unregister to replace put_device + device_del for
cleanup, and fix the potential use after free.
Signed-off-by: Lans Zhang <jia.zhang@windriver.com>
Signed-off-by: Borislav Petkov <bp@alien8.de>
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This patch fixes use-after-free and double-free bugs in
edac_mc_sysfs_exit(). mci_pdev has single reference and put_device()
calls mc_attr_release() which calls kfree(). The following
device_del() works with already released memory. An another kfree() in
edac_mc_sysfs_exit() releses the same memory again. Great.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: stable@vger.kernel.org # 3.[67]
Cc: Denis Kirjanov <kirjanov@gmail.com>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Link: http://lkml.kernel.org/r/20121214110310.11019.21098.stgit@zurg
Signed-off-by: Borislav Petkov <bp@alien8.de>
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Make sure proper deregistration happens on all error paths in
edac_mc_sysfs_init.
Signed-off-by: Denis Kirjanov <kirjanov@gmail.com>
[ Boris: cleanup and concretize commit message ]
Signed-off-by: Borislav Petkov <bp@alien8.de>
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This removes an open coded simple_open() function and replaces file
operations references to the function with simple_open() instead.
dpatch engine is used to auto generate this patch.
(https://github.com/weiyj/dpatch)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
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This is the complement to previous commit "EDAC: Fix csrow size
reported in sysfs". This fixes the memory controller size reporting on
csrow-based memory controllers. The csrow size is already combined for
both channels. Without this patch memory size is reported doubled.
Signed-off-by: Josh Hunt <johunt@akamai.com>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
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On csrow-based memory controllers, we combine the csrow size from both
channels and there's no need to do that again in csrow_size_show which
leads to double the size of a csrow.
Fix it.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
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Initialize the mem_ctl_info descriptor of a csrow properly.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
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In order to test if the error counters are properly incremented,
add a way to specify how many errors were generated by a trace.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Create a single, top-level "edac" directory for debugfs. An "mc[0-N]"
directory is then created for each memory controller. Individual drivers
can create additional entries such as h/w error injection control.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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In order to avoid loosing error events, it is desirable to group
error events together and generate a single trace for several identical
errors.
The trace API already allows reporting multiple errors. Change the
handle_error function to also allow that.
The changes at the drivers were made by this small script:
$file .=$_ while (<>);
$file =~ s/(edac_mc_handle_error)\s*\(([^\,]+)\,([^\,]+)\,/$1($2,$3, 1,/g;
print $file;
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Remove the arch-dependent parameter, as it were not used,
as the MCE tracepoint weren't implemented. It probably doesn't
make sense to have an MCE-specific tracepoint, as this will
cost more bytes at the tracepoint, and tracepoint is not free.
The changes at the EDAC drivers were done by this small perl script:
$file .=$_ while (<>);
$file =~ s/(edac_mc_handle_error)\s*\(([^\;]+)\,([^\,\)]+)\s*\)/$1($2)/g;
print $file;
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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The edac_mc_alloc() routine allocates one dimm_info device for all
possible memories, including the non-filled ones. The debug messages
there are somewhat confusing. So, cleans them, by moving the code
that prints the memory location to edac_mc, and using it on both
edac_mc_sysfs and edac_mc.
Also, only dumps information when DIMM/ranks are actually
filled.
After this patch, a dimm-based memory controller will print the debug
info as:
[ 1011.380027] EDAC DEBUG: edac_mc_dump_csrow: csrow->csrow_idx = 0
[ 1011.380029] EDAC DEBUG: edac_mc_dump_csrow: csrow = ffff8801169be000
[ 1011.380031] EDAC DEBUG: edac_mc_dump_csrow: csrow->first_page = 0x0
[ 1011.380032] EDAC DEBUG: edac_mc_dump_csrow: csrow->last_page = 0x0
[ 1011.380034] EDAC DEBUG: edac_mc_dump_csrow: csrow->page_mask = 0x0
[ 1011.380035] EDAC DEBUG: edac_mc_dump_csrow: csrow->nr_channels = 3
[ 1011.380037] EDAC DEBUG: edac_mc_dump_csrow: csrow->channels = ffff8801149c2840
[ 1011.380039] EDAC DEBUG: edac_mc_dump_csrow: csrow->mci = ffff880117426000
[ 1011.380041] EDAC DEBUG: edac_mc_dump_channel: channel->chan_idx = 0
[ 1011.380042] EDAC DEBUG: edac_mc_dump_channel: channel = ffff8801149c2860
[ 1011.380044] EDAC DEBUG: edac_mc_dump_channel: channel->csrow = ffff8801169be000
[ 1011.380046] EDAC DEBUG: edac_mc_dump_channel: channel->dimm = ffff88010fe90400
...
[ 1011.380095] EDAC DEBUG: edac_mc_dump_dimm: dimm0: channel 0 slot 0 mapped as virtual row 0, chan 0
[ 1011.380097] EDAC DEBUG: edac_mc_dump_dimm: dimm = ffff88010fe90400
[ 1011.380099] EDAC DEBUG: edac_mc_dump_dimm: dimm->label = 'CPU#0Channel#0_DIMM#0'
[ 1011.380101] EDAC DEBUG: edac_mc_dump_dimm: dimm->nr_pages = 0x40000
[ 1011.380103] EDAC DEBUG: edac_mc_dump_dimm: dimm->grain = 8
[ 1011.380104] EDAC DEBUG: edac_mc_dump_dimm: dimm->nr_pages = 0x40000
...
(a rank-based memory controller would print, instead of "dimm?", "rank?"
on the above debug info)
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Use a more common debugging style.
Remove __FILE__ uses, add missing newlines,
coalesce formats and align arguments.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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The debug macro already adds that. Most of the work here was
made by this small script:
$f .=$_ while (<>);
$f =~ s/(debugf[0-9]\s*\(\s*)__FILE__\s*": /\1"/g;
$f =~ s/(debugf[0-9]\s*\(\s*)__FILE__\s*/\1/g;
$f =~ s/(debugf[0-9]\s*\(\s*)__FILE__\s*"MC: /\1"/g;
$f =~ s/(debugf[0-9]\s*\(\")\%s[\:\,\(\)]*\s*([^\"]*\s*[^\)]+)__func__\s*\,\s*/\1\2/g;
$f =~ s/(debugf[0-9]\s*\(\")\%s[\:\,\(\)]*\s*([^\"]*\s*[^\)]+),\s*__func__\s*\)/\1\2)/g;
$f =~ s/(debugf[0-9]\s*\(\"MC\:\s*)\%s[\:\,\(\)]*\s*([^\"]*\s*[^\)]+)__func__\s*\,\s*/\1\2/g;
$f =~ s/(debugf[0-9]\s*\(\"MC\:\s*)\%s[\:\,\(\)]*\s*([^\"]*\s*[^\)]+),\s*__func__\s*\)/\1\2)/g;
$f =~ s/\"MC\: \\n\"/"MC:\\n"/g;
print $f;
After running the script, manual cleanups were done to fix it the remaining
places.
While here, removed the __LINE__ on most places, as it doesn't actually give
useful info on most places.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Kernel kobjects have rigid rules: each container object should be
dynamically allocated, and can't be allocated into a single kmalloc.
EDAC never obeyed this rule: it has a single malloc function that
allocates all needed data into a single kzalloc.
As this is not accepted anymore, change the allocation schema of the
EDAC *_info structs to enforce this Kernel standard.
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Cc: Aristeu Rozanski <arozansk@redhat.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Cc: Greg K H <gregkh@linuxfoundation.org>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: Mark Gross <mark.gross@intel.com>
Cc: Tim Small <tim@buttersideup.com>
Cc: Ranganathan Desikan <ravi@jetztechnologies.com>
Cc: "Arvind R." <arvino55@gmail.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Egor Martovetsky <egor@pasemi.com>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Hitoshi Mitake <h.mitake@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Shaohui Xie <Shaohui.Xie@freescale.com>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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This patch actually fixes a bug with the legacy API, where, at the
same csrow, some channels may have different DIMMs. This can happen
on FB-DIMM/RAMBUS and modern Intel controllers.
This is the case, for example, of Nehalem machines:
$ ./edac-ctl --layout
+-----------------------------------+
| mc0 |
| channel0 | channel1 | channel2 |
-------+-----------------------------------+
slot2: | 0 MB | 0 MB | 0 MB |
slot1: | 1024 MB | 0 MB | 0 MB |
slot0: | 1024 MB | 1024 MB | 1024 MB |
-------+-----------------------------------+
Before this patch, non-filled memories were shown. Now, only what's
filled is there:
grep . /sys/devices/system/edac/mc/mc0/csrow*/ch?*
/sys/devices/system/edac/mc/mc0/csrow0/ch0_ce_count:0
/sys/devices/system/edac/mc/mc0/csrow0/ch0_dimm_label:CPU#0Channel#0_DIMM#0
/sys/devices/system/edac/mc/mc0/csrow0/ch1_ce_count:0
/sys/devices/system/edac/mc/mc0/csrow0/ch1_dimm_label:CPU#0Channel#0_DIMM#1
/sys/devices/system/edac/mc/mc0/csrow1/ch0_ce_count:0
/sys/devices/system/edac/mc/mc0/csrow1/ch0_dimm_label:CPU#0Channel#1_DIMM#0
/sys/devices/system/edac/mc/mc0/csrow2/ch0_ce_count:0
/sys/devices/system/edac/mc/mc0/csrow2/ch0_dimm_label:CPU#0Channel#2_DIMM#0
Thanks-to: Aristeu Rozanski Filho <arozansk@redhat.com>
Reviewed-by: Aristeu Rozanski <arozansk@redhat.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
Sometimes, it is useful to have a mechanism that generates fake
errors, in order to test the EDAC core code, and the userspace
tools.
Provide such mechanism by adding a few debugfs nodes.
Reviewed-by: Aristeu Rozanski <arozansk@redhat.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
The userspace tools need to know what's the maximum location on each
system, as it helps to create nice maps showing how the memory was
filled at the system.
Reviewed-by: Aristeu Rozanski <arozansk@redhat.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
The old EDAC API is broken. It only works fine for systems manufatured
before 2005 and for AMD 64. The reason is that it forces all memory
controller drivers to discover rank info.
Also, it doesn't allow grouping the several ranks into a DIMM.
So, what almost all modern drivers do is to create a fake virtual-rank
information, and use it to cheat the EDAC core to accept the driver.
While this works if the user has enough time to discover what DIMM slot
corresponds to each "virtual-rank" information, it prevents EDAC usage
for users with less available time. It also makes life hard for vendors
that may want to provide a table with their motherboards to the userspace
tool (edac-utils) as each driver has its own logic for the virtual
mapping.
So, the old API should be removed, in favor of a more flexible API that
allows newer drivers to not lie to the EDAC core.
Reviewed-by: Aristeu Rozanski <arozansk@redhat.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: Randy Dunlap <rdunlap@xenotime.net>
Cc: Josh Boyer <jwboyer@redhat.com>
Cc: Hui Wang <jason77.wang@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
The EDAC subsystem uses the old struct sysdev approach,
creating all nodes using the raw sysfs API. This is bad,
as the API is deprecated.
As we'll be changing the EDAC API, let's first port the existing
code to struct device.
There's one drawback on this patch: driver-specific sysfs
nodes, used by mpc85xx_edac, amd64_edac and i7core_edac
won't be created anymore. While it would be possible to
also port the device-specific code, that would mix kobj with
struct device, with is not recommended. Also, it is easier and nicer
to move the code to the drivers, instead, as the core can get rid
of some complex logic that just emulates what the device_add()
and device_create_file() already does.
The next patches will convert the driver-specific code to use
the device-specific calls. Then, the remaining bits of the old
sysfs API will be removed.
NOTE: a per-MC bus is required, otherwise devices with more than
one memory controller will hit a bug like the one below:
[ 819.094946] EDAC DEBUG: find_mci_by_dev: find_mci_by_dev()
[ 819.094948] EDAC DEBUG: edac_create_sysfs_mci_device: edac_create_sysfs_mci_device() idx=1
[ 819.094952] EDAC DEBUG: edac_create_sysfs_mci_device: edac_create_sysfs_mci_device(): creating device mc1
[ 819.094967] EDAC DEBUG: edac_create_sysfs_mci_device: edac_create_sysfs_mci_device creating dimm0, located at channel 0 slot 0
[ 819.094984] ------------[ cut here ]------------
[ 819.100142] WARNING: at fs/sysfs/dir.c:481 sysfs_add_one+0xc1/0xf0()
[ 819.107282] Hardware name: S2600CP
[ 819.111078] sysfs: cannot create duplicate filename '/bus/edac/devices/dimm0'
[ 819.119062] Modules linked in: sb_edac(+) edac_core ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle iptable_filter ip_tables bridge stp llc sunrpc binfmt_misc dm_mirror dm_region_hash dm_log vhost_net macvtap macvlan tun kvm microcode pcspkr iTCO_wdt iTCO_vendor_support igb i2c_i801 i2c_core sg ioatdma dca sr_mod cdrom sd_mod crc_t10dif ahci libahci isci libsas libata scsi_transport_sas scsi_mod wmi dm_mod [last unloaded: scsi_wait_scan]
[ 819.175748] Pid: 10902, comm: modprobe Not tainted 3.3.0-0.11.el7.v12.2.x86_64 #1
[ 819.184113] Call Trace:
[ 819.186868] [<ffffffff8105adaf>] warn_slowpath_common+0x7f/0xc0
[ 819.193573] [<ffffffff8105aea6>] warn_slowpath_fmt+0x46/0x50
[ 819.200000] [<ffffffff811f53d1>] sysfs_add_one+0xc1/0xf0
[ 819.206025] [<ffffffff811f5cf5>] sysfs_do_create_link+0x135/0x220
[ 819.212944] [<ffffffff811f7023>] ? sysfs_create_group+0x13/0x20
[ 819.219656] [<ffffffff811f5df3>] sysfs_create_link+0x13/0x20
[ 819.226109] [<ffffffff813b04f6>] bus_add_device+0xe6/0x1b0
[ 819.232350] [<ffffffff813ae7cb>] device_add+0x2db/0x460
[ 819.238300] [<ffffffffa0325634>] edac_create_dimm_object+0x84/0xf0 [edac_core]
[ 819.246460] [<ffffffffa0325e18>] edac_create_sysfs_mci_device+0xe8/0x290 [edac_core]
[ 819.255215] [<ffffffffa0322e2a>] edac_mc_add_mc+0x5a/0x2c0 [edac_core]
[ 819.262611] [<ffffffffa03412df>] sbridge_register_mci+0x1bc/0x279 [sb_edac]
[ 819.270493] [<ffffffffa03417a3>] sbridge_probe+0xef/0x175 [sb_edac]
[ 819.277630] [<ffffffff813ba4e8>] ? pm_runtime_enable+0x58/0x90
[ 819.284268] [<ffffffff812f430c>] local_pci_probe+0x5c/0xd0
[ 819.290508] [<ffffffff812f5ba1>] __pci_device_probe+0xf1/0x100
[ 819.297117] [<ffffffff812f5bea>] pci_device_probe+0x3a/0x60
[ 819.303457] [<ffffffff813b1003>] really_probe+0x73/0x270
[ 819.309496] [<ffffffff813b138e>] driver_probe_device+0x4e/0xb0
[ 819.316104] [<ffffffff813b149b>] __driver_attach+0xab/0xb0
[ 819.322337] [<ffffffff813b13f0>] ? driver_probe_device+0xb0/0xb0
[ 819.329151] [<ffffffff813af5d6>] bus_for_each_dev+0x56/0x90
[ 819.335489] [<ffffffff813b0d7e>] driver_attach+0x1e/0x20
[ 819.341534] [<ffffffff813b0980>] bus_add_driver+0x1b0/0x2a0
[ 819.347884] [<ffffffffa0347000>] ? 0xffffffffa0346fff
[ 819.353641] [<ffffffff813b19f6>] driver_register+0x76/0x140
[ 819.359980] [<ffffffff8159f18b>] ? printk+0x51/0x53
[ 819.365524] [<ffffffffa0347000>] ? 0xffffffffa0346fff
[ 819.371291] [<ffffffff812f5896>] __pci_register_driver+0x56/0xd0
[ 819.378096] [<ffffffffa0347054>] sbridge_init+0x54/0x1000 [sb_edac]
[ 819.385231] [<ffffffff8100203f>] do_one_initcall+0x3f/0x170
[ 819.391577] [<ffffffff810bcd2e>] sys_init_module+0xbe/0x230
[ 819.397926] [<ffffffff815bb529>] system_call_fastpath+0x16/0x1b
[ 819.404633] ---[ end trace 1654fdd39556689f ]---
This happens because the bus is not being properly initialized.
Instead of putting the memory sub-devices inside the memory controller,
it is putting everything under the same directory:
$ tree /sys/bus/edac/
/sys/bus/edac/
├── devices
│ ├── all_channel_counts -> ../../../devices/system/edac/mc/mc0/all_channel_counts
│ ├── csrow0 -> ../../../devices/system/edac/mc/mc0/csrow0
│ ├── csrow1 -> ../../../devices/system/edac/mc/mc0/csrow1
│ ├── csrow2 -> ../../../devices/system/edac/mc/mc0/csrow2
│ ├── dimm0 -> ../../../devices/system/edac/mc/mc0/dimm0
│ ├── dimm1 -> ../../../devices/system/edac/mc/mc0/dimm1
│ ├── dimm3 -> ../../../devices/system/edac/mc/mc0/dimm3
│ ├── dimm6 -> ../../../devices/system/edac/mc/mc0/dimm6
│ ├── inject_addrmatch -> ../../../devices/system/edac/mc/mc0/inject_addrmatch
│ ├── mc -> ../../../devices/system/edac/mc
│ └── mc0 -> ../../../devices/system/edac/mc/mc0
├── drivers
├── drivers_autoprobe
├── drivers_probe
└── uevent
On a multi-memory controller system, the names "csrow%d" and "dimm%d"
should be under "mc%d", and not at the main hierarchy level.
So, we need to create a per-MC bus, in order to have its own namespace.
Reviewed-by: Aristeu Rozanski <arozansk@redhat.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Cc: Greg K H <gregkh@linuxfoundation.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
As EDAC doesn't use struct device itself, it created a parent dev
pointer called as "pdev". Now that we'll be converting it to use
struct device, instead of struct devsys, this needs to be fixed.
No functional changes.
Reviewed-by: Aristeu Rozanski <arozansk@redhat.com>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: Mark Gross <mark.gross@intel.com>
Cc: Jason Uhlenkott <juhlenko@akamai.com>
Cc: Tim Small <tim@buttersideup.com>
Cc: Ranganathan Desikan <ravi@jetztechnologies.com>
Cc: "Arvind R." <arvino55@gmail.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Egor Martovetsky <egor@pasemi.com>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Joe Perches <joe@perches.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Hitoshi Mitake <h.mitake@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Niklas Söderlund" <niklas.soderlund@ericsson.com>
Cc: Shaohui Xie <Shaohui.Xie@freescale.com>
Cc: Josh Boyer <jwboyer@gmail.com>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
While userspace doesn't fill the dimm labels, add there the dimm location,
as described by the used memory model. This could eventually match what
is described at the dmidecode, making easier for people to identify the
memory.
For example, on an Intel motherboard where the DMI table is reliable,
the first memory stick is described as:
Memory Device
Array Handle: 0x0029
Error Information Handle: Not Provided
Total Width: 64 bits
Data Width: 64 bits
Size: 2048 MB
Form Factor: DIMM
Set: 1
Locator: A1_DIMM0
Bank Locator: A1_Node0_Channel0_Dimm0
Type: <OUT OF SPEC>
Type Detail: Synchronous
Speed: 800 MHz
Manufacturer: A1_Manufacturer0
Serial Number: A1_SerNum0
Asset Tag: A1_AssetTagNum0
Part Number: A1_PartNum0
The memory named as "A1_DIMM0" is physically located at the first
memory controller (node 0), at channel 0, dimm slot 0.
After this patch, the memory label will be filled with:
/sys/devices/system/edac/mc/csrow0/ch0_dimm_label:mc#0channel#0slot#0
And (after the new EDAC API patches) as:
/sys/devices/system/edac/mc/mc0/dimm0/dimm_label:mc#0channel#0slot#0
So, even if the memory label is not initialized on userspace, an useful
information with the error location is filled there, expecially since
several systems/motherboards are provided with enough info to map from
channel/slot (or branch/channel/slot) into the DIMM label. So, letting the
EDAC core fill it by default is a good thing.
It should noticed that, as the label filling happens at the
edac_mc_alloc(), drivers can override it to better describe the memories
(and some actually do it).
Cc: Aristeu Rozanski <arozansk@redhat.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
The number of pages is a dimm property. Move it to the dimm struct.
After this change, it is possible to add sysfs nodes for the DIMM's that
will properly represent the DIMM stick properties, including its size.
A TODO fix here is to properly represent dual-rank/quad-rank DIMMs when
the memory controller represents the memory via chip select rows.
Reviewed-by: Aristeu Rozanski <arozansk@redhat.com>
Acked-by: Borislav Petkov <borislav.petkov@amd.com>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Cc: Mark Gross <mark.gross@intel.com>
Cc: Jason Uhlenkott <juhlenko@akamai.com>
Cc: Tim Small <tim@buttersideup.com>
Cc: Ranganathan Desikan <ravi@jetztechnologies.com>
Cc: "Arvind R." <arvino55@gmail.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Egor Martovetsky <egor@pasemi.com>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Joe Perches <joe@perches.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Hitoshi Mitake <h.mitake@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Niklas Söderlund" <niklas.soderlund@ericsson.com>
Cc: Shaohui Xie <Shaohui.Xie@freescale.com>
Cc: Josh Boyer <jwboyer@gmail.com>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
On systems based on chip select rows, all channels need to use memories
with the same properties, otherwise the memories on channels A and B
won't be recognized.
However, such assumption is not true for all types of memory
controllers.
Controllers for FB-DIMM's don't have such requirements.
Also, modern Intel controllers seem to be capable of handling such
differences.
So, we need to get rid of storing the DIMM information into a per-csrow
data, storing it, instead at the right place.
The first step is to move grain, mtype, dtype and edac_mode to the
per-dimm struct.
Reviewed-by: Aristeu Rozanski <arozansk@redhat.com>
Reviewed-by: Borislav Petkov <borislav.petkov@amd.com>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: Mark Gross <mark.gross@intel.com>
Cc: Jason Uhlenkott <juhlenko@akamai.com>
Cc: Tim Small <tim@buttersideup.com>
Cc: Ranganathan Desikan <ravi@jetztechnologies.com>
Cc: "Arvind R." <arvino55@gmail.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Egor Martovetsky <egor@pasemi.com>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Joe Perches <joe@perches.com>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Hitoshi Mitake <h.mitake@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: James Bottomley <James.Bottomley@parallels.com>
Cc: "Niklas Söderlund" <niklas.soderlund@ericsson.com>
Cc: Shaohui Xie <Shaohui.Xie@freescale.com>
Cc: Josh Boyer <jwboyer@gmail.com>
Cc: Mike Williams <mike@mikebwilliams.com>
Cc: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
The way a DIMM is currently represented implies that they're
linked into a per-csrow struct. However, some drivers don't see
csrows, as they're ridden behind some chip like the AMB's
on FBDIMM's, for example.
This forced drivers to fake^Wvirtualize a csrow struct, and to create
a mess under csrow/channel original's concept.
Move the DIMM labels into a per-DIMM struct, and add there
the real location of the socket, in terms of csrow/channel.
Latter patches will modify the location to properly represent the
memory architecture.
All other drivers will use a per-csrow type of location.
Some of those drivers will require a latter conversion, as
they also fake the csrows internally.
TODO: While this patch doesn't change the existing behavior, on
csrows-based memory controllers, a csrow/channel pair points to a memory
rank. There's a known bug at the EDAC core that allows having different
labels for the same DIMM, if it has more than one rank. A latter patch
is need to merge the several ranks for a DIMM into the same dimm_info
struct, in order to avoid having different labels for the same DIMM.
The edac_mc_alloc() will now contain a per-dimm initialization loop that
will be changed by latter patches in order to match other types of
memory architectures.
Reviewed-by: Aristeu Rozanski <arozansk@redhat.com>
Reviewed-by: Borislav Petkov <borislav.petkov@amd.com>
Cc: Doug Thompson <norsk5@yahoo.com>
Cc: Ranganathan Desikan <ravi@jetztechnologies.com>
Cc: "Arvind R." <arvino55@gmail.com>
Cc: "Niklas Söderlund" <niklas.soderlund@ericsson.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
The original scrub rate API definition states that if scrub rate
accessors are not implemented, a negative value (-1) should be written
to the sysfs file (/sys/devices/system/edac/mc/mc<N>/sdram_scrub_rate,
where N is the memory controller number on the system). This is
counter-intuitive and awkward at the very least because, when setting
the scrub rate, userspace has to write to sysfs and then read it back to
check error status of the operation.
As Tony notes, best it would be to not have the sdram_scrub_rate in
sysfs if scrub rate support is not implemented. It is too late about
that and a bunch of drivers on a bunch of arches would need to be
changed and tested which is not a trivial task ATM.
Instead, settle for the next best thing of returning -ENODEV when
implementation is missing and -EINVAL when there was an error
encountered while setting the scrub rate.
Reported-by: Han Pingtian <phan@redhat.com>
Cc: Tony Luck <tony.luck@intel.com>
Link: http://lkml.kernel.org/r/20110916105856.GA13253@hpt.nay.redhat.com
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
|
|
After all sysdev classes are ported to regular driver core entities, the
sysdev implementation will be entirely removed from the kernel.
Cc: Doug Thompson <dougthompson@xmission.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
|
|
This patch removes superfluous debugging output in the sysfs scrub rate
handler. It also consolidates the error handling in the scrub rate
accessors.
Signed-off-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
|
|
Fixes generated by 'codespell' and manually reviewed.
Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
|
|
Raise the debug level of these routines so that their output get issued
out only when the highest debug level is selected. Otherwise, don't
pollute driver debug output.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
|
|
Make the ->{get|set}_sdram_scrub_rate return the actual scrub rate
bandwidth it succeeded setting and remove superfluous arg pointer used
for that. A negative value returned still means that an error occurred
while setting the scrubrate. Document this for future reference.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/i7core
* 'linux_next' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/i7core: (34 commits)
i7core_edac: return -ENODEV when devices were already probed
i7core_edac: properly terminate pci_dev_table
i7core_edac: Avoid PCI refcount to reach zero on successive load/reload
i7core_edac: Fix refcount error at PCI devices
i7core_edac: it is safe to i7core_unregister_mci() when mci=NULL
i7core_edac: Fix an oops at i7core probe
i7core_edac: Remove unused member channels in i7core_pvt
i7core_edac: Remove unused arg csrow from get_dimm_config
i7core_edac: Reduce args of i7core_register_mci
i7core_edac: Introduce i7core_unregister_mci
i7core_edac: Use saved pointers
i7core_edac: Check probe counter in i7core_remove
i7core_edac: Call pci_dev_put() when alloc_i7core_dev() failed
i7core_edac: Fix error path of i7core_register_mci
i7core_edac: Fix order of lines in i7core_register_mci
i7core_edac: Always do get/put for all devices
i7core_edac: Introduce i7core_pci_ctl_create/release
i7core_edac: Introduce free_i7core_dev
i7core_edac: Introduce alloc_i7core_dev
i7core_edac: Reduce args of i7core_get_onedevice
...
|
|
This is a nasty bug. Since kobject count will be reduced by zero by
edac_mc_del_mc(), and this triggers the kobj release method, the
mci memory will be freed automatically. So, all we have left is ctl_name,
as shown by enabling debug:
[ 80.822186] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 1020: edac_remove_sysfs_mci_device() remove_link
[ 80.832590] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 1024: edac_remove_sysfs_mci_device() remove_mci_instance
[ 80.843776] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 640: edac_mci_control_release() mci instance idx=0 releasing
[ 80.855163] EDAC MC: Removed device 0 for i7core_edac.c i7 core #0: DEV 0000:3f:03.0
[ 80.862936] EDAC DEBUG: in drivers/edac/i7core_edac.c, line at 2089: (null): free structs
[ 80.871134] EDAC DEBUG: in drivers/edac/edac_mc.c, line at 238: edac_mc_free()
[ 80.878379] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 726: edac_mc_unregister_sysfs_main_kobj()
[ 80.888043] EDAC DEBUG: in drivers/edac/i7core_edac.c, line at 1232: drivers/edac/i7core_edac.c: i7core_put_devices()
Also, kfree(mci) shouldn't happen at the kobj.release, as it happens
when edac_remove_sysfs_mci_device() is called, but the logic is:
edac_remove_sysfs_mci_device(mci);
edac_printk(KERN_INFO, EDAC_MC,
"Removed device %d for %s %s: DEV %s\n", mci->mc_idx,
mci->mod_name, mci->ctl_name, edac_dev_name(mci));
So, as the edac_printk() needs the mci struct, this generates an OOPS.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
This is important to track a nasty bug at the free logic.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
|
|
A very nasty bug were happening on edac core, due to the way mci objects are
freed. mci memory is freed when kobject count reaches zero, by
edac_mci_control_release(). However, from the logs, this is clearly happening
before the final usage of mci struct:
[15799.607454] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 640: edac_mci_control_release() mci instance idx=0 releasing
[15799.618773] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 769: edac_inst_grp_release()
[15799.627326] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 894: edac_remove_mci_instance_attributes() end of seeking for group all_channel_counts
[15799.640887] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 877: edac_remove_mci_instance_attributes() sysfs_attrib = ffffffffa01d7240
[15799.653412] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 1020: edac_remove_sysfs_mci_device() remove_link
[15799.663753] EDAC DEBUG: in drivers/edac/edac_mc_sysfs.c, line at 1024: edac_remove_sysfs_mci_device() remove_mci_instance
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Make sure we remove groups at the right order
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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