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2011-07-08Merge branch 'xen-tmem-selfballoon-v8' of ↵Konrad Rzeszutek Wilk
git://git.kernel.org/pub/scm/linux/kernel/git/djm/tmem into stable/drivers * 'xen-tmem-selfballoon-v8' of git://git.kernel.org/pub/scm/linux/kernel/git/djm/tmem: xen: tmem: self-ballooning and frontswap-selfshrinking
2011-07-08xen: tmem: self-ballooning and frontswap-selfshrinkingDan Magenheimer
This patch introduces two in-kernel drivers for Xen transcendent memory ("tmem") functionality that complement cleancache and frontswap. Both use control theory to dynamically adjust and optimize memory utilization. Selfballooning controls the in-kernel Xen balloon driver, targeting a goal value (vm_committed_as), thus pushing less frequently used clean page cache pages (through the cleancache code) into Xen tmem where Xen can balance needs across all VMs residing on the physical machine. Frontswap-selfshrinking controls the number of pages in frontswap, driving it towards zero (effectively doing a partial swapoff) when in-kernel memory pressure subsides, freeing up RAM for other VMs. More detail is provided in the header comment of xen-selfballooning.c. Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com> [v8: konrad.wilk@oracle.com: set default enablement depending on frontswap] [v7: konrad.wilk@oracle.com: fix capitalization and punctuation in comments] [v6: fix frontswap-selfshrinking initialization] [v6: konrad.wilk@oracle.com: fix init pr_infos; add comments about swap] [v5: konrad.wilk@oracle.com: add NULL to attr list; move inits up to decls] [v4: dkiper@net-space.pl: use strict_strtoul plus a few syntactic nits] [v3: konrad.wilk@oracle.com: fix potential divides-by-zero] [v3: konrad.wilk@oracle.com: add many more comments, fix nits] [v2: rebased to linux-3.0-rc1] [v2: Ian.Campbell@citrix.com: reorganize as new file (xen-selfballoon.c)] [v2: dkiper@net-space.pl: proper access to vm_committed_as] [v2: dkiper@net-space.pl: accounting fixes] Cc: Jan Beulich <JBeulich@novell.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: <xen-devel@lists.xensource.com>
2011-06-30xen: Add module alias to autoload backend driversBastian Blank
All the Xen backend drivers are assigned to a special bus type xen-backend. This patch exports xen-backend:* names through modalias and uevent to autoload them. Signed-off-by: Bastian Blank <waldi@debian.org> Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-06-30xen: Populate xenbus device attributesBastian Blank
The xenbus bus type uses device_create_file to assign all used device attributes. However it does not remove them when the device goes away. This patch uses the dev_attrs field of the bus type to specify default attributes for all devices. Signed-off-by: Bastian Blank <waldi@debian.org> Acked-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-06-30xen: Add __attribute__((format(printf... where appropriateJoe Perches
Use the compiler to verify printf formats and arguments. Fix fallout. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-06-21Merge branch 'stable/vga.support' into stable/driversKonrad Rzeszutek Wilk
* stable/vga.support: xen: allow enable use of VGA console on dom0
2011-06-21Merge branch 'stable/frontswap-tmemonly' of ↵Konrad Rzeszutek Wilk
git://git.kernel.org/pub/scm/linux/kernel/git/djm/tmem into stable/drivers * 'stable/frontswap-tmemonly' of git://git.kernel.org/pub/scm/linux/kernel/git/djm/tmem: xen: prepare tmem shim to handle frontswap
2011-06-20Linux 3.0-rc4v3.0-rc4Linus Torvalds
2011-06-20vfs: i_state needs to be 'unsigned long' for nowLinus Torvalds
Commit 13e12d14e2dc ("vfs: reorganize 'struct inode' layout a bit") moved things around a bit changed i_state to be unsigned int instead of unsigned long. That was to help structure layout for the 64-bit case, and shrink 'struct inode' a bit (admittedly that only happened when spinlock debugging was on and i_flags didn't pack with i_lock). However, Meelis Roos reports that this results in unaligned exceptions on sprc, and it turns out that the bit-locking primitives that we use for the I_NEW bit want to use the bitops. Which want 'unsigned long', not 'unsigned int'. We really should fix the bit locking code to not have that kind of requirement, but that's a much bigger change. So for now, revert that field back to 'unsigned long' (but keep the other re-ordering changes from the commit that caused this). Andi points out that we have played games with this in 'struct page', so it's solvable with other hacks too, but since right now the struct inode size advantage only happens with some rare config options, it's not worth fighting. It _would_ be worth fixing the bitlocking code, though. Especially since there is no type safety in the bitlocking code (this never caused any warnings, and worked fine on x86-64, because the bitlocks take a 'void *' and x86-64 doesn't care that deeply about alignment). So it's currently a very easy problem to trigger by mistake and never notice. Reported-by: Meelis Roos <mroos@linux.ee> Cc: Andi Kleen <andi@firstfloor.org> Cc: David Miller <davem@davemloft.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-06-20Merge branch 'drm-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 * 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: drm/radeon/kms/r6xx+: voltage fixes drm/nouveau: drop leftover debugging drm/radeon: avoid warnings from r600/eg irq handlers on powered off card. drm/radeon/kms: add missing param for dce3.2 DP transmitter setup drm/radeon/kms/atom: fix duallink on some early DCE3.2 cards drm/nouveau: fix assumption that semaphore dmaobj is valid in x-chan sync drm/nv50/disp: fix gamma with page flipping overlay turned on drm/nouveau/pm: Prevent overflow in nouveau_perf_init() drm/nouveau: fix big-endian switch
2011-06-20Merge branch 'msm-fix' of git://codeaurora.org/quic/kernel/davidb/linux-msmLinus Torvalds
* 'msm-fix' of git://codeaurora.org/quic/kernel/davidb/linux-msm: msm: timer: Fix DGT rate on 8960 and 8660 msm: timer: compensate for timer shift in msm_read_timer_count msm: timer: Fix SMP build error
2011-06-20Merge branch 'for-2.6.40' of git://linux-nfs.org/~bfields/linuxLinus Torvalds
* 'for-2.6.40' of git://linux-nfs.org/~bfields/linux: nfsd4: fix break_lease flags on nfsd open nfsd: link returns nfserr_delay when breaking lease nfsd: v4 support requires CRYPTO nfsd: fix dependency of nfsd on auth_rpcgss
2011-06-20Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (40 commits) pxa168_eth: fix race in transmit path. ipv4, ping: Remove duplicate icmp.h include netxen: fix race in skb->len access sgi-xp: fix a use after free hp100: fix an skb->len race netpoll: copy dev name of slaves to struct netpoll ipv4: fix multicast losses r8169: fix static initializers. inet_diag: fix inet_diag_bc_audit() gigaset: call module_put before restart of if_open() farsync: add module_put to error path in fst_open() net: rfs: enable RFS before first data packet is received fs_enet: fix freescale FCC ethernet dp buffer alignment netdev: bfin_mac: fix memory leak when freeing dma descriptors vlan: don't call ndo_vlan_rx_register on hardware that doesn't have vlan support caif: Bugfix - XOFF removed channel from caif-mux tun: teach the tun/tap driver to support netpoll dp83640: drop PHY status frames in the driver. dp83640: fix phy status frame event parsing phylib: Allow BCM63XX PHY to be selected only on BCM63XX. ...
2011-06-20Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: devcgroup_inode_permission: take "is it a device node" checks to inlined wrapper fix comment in generic_permission() kill obsolete comment for follow_down() proc_sys_permission() is OK in RCU mode reiserfs_permission() doesn't need to bail out in RCU mode proc_fd_permission() is doesn't need to bail out in RCU mode nilfs2_permission() doesn't need to bail out in RCU mode logfs doesn't need ->permission() at all coda_ioctl_permission() is safe in RCU mode cifs_permission() doesn't need to bail out in RCU mode bad_inode_permission() is safe from RCU mode ubifs: dereferencing an ERR_PTR in ubifs_mount()
2011-06-21drm/radeon/kms/r6xx+: voltage fixesAlex Deucher
0xff01 is not an actual voltage value, but a flag for the driver. If the power state as that value, skip setting the voltage. Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-06-20msm: timer: Fix DGT rate on 8960 and 8660Stephen Boyd
The DGT runs at 27 MHz divided by 4 on 8660 and 8960. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: David Brown <davidb@codeaurora.org>
2011-06-20pxa168_eth: fix race in transmit path.Richard Cochran
Because the socket buffer is freed in the completion interrupt, it is not safe to access it after submitting it to the hardware. Cc: stable@kernel.org Cc: Sachin Sanap <ssanap@marvell.com> Cc: Zhangfei Gao <zgao6@marvell.com> Cc: Philip Rakity <prakity@marvell.com> Signed-off-by: Richard Cochran <richard.cochran@omicron.at> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-20ipv4, ping: Remove duplicate icmp.h includeJesper Juhl
Remove the duplicate inclusion of net/icmp.h from net/ipv4/ping.c Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-20netxen: fix race in skb->len accessEric Dumazet
As soon as skb is given to hardware, TX completion can free skb under us. Therefore, we should update dev stats before kicking the device. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Amit Kumar Salecha <amit.salecha@qlogic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-20Merge branch 'stable/bug.fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen * 'stable/bug.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/setup: Fix for incorrect xen_extra_mem_start. xen: When calling power_off, don't call the halt function. xen: Fix compile warning when CONFIG_SMP is not defined. xen: support CONFIG_MAXSMP xen: partially revert "xen: set max_pfn_mapped to the last pfn mapped"
2011-06-20Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: sh_keysc - 8x8 MODE_6 fix Input: omap-keypad - add missing input_sync() Input: evdev - try to wake up readers only if we have full packet Input: properly assign return value of clamp() macro.
2011-06-20Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: Btrfs: avoid delayed metadata items during commits btrfs: fix uninitialized return value btrfs: fix wrong reservation when doing delayed inode operations btrfs: Remove unused sysfs code btrfs: fix dereference of ERR_PTR value Btrfs: fix relocation races Btrfs: set no_trans_join after trying to expand the transaction Btrfs: protect the pending_snapshots list with trans_lock Btrfs: fix path leakage on subvol deletion Btrfs: drop the delalloc_bytes check in shrink_delalloc Btrfs: check the return value from set_anon_super
2011-06-20Merge branch 'kvm-updates/3.0' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
* 'kvm-updates/3.0' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: Fix register corruption in pvclock_scale_delta KVM: MMU: fix opposite condition in mapping_level_dirty_bitmap KVM: VMX: do not overwrite uptodate vcpu->arch.cr3 on KVM_SET_SREGS KVM: MMU: Fix build warnings in walk_addr_generic()
2011-06-20devcgroup_inode_permission: take "is it a device node" checks to inlined wrapperAl Viro
inode_permission() calls devcgroup_inode_permission() and almost all such calls are _not_ for device nodes; let's at least keep the common path straight... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20fix comment in generic_permission()Al Viro
CAP_DAC_OVERRIDE is enough for MAY_EXEC on directory, even if no exec bits are set. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20kill obsolete comment for follow_down()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20proc_sys_permission() is OK in RCU modeAl Viro
nothing blocking there, since all instances of sysctl ->permissions() method are non-blocking - both of them, that is. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20reiserfs_permission() doesn't need to bail out in RCU modeAl Viro
nothing blocking other than generic_permission() (and check_acl callback does bail out in RCU mode). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20proc_fd_permission() is doesn't need to bail out in RCU modeAl Viro
nothing blocking except generic_permission() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20nilfs2_permission() doesn't need to bail out in RCU modeAl Viro
Nothing blocking except for generic_permission(). Which will DTRT. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20logfs doesn't need ->permission() at allAl Viro
... and never did, what with its ->permission() being what we do by default when ->permission is NULL... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20coda_ioctl_permission() is safe in RCU modeAl Viro
return (mask & MAY_EXEC) ? -EACCES : 0; is non-blocking... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20cifs_permission() doesn't need to bail out in RCU modeAl Viro
nothing potentially blocking except generic_permission(), which will DTRT Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20bad_inode_permission() is safe from RCU modeAl Viro
return -EIO; is *not* a blocking operation, thank you very much. Nick, what the hell have you been smoking? Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20ubifs: dereferencing an ERR_PTR in ubifs_mount()Dan Carpenter
d251ed271d5 "ubifs: fix sget races" left out the goto from this error path so the static checkers complain that we're dereferencing "sb" when it's an ERR_PTR. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-20nfsd4: fix break_lease flags on nfsd openJ. Bruce Fields
Thanks to Casey Bodley for pointing out that on a read open we pass 0, instead of O_RDONLY, to break_lease, with the result that a read open is treated like a write open for the purposes of lease breaking! Reported-by: Casey Bodley <cbodley@citi.umich.edu> Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-06-20drm/nouveau: drop leftover debuggingDave Airlie
this printk isn't really useful, just drop it for now. Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-06-20Merge branch 'drm-nouveau-fixes' of ↵Dave Airlie
git://anongit.freedesktop.org/git/nouveau/linux-2.6 into drm-fixes * 'drm-nouveau-fixes' of git://anongit.freedesktop.org/git/nouveau/linux-2.6: drm/nouveau: fix assumption that semaphore dmaobj is valid in x-chan sync drm/nv50/disp: fix gamma with page flipping overlay turned on drm/nouveau/pm: Prevent overflow in nouveau_perf_init() drm/nouveau: fix big-endian switch
2011-06-20drm/radeon: avoid warnings from r600/eg irq handlers on powered off card.Dave Airlie
Since we were calling the wptr function before checking if the IH was even enabled, or the GPU wasn't shutdown, we'd get spam in the logs when the GPU readback 0xffffffff. This reorders things so we return early in the no IH and GPU shutdown cases. Reported-and-tested-by: ManDay on #radeon Reviewed-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-06-20drm/radeon/kms: add missing param for dce3.2 DP transmitter setupAlex Deucher
This is used during phy init to set up the phy for DP. This may fix DP problems on DCE3.2 cards. Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-06-20drm/radeon/kms/atom: fix duallink on some early DCE3.2 cardsAlex Deucher
Certain revisions of the vbios on DCE3.2 cards have a bug in the transmitter control table which prevents duallink from being enabled properly on some cards. The action switch statement jumps to the wrong offset for the OUTPUT_ENABLE action. The fix is to use the ENABLE action rather than the OUTPUT_ENABLE action on the affected cards. In fixed version of the vbios, both actions jump to the same offset, so the change should be safe. Reported-and-tested-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
2011-06-19sgi-xp: fix a use after freeEric Dumazet
Its illegal to dereference skb after dev_kfree_skb(skb) Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Robin Holt <holt@sgi.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-19hp100: fix an skb->len raceEric Dumazet
As soon as skb is given to hardware and spinlock released, TX completion can free skb under us. Therefore, we should update netdev stats before spinlock release. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-19Merge branch 'davem.r8169' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/romieu/netdev-2.6
2011-06-19netpoll: copy dev name of slaves to struct netpollWANG Cong
Otherwise we will not see the name of the slave dev in error message: [ 388.469446] (null): doesn't support polling, aborting. Signed-off-by: WANG Cong <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-19KVM: Fix register corruption in pvclock_scale_deltaZachary Amsden
The 128-bit multiply in pvclock.h was missing an output constraint for EDX which caused a register corruption to appear. Thanks to Ulrich for diagnosing the EDX corruption and Avi for providing this fix. Signed-off-by: Zachary Amsden <zamsden@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-06-19KVM: MMU: fix opposite condition in mapping_level_dirty_bitmapSteve
The condition is opposite, it always maps huge page for the dirty tracked page Reported-by: Steve <stefan.bosak@gmail.com> Signed-off-by: Steve <stefan.bosak@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-06-19KVM: VMX: do not overwrite uptodate vcpu->arch.cr3 on KVM_SET_SREGSMarcelo Tosatti
Only decache guest CR3 value if vcpu->arch.cr3 is stale. Fixes loadvm with live guest. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Tested-by: Markus Schade <markus.schade@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-06-19KVM: MMU: Fix build warnings in walk_addr_generic()Borislav Petkov
On 3.0-rc1 I get In file included from arch/x86/kvm/mmu.c:2856: arch/x86/kvm/paging_tmpl.h: In function ‘paging32_walk_addr_generic’: arch/x86/kvm/paging_tmpl.h:124: warning: ‘ptep_user’ may be used uninitialized in this function In file included from arch/x86/kvm/mmu.c:2852: arch/x86/kvm/paging_tmpl.h: In function ‘paging64_walk_addr_generic’: arch/x86/kvm/paging_tmpl.h:124: warning: ‘ptep_user’ may be used uninitialized in this function caused by 6e2ca7d1802bf8ed9908435e34daa116662e7790. According to Takuya Yoshikawa, ptep_user won't be used uninitialized so shut up gcc. Cc: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Link: http://lkml.kernel.org/r/20110530094604.GC21833@liondog.tnic Signed-off-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-06-19Merge branches 'perf-urgent-for-linus', 'sched-urgent-for-linus', ↵Linus Torvalds
'timers-urgent-for-linus' and 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: tools/perf: Fix static build of perf tool tracing: Fix regression in printk_formats file * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: generic-ipi: Fix kexec boot crash by initializing call_single_queue before enabling interrupts * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: clocksource: Make watchdog robust vs. interruption timerfd: Fix wakeup of processes when timer is cancelled on clock change * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, MAINTAINERS: Add x86 MCE people x86, efi: Do not reserve boot services regions within reserved areas
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