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For assigning sysfs entries for a card device from the driver,
introduce a new helper function, snd_card_add_dev_attr(). In this
way, we can avoid the possible race between the device registration
and the sysfs addition / removal.
The driver can pass a new attribute group to add freely. This has to
be called before snd_card_register().
Currently, up to two extra groups can be added. More than that, it'll
return an error.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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While commit 7e36ef8205ff ("IB/core: Temporarily disable
ex_query_device uverb") is correct as it makes the extended
QUERY_DEVICE uverb (which came as part of commit 5a77abf9a97a
("IB/core: Add support for extended query device caps") and commit
860f10a799c8 ("IB/core: Add flags for on demand paging support")) not
available to userspace, it doesn't address the initial issue regarding
ib_copy_to_udata() [1][2].
Additionally, further discussions around this new uverb seems to
conclude it would require a different data structure than the one
currently described in <rdma/ib_user_verbs.h> [3].
Both of these issues require a revert of the changes, so this patch
partially reverts commit 8cdd312cfed7 ("IB/mlx5: Implement the ODP
capability query verb") and commit 860f10a799c8 ("IB/core: Add flags
for on demand paging support") and fully reverts commit 5a77abf9a97a
("IB/core: Add support for extended query device caps").
[1] "Re: [PATCH v3 06/17] IB/core: Add support for extended query device caps"
http://mid.gmane.org/1418733236.2779.26.camel@opteya.com
[2] "Re: [PATCH] IB/core: Temporarily disable ex_query_device uverb"
http://mid.gmane.org/1423067503.3030.83.camel@opteya.com
[3] "RE: [PATCH v1 1/5] IB/uverbs: ex_query_device: answer must not depend on request's comp_mask"
http://mid.gmane.org/2807E5FD2F6FDA4886F6618EAC48510E0CC12C30@CRSMSX101.amr.corp.intel.com
Cc: Eli Cohen <eli@mellanox.com>
Cc: Haggai Eran <haggaie@mellanox.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Sagi Grimberg <sagig@mellanox.com>
Cc: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into next/dt
Merge "ARM: rockchip: third (and last) batch of dts updates for 3.20" from
Heiko Stübner:
Change are regulator nodes for the cpu and gpu regulators on the act8846
variant of the rk3288-evb and the setting of a clock for the watchdog.
Also the lcd and hdmi controllers on both the firefly and the evb get
enabled and let us now boot into fbcon console sucessfully.
* tag 'v3.20-rockchip-dts3' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
ARM: dts: rockchip: move the hdmi ddc-i2c-bus property to the actual boards
ARM: dts: rockchip: enable vops and hdmi output on rk3288-firefly and -evb
ARM: dts: rockchip: housekeeping off i2c0 on rk3288-evb boards
ARM: dts: rockchip: add cpu and gpu regulators to rk3288-evb-act8846
ARM: dts: rockchip: add rk3288 watchdog clock
clk: rockchip: add id for watchdog pclk on rk3288
clk: rockchip: add clock IDs for the PVTM clocks
clk: rockchip: add clock ID for usbphy480m_src
Signed-off-by: Olof Johansson <olof@lixom.net>
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If we're sending an asynchronous layoutreturn, then we need to ensure
that the inode and the super block remain pinned.
Cc: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Reviewed-by: Peng Tao <tao.peng@primarydata.com>
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If we're sending an asynchronous layoutcommit, then we need to ensure
that the inode and the super block remain pinned.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Reviewed-by: Peng Tao <tao.peng@primarydata.com>
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RFC 4429 ("Optimistic DAD") states that optimistic addresses
should be treated as deprecated addresses. From section 2.1:
Unless noted otherwise, components of the IPv6 protocol stack
should treat addresses in the Optimistic state equivalently to
those in the Deprecated state, indicating that the address is
available for use but should not be used if another suitable
address is available.
Optimistic addresses are indeed avoided when other addresses are
available (i.e. at source address selection time), but they have
not heretofore been available for things like explicit bind() and
sendmsg() with struct in6_pktinfo, etc.
This change makes optimistic addresses treated more like
deprecated addresses than tentative ones.
Signed-off-by: Erik Kline <ek@google.com>
Acked-by: Lorenzo Colitti <lorenzo@google.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Conflicts:
drivers/net/vxlan.c
drivers/vhost/net.c
include/linux/if_vlan.h
net/core/dev.c
The net/core/dev.c conflict was the overlap of one commit marking an
existing function static whilst another was adding a new function.
In the include/linux/if_vlan.h case, the type used for a local
variable was changed in 'net', whereas the function got rewritten
to fix a stacked vlan bug in 'net-next'.
In drivers/vhost/net.c, Al Viro's iov_iter conversions in 'net-next'
overlapped with an endainness fix for VHOST 1.0 in 'net'.
In drivers/net/vxlan.c, vxlan_find_vni() added a 'flags' parameter
in 'net-next' whereas in 'net' there was a bug fix to pass in the
correct network namespace pointer in calls to this function.
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: AC'97 fixes
These are rather too large for this late in the release cycle but
they're clear, well understood and have been tested to fix a regression
which was introduced for v3.19. The details are all in Lars' changelog
and they've been cooking in -next for a while, to a large extent out
of conservatism about the size.
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v3.19
A few last minute fixes for v3.19, all driver specific. None of them
stand out particularly - it's all the standard people who are affected
will care stuff.
The Samsung fix is a DT only fix for the audio controller, it's being
merged via the ASoC tree due to process messups (the submitter sent it
at the end of a tangentally related series rather than separately to the
ARM folks) in order to make sure that it gets to people sooner.
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Pull networking fixes from David Miller:
1) Stretch ACKs can kill performance with Reno and CUBIC congestion
control, largely due to LRO and GRO. Fix from Neal Cardwell.
2) Fix userland breakage because we accidently emit zero length netlink
messages from the bridging code. From Roopa Prabhu.
3) Carry handling in generic csum_tcpudp_nofold is broken, fix from
Karl Beldan.
4) Remove bogus dev_set_net() calls from CAIF driver, from Nicolas
Dichtel.
5) Make sure PPP deflation never returns a length greater then the
output buffer, otherwise we overflow and trigger skb_over_panic().
Fix from Florian Westphal.
6) COSA driver needs VIRT_TO_BUS Kconfig dependencies, from Arnd
Bergmann.
7) Don't increase route cached MTU on datagram too big ICMPs. From Li
Wei.
8) Fix error path leaks in nf_tables, from Pablo Neira Ayuso.
9) Fix bitmask handling regression in netlink that broke things like
acpi userland tools. From Pablo Neira Ayuso.
10) Wrong header pointer passed to param_type2af() in SCTP code, from
Saran Maruti Ramanara.
11) Stacked vlans not handled correctly by vlan_get_protocol(), from
Toshiaki Makita.
12) Add missing DMA memory barrier to xgene driver, from Iyappan
Subramanian.
13) Fix crash in rate estimators, from Eric Dumazet.
14) We've been adding various workarounds, one after another, for the
change which added the per-net tcp_sock. It was meant to reduce
socket contention but added lots of problems.
Reduce this instead to a proper per-cpu socket and that rids us of
all the daemons.
From Eric Dumazet.
15) Fix memory corruption and OOPS in mlx4 driver, from Jack
Morgenstein.
16) When we disabled UFO in the virtio_net device, it introduces some
serious performance regressions. The orignal problem was IPV6
fragment ID generation, so fix that properly instead. From Vlad
Yasevich.
17) sr9700 driver build breaks on xtensa because it defines macros with
the same name as those used by the arch code. Use more unique
names. From Chen Gang.
18) Fix endianness in new virio 1.0 mode of the vhost net driver, from
Michael S Tsirkin.
19) Several sysctls were setting the maxlen attribute incorrectly, from
Sasha Levin.
20) Don't accept an FQ scheduler quantum of zero, that leads to crashes.
From Kenneth Klette Jonassen.
21) Fix dumping of non-existing actions in the packet scheduler
classifier. From Ignacy Gawędzki.
22) Return the write work_done value when doing TX work in the qlcnic
driver.
23) ip6gre_err accesses the info field with the wrong endianness, from
Sabrina Dubroca.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (54 commits)
sit: fix some __be16/u16 mismatches
ipv6: fix sparse errors in ip6_make_flowlabel()
net: remove some sparse warnings
flow_keys: n_proto type should be __be16
ip6_gre: fix endianness errors in ip6gre_err
qlcnic: Fix NAPI poll routine for Tx completion
amd-xgbe: Set RSS enablement based on hardware features
amd-xgbe: Adjust for zero-based traffic class count
cls_api.c: Fix dumping of non-existing actions' stats.
pkt_sched: fq: avoid hang when quantum 0
net: rds: use correct size for max unacked packets and bytes
vhost/net: fix up num_buffers endian-ness
gianfar: correct the bad expression while writing bit-pattern
net: usb: sr9700: Use 'SR_' prefix for the common register macros
Revert "drivers/net: Disable UFO through virtio"
Revert "drivers/net, ipv6: Select IPv6 fragment idents for virtio UFO packets"
ipv6: Select fragment id during UFO segmentation if not set.
xen-netback: stop the guest rx thread after a fatal error
net/mlx4_core: Fix kernel Oops (mem corruption) when working with more than 80 VFs
isdn: off by one in connect_res()
...
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And also remove the unused bdev argument.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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Make use of a new interface provided by iov_iter, backed by
scatter-gather list of iovec, instead of the old interface based on
sg_iovec. Also use iov_iter_advance() instead of manual iteration.
This commit should contain only literal replacements, without
functional changes.
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Doug Gilbert <dgilbert@interlog.com>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
[dpark: add more description in commit message]
Signed-off-by: Dongsu Park <dongsu.park@profitbricks.com>
[hch: fixed to do a deep clone of the iov_iter, and to properly use
the iov_iter direction]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
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the current GPE APIs
ACPICA commit 199cad16530a45aea2bec98e528866e20c5927e1
Since whether the GPE should be disabled/enabled/cleared should only be
determined by the GPE driver's state machine:
1. GPE should be disabled if the driver wants to switch to the GPE polling
mode when a GPE storm condition is indicated and should be enabled if
the driver wants to switch back to the GPE interrupt mode when all of
the storm conditions are cleared. The conditions should be protected by
the driver's specific lock.
2. GPE should be enabled if the driver has accepted more than one request
and should be disabled if the driver has completed all of the requests.
The request count should be protected by the driver's specific lock.
3. GPE should be cleared either when the driver is about to handle an edge
triggered GPE or when the driver has completed to handle a level
triggered GPE. The handling code should be protected by the driver's
specific lock.
Thus the GPE enabling/disabling/clearing operations are likely to be
performed with the driver's specific lock held while we currently cannot do
this. This is because:
1. We have the acpi_gbl_gpe_lock held before invoking the GPE driver's
handler. Driver's specific lock is likely to be held inside of the
handler, thus we can see some dead lock issues due to the reversed
locking order or recursive locking. In order to solve such dead lock
issues, we need to unlock the acpi_gbl_gpe_lock before invoking the
handler. BZ 1100.
2. Since GPE disabling/enabling/clearing should be determined by the GPE
driver's state machine, we shouldn't perform such operations inside of
ACPICA for a GPE handler to mess up the driver's state machine. BZ 1101.
Originally this patch includes a logic to flush GPE handlers, it is dropped
due to the following reasons:
1. This is a different issue;
2. Linux OSL has fixed this by flushing SCI in acpi_os_wait_events_complete().
We will pick up this topic when the Linux OSL fix turns out to be not
sufficient.
Note that currently the internal operations and the acpi_gbl_gpe_lock are
also used by ACPI_GPE_DISPATCH_METHOD and ACPI_GPE_DISPATCH_NOTIFY. In
order not to introduce regressions, we add one
ACPI_GPE_DISPATCH_RAW_HANDLER type to be distiguished from
ACPI_GPE_DISPATCH_HANDLER. For which the acpi_gbl_gpe_lock is unlocked before
invoking the GPE handler and the internal enabling/disabling operations are
bypassed to allow drivers to perform them at a proper position using the
GPE APIs and ACPI_GPE_DISPATCH_RAW_HANDLER users should invoke acpi_set_gpe()
instead of acpi_enable_gpe()/acpi_disable_gpe() to bypass the internal GPE
clearing code in acpi_enable_gpe(). Lv Zheng.
Known issues:
1. Edge-triggered GPE lost for frequent enablings
On some buggy silicon platforms, GPE enable line may not be directly
wired to the GPE trigger line. In that case, when GPE enabling is
frequently performed for edge-triggered GPEs, GPE status may stay set
without being triggered.
This patch may maginify this problem as it allows GPE enabling to be
parallel performed during the process the GPEs are handled.
This is an existing issue, because:
1. For task context:
Current ACPI_GPE_DISPATCH_METHOD practices have proven that this
isn't a real issue - we can re-enable edge-triggered GPE in a work
queue where the GPE status bit might already be set.
2. For IRQ context:
This can even happen when the GPE enabling occurs before returning
from the GPE handler and after unlocking the GPE lock.
Thus currently no code is included to protect this.
Link: https://github.com/acpica/acpica/commit/199cad16
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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ACPICA commit e06b1624b02dc8317d144e9a6fe9d684c5fa2f90
Version 20150204.
Link: https://github.com/acpica/acpica/commit/e06b1624
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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ACPICA commit 8990e73ab2aa15d6a0068b860ab54feff25bee36
Link: https://github.com/acpica/acpica/commit/8990e73a
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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ACPICA commit 7926d5ca9452c87f866938dcea8f12e1efb58f89
There is an issue in acpi_install_gpe_handler() and acpi_remove_gpe_handler().
The code to obtain the GPE dispatcher type from the Handler->original_flags
is wrong:
if (((Handler->original_flags & ACPI_GPE_DISPATCH_METHOD) ||
(Handler->original_flags & ACPI_GPE_DISPATCH_NOTIFY)) &&
ACPI_GPE_DISPATCH_NOTIFY is 0x03 and ACPI_GPE_DISPATCH_METHOD is 0x02, thus
this statement is TRUE for the following dispatcher types:
0x01 (ACPI_GPE_DISPATCH_HANDLER): not expected
0x02 (ACPI_GPE_DISPATCH_METHOD): expected
0x03 (ACPI_GPE_DISPATCH_NOTIFY): expected
There is no functional issue due to this because Handler->original_flags is
only set in acpi_install_gpe_handler(), and an earlier checker has excluded
the ACPI_GPE_DISPATCH_HANDLER:
if ((gpe_event_info->Flags & ACPI_GPE_DISPATCH_MASK) ==
ACPI_GPE_DISPATCH_HANDLER)
{
Status = AE_ALREADY_EXISTS;
goto free_and_exit;
}
...
Handler->original_flags = (u8) (gpe_event_info->Flags &
(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK));
We need to clean this up before modifying the GPE dispatcher type values.
In order to prevent such issue from happening in the future, this patch
introduces ACPI_GPE_DISPATCH_TYPE() macro to be used to obtain the GPE
dispatcher types. Lv Zheng.
Link: https://github.com/acpica/acpica/commit/7926d5ca
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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We need to parse APIC ID for IOAPIC registration for IOAPIC hotplug.
ACPI _MAT method and MADT table are used to figure out IOAPIC ID, just
like parsing CPU APIC ID for CPU hotplug.
[ tglx: Fixed docbook comment ]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Len Brown <lenb@kernel.org>
Link: http://lkml.kernel.org/r/1414387308-27148-8-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Use common resource list management data structure and interfaces
instead of private implementation.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Currently ACPI, PCI and pnp all implement the same resource list
management with different data structure. We need to transfer from
one data structure into another when passing resources from one
subsystem into another subsystem. So move struct resource_list_entry
from ACPI into resource core and rename it as resource_entry,
then it could be reused by different subystems and avoid the data
structure conversion.
Introduce dedicated header file resource_ext.h instead of embedding
it into ioport.h to avoid header file inclusion order issues.
Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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The cevt-r4k driver used to call into the GIC driver to find whether the
timer was pending, but only with External Interrupt Controller (EIC)
mode, where the Cause.IP bits can't be used as they encode the interrupt
priority level (Cause.RIPL) instead.
However commit e9de688dac65 ("irqchip: mips-gic: Support local
interrupts") changed the condition from cpu_has_veic to gic_present.
This fails on cores such as P5600 which have a GIC but the local
interrupts aren't routable by the GIC, causing c0_compare_int_usable()
to consider the interrupt unusable so r4k_clockevent_init() fails.
The previous behaviour, added in commit 98b67c37db33 ("MIPS: Add EIC
support for GIC."), wasn't really correct either as far as I can tell,
since P5600 apparently supports EIC mode too, and in any case the use of
Cause.TI with r2 should have been sufficient anyway since commit
010c108d7af7 ("MIPS: PowerTV: Fix support for timer interrupts with > 64
external IRQs").
Therefore drop the call into the gic driver altogether, and add a
comment in c0_compare_int_pending() to clarify that Cause.TI does get
checked since MIPS r2.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Fixes: e9de688dac65 ("irqchip: mips-gic: Support local interrupts")
Reviewed-by: Andrew Bresticker <abrestic@chromium.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Steven J. Hill <steven.hill@imgtec.com>
Cc: Qais Yousef <qais.yousef@imgtec.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9077/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Add three methods to allow exporting pnfs block layout volumes:
- get_uuid: get a filesystem unique signature exposed to clients
- map_blocks: map and if nessecary allocate blocks for a layout
- commit_blocks: commit blocks in a layout once the client is done with them
For now we stick the external pnfs block layout interfaces into s_export_op to
avoid mixing them up with the internal interface between the NFS server and
the layout drivers. Once we've fully internalized the latter interface we
can redecide if these methods should stay in s_export_ops.
Signed-off-by: Christoph Hellwig <hch@lst.de>
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After f78146b0f923, "KVM: Fix page-crossing MMIO", and
87da7e66a405, "KVM: x86: fix vcpu->mmio_fragments overflow",
actually KVM_MMIO_SIZE is gone.
Signed-off-by: Tiejun Chen <tiejun.chen@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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include/net/ipv6.h:713:22: warning: incorrect type in assignment (different base types)
include/net/ipv6.h:713:22: expected restricted __be32 [usertype] hash
include/net/ipv6.h:713:22: got unsigned int
include/net/ipv6.h:719:25: warning: restricted __be32 degrades to integer
include/net/ipv6.h:719:22: warning: invalid assignment: ^=
include/net/ipv6.h:719:22: left side has type restricted __be32
include/net/ipv6.h:719:22: right side has type unsigned int
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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(struct flow_keys)->n_proto is in network order, use
proper type for this.
Fixes following sparse errors :
net/core/flow_dissector.c:139:39: warning: incorrect type in assignment (different base types)
net/core/flow_dissector.c:139:39: expected unsigned short [unsigned] [usertype] n_proto
net/core/flow_dissector.c:139:39: got restricted __be16 [assigned] [usertype] proto
net/core/flow_dissector.c:237:23: warning: incorrect type in assignment (different base types)
net/core/flow_dissector.c:237:23: expected unsigned short [unsigned] [usertype] n_proto
net/core/flow_dissector.c:237:23: got restricted __be16 [assigned] [usertype] proto
Signed-off-by: Eric Dumazet <edumazet@google.com>
Fixes: e0f31d849867 ("flow_keys: Record IP layer protocol in skb_flow_dissect()")
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add an optimization for the MS_LAZYTIME mount option so that we will
opportunistically write out any inodes with the I_DIRTY_TIME flag set
in a particular inode table block when we need to update some inode in
that inode table block anyway.
Also add some temporary code so that we can set the lazytime mount
option without needing a modified /sbin/mount program which can set
MS_LAZYTIME. We can eventually make this go away once util-linux has
added support.
Google-Bug-Id: 18297052
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Add a new function find_inode_nowait() which is an even more general
version of ilookup5_nowait(). It is designed for callers which need
very fine grained control over when the function is allowed to block
or increment the inode's reference count.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Add a new mount option which enables a new "lazytime" mode. This mode
causes atime, mtime, and ctime updates to only be made to the
in-memory version of the inode. The on-disk times will only get
updated when (a) if the inode needs to be updated for some non-time
related change, (b) if userspace calls fsync(), syncfs() or sync(), or
(c) just before an undeleted inode is evicted from memory.
This is OK according to POSIX because there are no guarantees after a
crash unless userspace explicitly requests via a fsync(2) call.
For workloads which feature a large number of random write to a
preallocated file, the lazytime mount option significantly reduces
writes to the inode table. The repeated 4k writes to a single block
will result in undesirable stress on flash devices and SMR disk
drives. Even on conventional HDD's, the repeated writes to the inode
table block will trigger Adjacent Track Interference (ATI) remediation
latencies, which very negatively impact long tail latencies --- which
is a very big deal for web serving tiers (for example).
Google-Bug-Id: 18297052
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Instead of using magic number in the code the patch provides
DW_DMA_MAX_NR_MASTERS constant.
While here, restrict the reading of data width array by amount of the actual
number of AHB masters.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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The dma_dev field is widely used in filter functions to mach with a proper DMA
controller device. Thus it's not deprecated. The patch fixes the description of
that field. There is no functional change.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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FQ has a fast path for skb attached to a socket, as it does not
have to compute a flow hash. But for other packets, FQ being non
stochastic means that hosts exposed to random Internet traffic
can allocate million of flows structure (104 bytes each) pretty
easily. Not only host can OOM, but lookup in RB trees can take
too much cpu and memory resources.
This patch adds a new attribute, orphan_mask, that is adding
possibility of having a stochastic hash for orphaned skb.
Its default value is 1024 slots, to mimic SFQ behavior.
Note: This does not apply to locally generated TCP traffic,
and no locally generated traffic will share a flow structure
with another perfect or stochastic flow.
This patch also handles the specific case of SYNACK messages:
They are attached to the listener socket, and therefore all map
to a single hash bucket. If listener have set SO_MAX_PACING_RATE,
hoping to have new accepted socket inherit this rate, SYNACK
might be paced and even dropped.
This is very similar to an internal patch Google have used more
than one year.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-next
ASoC: Updates for v3.20
More updates for v3.20:
- Lots of refactoring from Lars-Peter Clausen, moving drivers to more
data driven initialization and rationalizing a lot of DAPM usage.
- Much improved handling of CDCLK clocks on Samsung I2S controllers.
- Lots of driver specific cleanups and feature improvements.
- CODEC support for TI PCM514x and TLV320AIC3104 devices.
- Board support for Tegra systems with Realtek RT5677.
Conflicts:
sound/soc/intel/sst-mfld-platform-pcm.c
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
More iov_iter work from Al Viro.
Signed-off-by: David S. Miller <davem@davemloft.net>
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When we added pacing to TCP, we decided to let sch_fq take care
of actual pacing.
All TCP had to do was to compute sk->pacing_rate using simple formula:
sk->pacing_rate = 2 * cwnd * mss / rtt
It works well for senders (bulk flows), but not very well for receivers
or even RPC :
cwnd on the receiver can be less than 10, rtt can be around 100ms, so we
can end up pacing ACK packets, slowing down the sender.
Really, only the sender should pace, according to its own logic.
Instead of adding a new bit in skb, or call yet another flow
dissection, we tweak skb->truesize to a small value (2), and
we instruct sch_fq to use new helper and not pace pure ack.
Note this also helps TCP small queue, as ack packets present
in qdisc/NIC do not prevent sending a data packet (RPC workload)
This helps to reduce tx completion overhead, ack packets can use regular
sock_wfree() instead of tcp_wfree() which is a bit more expensive.
This has no impact in the case packets are sent to loopback interface,
as we do not coalesce ack packets (were we would detect skb->truesize
lie)
In case netem (with a delay) is used, skb_orphan_partial() also sets
skb->truesize to 1.
This patch is a combination of two patches we used for about one year at
Google.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Some existing rhashtable users get too intimate with it by walking
the buckets directly. This prevents us from easily changing the
internals of rhashtable.
This patch adds the helpers rhashtable_walk_init/exit/start/next/stop
which will replace these custom walkers.
They are meant to be usable for both procfs seq_file walks as well
as walking by a netlink dump. The iterator structure should fit
inside a netlink dump cb structure, with at least one element to
spare.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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into drm-next
drm-intel-next-2015-01-30:
- chv rps improvements from Ville
- atomic state handling prep work from Ander
- execlist request tracking refactoring from Nick Hoath
- forcewake code consolidation from Chris&Mika
- fastboot plane config refactoring and skl support from Damien
- some more skl pm patches all over (Damien)
- refactor dsi code to use drm dsi helpers and drm_panel infrastructure (Jani)
- first cut at experimental atomic plane updates (Matt Roper)
- piles of smaller things all over, as usual
* 'drm-intel-next' of git://anongit.freedesktop.org/drm-intel: (102 commits)
drm/i915: Remove bogus locking check in the hangcheck code
drm/i915: Update DRIVER_DATE to 20150130
drm/i915: Use pipe_config's cpu_transcoder for reading encoder hw state
drm/i915: Fix a use-after-free in intel_execlists_retire_requests
drm/i915: Split shared dpll setup out of __intel_set_mode()
drm/i915: Don't do posting reads on getting forcewake
drm/i915: Do uncore early sanitize after domain init
drm/i915: Handle CHV in vlv_set_rps_idle()
drm/i915: Remove nested work in gpu error handling
drm/i915/documentation: Add intel_uncore.c to drm.tmpl
drm/i915/dsi: remove intel_dsi_cmd.c and the unused functions therein
drm/i915/dsi: move dpi_send_cmd() to intel_dsi.c and make it static
drm/i915/dsi: remove old read/write functions in favor of new stuff
drm/i915/dsi: make the vbt panel driver use mipi_dsi_device for transfers
drm/i915/dsi: add drm mipi dsi host support
drm/i915/dsi: switch to drm_panel interface
drm/i915/skl: Enabling PSR on Skylake
Revert "drm/i915: Fix mutex->owner inspection race under DEBUG_MUTEXES"
drm/i915: Be consistent on printing seqnos
drm/i915: Display current hangcheck status in debugfs
...
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Supply interface functions to bond and unbond ports of a mlx4 internal
interfaces. Example for such an interface is the one registered by the
mlx4 IB driver under RoCE.
There are
1. Functions to go in/out to/from bonded mode
2. Function to remap virtual ports to physical ports
The bond_mutex prevents simultaneous access to data that keep status of
the device in bonded mode.
The upper mlx4 interface marks to the mlx4 core module that they
want to be subject for such bonding by setting the MLX4_INTFF_BONDING
flag. Interface which goes to/from bonded mode is re-created.
The mlx4 Ethernet driver does not set this flag when registering the
interface, the IB driver does.
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Implement the hardware interface required for port aggregation.
1. Disable RX port check on receive - don't perform a validity check
that matches to QP's port and the port where the packet is received.
2. Virtual to physical port remap - configure virtual to physical port
mapping. Port remap capability for virtual functions.
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Use notifier chain to dispatch an event upon a change in slave state.
Event is dispatched with slave specific info.
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Move slave state changes to a helper function, this is a pre-step for adding
functionality of dispatching an event when this helper is called.
This commit doesn't add new functionality.
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add event which provides an indication on a change in the state
of a bonding slave. The event handler should cast the pointer to the
appropriate type (struct netdev_bonding_info) in order to get the
full info about the slave.
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
Last round of updates for net-next:
* revert a patch that caused a regression with mesh userspace (Bob)
* fix a number of suspend/resume related races
(from Emmanuel, Luca and myself - we'll look at backporting later)
* add software implementations for new ciphers (Jouni)
* add a new ACPI ID for Broadcom's rfkill (Mika)
* allow using netns FD for wireless (Vadim)
* some other cleanups (various)
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next
Johan Hedberg says:
====================
pull request: bluetooth-next 2015-02-03
Here's what's likely the last bluetooth-next pull request for 3.20.
Notable changes include:
- xHCI workaround + a new id for the ath3k driver
- Several new ids for the btusb driver
- Support for new Intel Bluetooth controllers
- Minor cleanups to ieee802154 code
- Nested sleep warning fix in socket accept() code path
- Fixes for Out of Band pairing handling
- Support for LE scan restarting for HCI_QUIRK_STRICT_DUPLICATE_FILTER
- Improvements to data we expose through debugfs
- Proper handling of Hardware Error HCI events
Please let me know if there are any issues pulling. Thanks.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch adds skb_remcsum_process and skb_gro_remcsum_process to
perform the appropriate adjustments to the skb when receiving
remote checksum offload.
Updated vxlan and gue to use these functions.
Tested: Ran TCP_RR and TCP_STREAM netperf for VXLAN and GUE, did
not see any change in performance.
Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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A typical qdisc setup is the following :
bond0 : bonding device, using HTB hierarchy
eth1/eth2 : slaves, multiqueue NIC, using MQ + FQ qdisc
XPS allows to spread packets on specific tx queues, based on the cpu
doing the send.
Problem is that dequeues from bond0 qdisc can happen on random cpus,
due to the fact that qdisc_run() can dequeue a batch of packets.
CPUA -> queue packet P1 on bond0 qdisc, P1->ooo_okay=1
CPUA -> queue packet P2 on bond0 qdisc, P2->ooo_okay=0
CPUB -> dequeue packet P1 from bond0
enqueue packet on eth1/eth2
CPUC -> dequeue packet P2 from bond0
enqueue packet on eth1/eth2 using sk cache (ooo_okay is 0)
get_xps_queue() then might select wrong queue for P1, since current cpu
might be different than CPUA.
P2 might be sent on the old queue (stored in sk->sk_tx_queue_mapping),
if CPUC runs a bit faster (or CPUB spins a bit on qdisc lock)
Effect of this bug is TCP reorders, and more generally not optimal
TX queue placement. (A victim bulk flow can be migrated to the wrong TX
queue for a while)
To fix this, we have to record sender cpu number the first time
dev_queue_xmit() is called for one tx skb.
We can union napi_id (used on receive path) and sender_cpu,
granted we clear sender_cpu in skb_scrub_packet() (credit to Willem for
this union idea)
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Cc: Nandita Dukkipati <nanditad@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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'asoc/topic/sh', 'asoc/topic/simple' and 'asoc/topic/sta32x' into asoc-next
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'asoc/topic/rcar' into asoc-next
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'asoc/topic/davinci' into asoc-next
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