- 09 Dec, 2011 19 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf: Do no try to schedule task events if there are none lockdep, kmemcheck: Annotate ->lock in lockdep_init_map() perf header: Use event_name() to get an event name perf stat: Failure with "Operation not supported"
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Mandeep Singh Baines authored
In order to safely dereference current->real_parent inside an rcu_read_lock, we need an rcu_dereference. Signed-off-by:
Mandeep Singh Baines <msb@chromium.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Pavel Emelyanov <xemul@openvz.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Kees Cook <keescook@chromium.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Alexandre Bounine authored
Modify initialization of PCIe capability registers in Tsi721 mport driver: - change Completion Timeout value to avoid unexpected data transfer aborts during intensive traffic. - replace hardcoded offset of PCIe capability block by making it use the common function. This patch is applicable to kernel versions starting from 3.2-rc1. Signed-off-by:
Alexandre Bounine <alexandre.bounine@idt.com> Cc: Matt Porter <mporter@kernel.crashing.org> Signed-off-by:
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Alexandre Bounine authored
Bug fix for Tsi721 RapidIO mport driver: Tsi721 supports four RapidIO mailboxes (MBOX0 - MBOX3) as defined by RapidIO specification. Mailbox resources has to be properly reported to allow use of all available mailboxes (initial version reports only MBOX0). This patch is applicable to kernel versions staring from 3.2-rc1. Signed-off-by:
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Alexandre Bounine authored
Replace the pair dma_alloc_coherent()+memset() with the new dma_zalloc_coherent() added by Andrew Morton for kernel version 3.2 Signed-off-by:
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Michal Hocko authored
Since commit a25cac51 ("proc: Consider NO_HZ when printing idle and iowait times") we are reporting idle/io_wait time also while a CPU is tickless. We rely on get_{idle,iowait}_time functions to retrieve proper data. These functions, however, use usecs_to_cputime to translate micro seconds time to cputime64_t. This is just an alias to usecs_to_jiffies which reduces the data type from u64 to unsigned int and also checks whether the given parameter overflows jiffies_to_usecs(MAX_JIFFY_OFFSET) and returns MAX_JIFFY_OFFSET in that case. When we overflow depends on CONFIG_HZ but especially for CONFIG_HZ_300 it is quite low (1431649781) so we are getting MAX_JIFFY_OFFSET for >3000s! until we overflow unsigned int. Just for reference CONFIG_HZ_100 has an overflow window around 20s, CONFIG_HZ_250 ~8s and CONFIG_HZ_1000 ~2s. This results in a bug when people saw [h]top going mad reporting 100% CPU usage even though there was basically no CPU load. The reason was simply that /proc/stat stopped reporting idle/io_wait changes (and reported MAX_JIFFY_OFFSET) and so the only change happening was for user system time. Let's use nsecs_to_jiffies64 instead which doesn't reduce the precision to 32b type and it is much more appropriate for cumulative time values (unlike usecs_to_jiffies which intended for timeout calculations). Signed-off-by:
Michal Hocko <mhocko@suse.cz> Tested-by:
Artem S. Tashkinov <t.artem@mailcity.com> Cc: Dave Jones <davej@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Mel Gorman authored
Commit f5252e00 ("mm: avoid null pointer access in vm_struct via /proc/vmallocinfo") adds newly allocated vm_structs to the vmlist after it is fully initialised. Unfortunately, it did not check that __vmalloc_area_node() successfully populated the area. In the event of allocation failure, the vmalloc area is freed but the pointer to freed memory is inserted into the vmlist leading to a a crash later in get_vmalloc_info(). This patch adds a check for ____vmalloc_area_node() failure within __vmalloc_node_range. It does not use "goto fail" as in the previous error path as a warning was already displayed by __vmalloc_area_node() before it called vfree in its failure path. Credit goes to Luciano Chavez for doing all the real work of identifying exactly where the problem was. Signed-off-by:
Mel Gorman <mgorman@suse.de> Reported-by:
Luciano Chavez <lnx1138@linux.vnet.ibm.com> Tested-by:
Rik van Riel <riel@redhat.com> Acked-by:
David Rientjes <rientjes@google.com> Cc: <stable@vger.kernel.org> [3.1.x+] Signed-off-by:
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Michal Hocko authored
setup_zone_migrate_reserve() expects that zone->start_pfn starts at pageblock_nr_pages aligned pfn otherwise we could access beyond an existing memblock resulting in the following panic if CONFIG_HOLES_IN_ZONE is not configured and we do not check pfn_valid: IP: [<c02d331d>] setup_zone_migrate_reserve+0xcd/0x180 *pdpt = 0000000000000000 *pde = f000ff53f000ff53 Oops: 0000 [#1] SMP Pid: 1, comm: swapper Not tainted 3.0.7-0.7-pae #1 VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform EIP: 0060:[<c02d331d>] EFLAGS: 00010006 CPU: 0 EIP is at setup_zone_migrate_reserve+0xcd/0x180 EAX: 000c0000 EBX: f5801fc0 ECX: 000c0000 EDX: 00000000 ESI: 000c01fe EDI: 000c01fe EBP: 00140000 ESP: f2475f58 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 Process swapper (pid: 1, ti=f2474000 task=f2472cd0 task.ti=f2474000) Call Trace: [<c02d389c>] __setup_per_zone_wmarks+0xec/0x160 [<c02d3a1f>] setup_per_zone_wmarks+0xf/0x20 [<c08a771c>] init_per_zone_wmark_min+0x27/0x86 [<c020111b>] do_one_initcall+0x2b/0x160 [<c086639d>] kernel_init+0xbe/0x157 [<c05cae26>] kernel_thread_helper+0x6/0xd Code: a5 39 f5 89 f7 0f 46 fd 39 cf 76 40 8b 03 f6 c4 08 74 32 eb 91 90 89 c8 c1 e8 0e 0f be 80 80 2f 86 c0 8b 14 85 60 2f 86 c0 89 c8 <2b> 82 b4 12 00 00 c1 e0 05 03 82 ac 12 00 00 8b 00 f6 c4 08 0f EIP: [<c02d331d>] setup_zone_migrate_reserve+0xcd/0x180 SS:ESP 0068:f2475f58 CR2: 00000000000012b4 We crashed in pageblock_is_reserved() when accessing pfn 0xc0000 because highstart_pfn = 0x36ffe. The issue was introduced in 3.0-rc1 by 6d3163ce ("mm: check if any page in a pageblock is reserved before marking it MIGRATE_RESERVE"). Make sure that start_pfn is always aligned to pageblock_nr_pages to ensure that pfn_valid s always called at the start of each pageblock. Architectures with holes in pageblocks will be correctly handled by pfn_valid_within in pageblock_is_reserved. Signed-off-by:
Dang Bo <bdang@vmware.com> Reviewed-by:
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: David Rientjes <rientjes@google.com> Cc: Arve Hjnnevg <arve@android.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: John Stultz <john.stultz@linaro.org> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: <stable@vger.kernel.org> [3.0+] Signed-off-by:
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Hillf Danton authored
Avoid unlocking and unlocked page if we failed to lock it. Signed-off-by:
Hillf Danton <dhillf@gmail.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by:
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Youquan Song authored
Commit 70b50f94 ("mm: thp: tail page refcounting fix") keeps all page_tail->_count zero at all times. But the current kernel does not set page_tail->_count to zero if a 1GB page is utilized. So when an IOMMU 1GB page is used by KVM, it wil result in a kernel oops because a tail page's _count does not equal zero. kernel BUG at include/linux/mm.h:386! invalid opcode: 0000 [#1] SMP Call Trace: gup_pud_range+0xb8/0x19d get_user_pages_fast+0xcb/0x192 ? trace_hardirqs_off+0xd/0xf hva_to_pfn+0x119/0x2f2 gfn_to_pfn_memslot+0x2c/0x2e kvm_iommu_map_pages+0xfd/0x1c1 kvm_iommu_map_memslots+0x7c/0xbd kvm_iommu_map_guest+0xaa/0xbf kvm_vm_ioctl_assigned_device+0x2ef/0xa47 kvm_vm_ioctl+0x36c/0x3a2 do_vfs_ioctl+0x49e/0x4e4 sys_ioctl+0x5a/0x7c system_call_fastpath+0x16/0x1b RIP gup_huge_pud+0xf2/0x159 Signed-off-by:
Youquan Song <youquan.song@intel.com> Reviewed-by:
Andrea Arcangeli <aarcange@redhat.com> Cc: <stable@vger.kernel.org> Signed-off-by:
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Youquan Song authored
With the 3.2-rc kernel, IOMMU 2M pages in KVM works. But when I tried to use IOMMU 1GB pages in KVM, I encountered an oops and the 1GB page failed to be used. The root cause is that 1GB page allocation calls gup_huge_pud() while 2M page calls gup_huge_pmd. If compound pages are used and the page is a tail page, gup_huge_pmd() increases _mapcount to record tail page are mapped while gup_huge_pud does not do that. So when the mapped page is relesed, it will result in kernel oops because the page is not marked mapped. This patch add tail process for compound page in 1GB huge page which keeps the same process as 2M page. Reproduce like: 1. Add grub boot option: hugepagesz=1G hugepages=8 2. mount -t hugetlbfs -o pagesize=1G hugetlbfs /dev/hugepages 3. qemu-kvm -m 2048 -hda os-kvm.img -cpu kvm64 -smp 4 -mem-path /dev/hugepages -net none -device pci-assign,host=07:00.1 kernel BUG at mm/swap.c:114! invalid opcode: 0000 [#1] SMP Call Trace: put_page+0x15/0x37 kvm_release_pfn_clean+0x31/0x36 kvm_iommu_put_pages+0x94/0xb1 kvm_iommu_unmap_memslots+0x80/0xb6 kvm_assign_device+0xba/0x117 kvm_vm_ioctl_assigned_device+0x301/0xa47 kvm_vm_ioctl+0x36c/0x3a2 do_vfs_ioctl+0x49e/0x4e4 sys_ioctl+0x5a/0x7c system_call_fastpath+0x16/0x1b RIP put_compound_page+0xd4/0x168 Signed-off-by: -
Peter Zijlstra authored
Commit 4f2a8d3c ("printk: Fix console_sem vs logbuf_lock unlock race") introduced another silly bug where we would want to acquire an already held lock. Avoid this. Reported-by:
Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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KAMEZAWA Hiroyuki authored
More players joined to memory cgroup developments and Johannes' great work changed internal design of memory cgroup dramatically. And he will do more works. Michal Hokko did many bug fixes and know memory cgroup very well. Daisuke Nishimura helped us very much but he seems busy now. Thanks to his works. Signed-off-by:
Johannes Weiner <hannes@cmpxchg.org> Acked-by:
Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <bsingharora@gmail.com> Signed-off-by:
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Jonghwan Choi authored
If an error occurs after the clock is enabled, the enable/disable state can become unbalanced. Signed-off-by:
Jonghwan Choi <jhbird.choi@samsung.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Acked-by:
Kukjin Kim <kgene.kim@samsung.com> Cc: <stable@vger.kernel.org> Signed-off-by:
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Kees Cook authored
Small clean-up for my CREDITS entry; the GPG fingerprint was not up to date, so I fixed other details at the same time too. Signed-off-by:
Kees Cook <kees@outflux.net> Signed-off-by:
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Andrea Arcangeli authored
khugepaged can sometimes cause suspend to fail, requiring that the user retry the suspend operation. Use wait_event_freezable_timeout() instead of schedule_timeout_interruptible() to avoid missing freezer wakeups. A try_to_freeze() would have been needed in the khugepaged_alloc_hugepage tight loop too in case of the allocation failing repeatedly, and wait_event_freezable_timeout will provide it too. khugepaged would still freeze just fine by trying again the next minute but it's better if it freezes immediately. Reported-by:
Jiri Slaby <jslaby@suse.cz> Signed-off-by:
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Claudio Scordino authored
Fix the error message "directives may not be used inside a macro argument" which appears when the kernel is compiled for the cris architecture. Signed-off-by:
Claudio Scordino <claudio@evidence.eu.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: <stable@vger.kernel.org> Signed-off-by:
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Konstantin Khlebnikov authored
Use atomic-long operations instead of looping around cmpxchg(). [akpm@linux-foundation.org: massage atomic.h inclusions] Signed-off-by:
Konstantin Khlebnikov <khlebnikov@openvz.org> Cc: Dave Chinner <david@fromorbit.com> Signed-off-by:
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Konstantin Khlebnikov authored
A shrinker function can return -1, means that it cannot do anything without a risk of deadlock. For example prune_super() does this if it cannot grab a superblock refrence, even if nr_to_scan=0. Currently we interpret this -1 as a ULONG_MAX size shrinker and evaluate `total_scan' according to this. So the next time around this shrinker can cause really big pressure. Let's skip such shrinkers instead. Also make total_scan signed, otherwise the check (total_scan < 0) below never works. Signed-off-by:
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- 08 Dec, 2011 15 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: alarmtimers: Fix time comparison ptp: Fix clock_getres() implementation
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git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfsLinus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: Btrfs: drop spin lock when memory alloc fails Btrfs: check if the to-be-added device is writable Btrfs: try cluster but don't advance in search list Btrfs: try to allocate from cluster even at LOOP_NO_EMPTY_SIZE
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-socLinus Torvalds authored
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (28 commits) ARM: sa1100: fix build error ARM: OMAP1: recalculate loops per jiffy after dpll1 reprogram ARM: davinci: dm365 evm: align nand partition table to u-boot ARM: davinci: da850 evm: change audio edma event queue to EVENTQ_0 ARM: davinci: dm646x evm: wrong register used in setup_vpif_input_channel_mode ARM: davinci: dm646x does not have a DSP domain ARM: davinci: psc: fix incorrect offsets ARM: davinci: psc: fix incorrect mask ARM: mx28: LRADC macro rename arm: mx23: recognise stmp378x as mx23 ARM: mxs: fix machines' initializers order ARM: mxs/tx28: add __initconst for fec pdata ARM: S3C64XX: Staticise s3c6400_sysclass ARM: S3C64XX: Add linux/export.h to dev-spi.c ARM: S3C64XX: Remove extern from definition of framebuffer setup call MAINTAINERS: Extend Samsung patterns to cover SPI and ASoC drivers MAINTAINERS: Add linux-samsung-soc mailing list for Samsung MAINTAINERS: Consolidate Samsung MAINTAINERS ARM: CSR: PM: fix build error due to undeclared 'THIS_MODULE' ARM: CSR: fix build error due to new mdesc->dma_zone_size ...
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Tetsuo Handa authored
Current tomoyo_realpath_from_path() implementation returns strange pathname when calculating pathname of a file which belongs to lazy unmounted tree. Use local pathname rather than strange absolute pathname in that case. Also, this patch fixes a regression by commit 02125a82 "fix apparmor dereferencing potentially freed dentry, sanitize __d_path() API". Signed-off-by:
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Cc: stable@vger.kernel.org Signed-off-by:
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Liu Bo authored
Drop spin lock in convert_extent_bit() when memory alloc fails, otherwise, it will be a deadlock. Signed-off-by:
Liu Bo <liubo2009@cn.fujitsu.com> Signed-off-by:
Chris Mason <chris.mason@oracle.com>
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Li Zefan authored
If we call ioctl(BTRFS_IOC_ADD_DEV) directly, we'll succeed in adding a readonly device to a btrfs filesystem, and btrfs will write to that device, emitting kernel errors: [ 3109.833692] lost page write due to I/O error on loop2 [ 3109.833720] lost page write due to I/O error on loop2 ... Signed-off-by:
Li Zefan <lizf@cn.fujitsu.com> Signed-off-by:
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Alexandre Oliva authored
When we find an existing cluster, we switch to its block group as the current block group, possibly skipping multiple blocks in the process. Furthermore, under heavy contention, multiple threads may fail to allocate from a cluster and then release just-created clusters just to proceed to create new ones in a different block group. This patch tries to allocate from an existing cluster regardless of its block group, and doesn't switch to that group, instead proceeding to try to allocate a cluster from the group it was iterating before the attempt. Signed-off-by:
Alexandre Oliva <oliva@lsd.ic.unicamp.br> Signed-off-by:
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Jett.Zhou authored
arm-eabi-4.4.3-ld:--defsym zreladdr=: syntax error make[2]: *** [arch/arm/boot/compressed/vmlinux] Error 1 make[1]: *** [arch/arm/boot/compressed/vmlinux] Error 2 make: *** [uImage] Error 2 Signed-off-by:
Haojian Zhuang <haojian.zhuang@gmail.com> Signed-off-by:
Jett.Zhou <jtzhou@marvell.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pendingLinus Torvalds authored
* '3.2-rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (25 commits) iscsi-target: Fix hex2bin warn_unused compile message target: Don't return an error if disabling unsupported features target/rd: fix or rewrite the copy routine target/rd: simplify the page/offset computation target: remove the unused se_dev_list target/file: walk properly over sg list target: remove unused struct fields target: Fix page length in emulated INQUIRY VPD page 86h target: Handle 0 correctly in transport_get_sectors_6() target: Don't return an error status for 0-length READ and WRITE iscsi-target: Use kmemdup rather than duplicating its implementation iscsi-target: Add missing F_BIT for iscsi_tm_rsp iscsi-target: Fix residual count hanlding + remove iscsi_cmd->residual_count target: Reject SCSI data overflow for fabrics using transport_generic_map_mem_to_cmd target: remove the unused t_task_pt_sgl and t_task_pt_sgl_num se_cmd fields target: remove the t_tasks_bidi se_cmd field target: remove the t_tasks_fua se_cmd field target: remove the se_ordered_node se_cmd field target: remove the se_obj_ptr and se_orig_obj_ptr se_cmd fields target: Drop config_item_name usage in fabric TFO->free_wwn() ...
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Alexandre Oliva authored
If we reach LOOP_NO_EMPTY_SIZE, we won't even try to use a cluster that others might have set up. Odds are that there won't be one, but if someone else succeeded in setting it up, we might as well use it, even if we don't try to set up a cluster again. Signed-off-by:
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git://oss.sgi.com/xfs/xfsLinus Torvalds authored
* 'for-linus' of git://oss.sgi.com/xfs/xfs: xfs: fix the logspace waiting algorithm xfs: fix nfs export of 64-bit inodes numbers on 32-bit kernels xfs: fix allocation length overflow in xfs_bmapi_write()
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pmLinus Torvalds authored
* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: PM / Driver core: leave runtime PM enabled during system shutdown
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git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68kLinus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k: Wire up process_vm_{read,write}v
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- 07 Dec, 2011 6 commits
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git://github.com/acmel/linuxIngo Molnar authored
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Alan Stern authored
Disabling all runtime PM during system shutdown turns out not to be a good idea, because some devices may need to be woken up from a low-power state at that time. The whole point of disabling runtime PM for system shutdown was to prevent untimely runtime-suspend method calls. This patch (as1504) accomplishes the same result by incrementing the usage count for each device and waiting for ongoing runtime-PM callbacks to finish. This is what we already do during system suspend and hibernation, which makes sense since the shutdown method is pretty much a legacy analog of the pm->poweroff method. This fixes a recent regression on some OMAP systems introduced by commit af8db150 (PM / driver core: disable device's runtime PM during shutdown). Reported-and-tested-by:
NeilBrown <neilb@suse.de> Signed-off-by:
Alan Stern <stern@rowland.harvard.edu> Acked-by:
Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by:
Rafael J. Wysocki <rjw@sisk.pl>
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Anton Vorontsov authored
PPC32/64 defines NO_IRQ to zero, so no problems expected. ARM defines NO_IRQ to -1, but OF code relies on IRQ domains support, which returns correct ('0') value in 'no irq' case. So everything should be fine. Other arches might break if some of their OF drivers rely on NO_IRQ being not 0. If so, the drivers must be fixed, finally. [ Rob Herring points out that microblaze should be fixed, and has posted a patch for testing for that. - Linus ] Signed-off-by:Anton Vorontsov <anton.vorontsov@linaro.org> Acked-by:
Wolfram Sang <w.sang@pengutronix.de> Signed-off-by:
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git://people.freedesktop.org/~airlied/linuxLinus Torvalds authored
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: vmwgfx: Use kcalloc instead of kzalloc to allocate array drm/i915: fix infinite recursion on unbind due to ilk vt-d w/a drm/radeon/kms: fix return type for radeon_encoder_get_dp_bridge_encoder_id
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: fix apparmor dereferencing potentially freed dentry, sanitize __d_path() API
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Gleb Natapov authored
perf_event_sched_in() shouldn't try to schedule task events if there are none otherwise task's ctx->is_active will be set and will not be cleared during sched_out. This will prevent newly added events from being scheduled into the task context. Fixes a boo-boo in commit 1d5f003f ("perf: Do not set task_ctx pointer in cpuctx if there are no events in the context"). Signed-off-by:
Gleb Natapov <gleb@redhat.com> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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