Doug / smarc-fsl-linux-kernel

14 Jan, 2011

1 commit

06 Nov, 2010

2 commits

  • 716ce5d4a   slub: Fix build breakage in Documentation/vm ... Browse Code »

    This patch fixes a build breakage introduced by commit
    f5ac4916e9840292edd33c7a52b10364526547f3 ("slub: move slabinfo.c to
    tools/slub/slabinfo.c") that was repoted by Stephen:

    After merging the slab tree, today's linux-next build (x86_64 allmodconfig)
    failed like this:

    gcc: /scratch/sfr/next/Documentation/vm/slabinfo.c: No such file or directory
    gcc: no input files

    Caused by commit f5ac4916e9840292edd33c7a52b10364526547f3 ("slub: move
    slabinfo.c to tools/slub/slabinfo.c"). Missing update to
    Documentation/vm/Makefile?

    Reported-by: Stephen Rothwell
    Signed-off-by: Pekka Enberg

    Pekka Enberg
     
  • 0d24db337   slub: move slabinfo.c to tools/slub/slabinfo.c ... Browse Code »

    We now have a tools directory for these things.

    Reviewed-by: KOSAKI Motohiro
    Acked-by: David Rientjes
    Signed-off-by: Christoph Lameter
    Signed-off-by: Pekka Enberg

    Christoph Lameter
     

27 Oct, 2010

1 commit

  • d65bfacb0   mm: highmem documentation ... Browse Code »

    Document outlining some of the highmem issues, started by me, edited by
    David.

    Signed-off-by: David Howells
    Signed-off-by: Peter Zijlstra
    Acked-by: Chris Metcalf
    Cc: Hugh Dickins
    Cc: Rik van Riel
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: "H. Peter Anvin"
    Cc: Steven Rostedt
    Cc: Russell King
    Cc: Ralf Baechle
    Cc: David Miller
    Cc: Paul Mackerras
    Cc: Benjamin Herrenschmidt
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Peter Zijlstra
     

25 Oct, 2010

1 commit

  • 229aebb87   Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial ... Browse Code »

    * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits)
    Update broken web addresses in arch directory.
    Update broken web addresses in the kernel.
    Revert "drivers/usb: Remove unnecessary return's from void functions" for musb gadget
    Revert "Fix typo: configuation => configuration" partially
    ida: document IDA_BITMAP_LONGS calculation
    ext2: fix a typo on comment in ext2/inode.c
    drivers/scsi: Remove unnecessary casts of private_data
    drivers/s390: Remove unnecessary casts of private_data
    net/sunrpc/rpc_pipe.c: Remove unnecessary casts of private_data
    drivers/infiniband: Remove unnecessary casts of private_data
    drivers/gpu/drm: Remove unnecessary casts of private_data
    kernel/pm_qos_params.c: Remove unnecessary casts of private_data
    fs/ecryptfs: Remove unnecessary casts of private_data
    fs/seq_file.c: Remove unnecessary casts of private_data
    arm: uengine.c: remove C99 comments
    arm: scoop.c: remove C99 comments
    Fix typo configue => configure in comments
    Fix typo: configuation => configuration
    Fix typo interrest[ing|ed] => interest[ing|ed]
    Fix various typos of valid in comments
    ...

    Fix up trivial conflicts in:
    drivers/char/ipmi/ipmi_si_intf.c
    drivers/usb/gadget/rndis.c
    net/irda/irnet/irnet_ppp.c

    Linus Torvalds
     

07 Oct, 2010

1 commit

21 Sep, 2010

1 commit

06 Aug, 2010

1 commit

28 May, 2010

1 commit

  • b9498bfe8   numa: update Documentation/vm/numa, add memoryless node info ... Browse Code »

    Kamezawa Hiroyuki requested documentation for the numa_mem_id() and slab
    related changes. He suggested Documentation/vm/numa for this
    documentation. Looking at this file, it seems to me to be hopelessly out
    of date relative to current Linux NUMA support. At the risk of going down
    a rathole, I have made an attempt to rewrite the doc at a slightly higher
    level [I think] and provide pointers to other in-tree documents and
    out-of-tree man pages that cover the details.

    Let the games begin.

    Signed-off-by: Lee Schermerhorn
    Cc: Tejun Heo
    Cc: Mel Gorman
    Cc: Christoph Lameter
    Cc: Nick Piggin
    Cc: David Rientjes
    Cc: Eric Whitney
    Cc: KAMEZAWA Hiroyuki
    Cc: Ingo Molnar
    Cc: Thomas Gleixner
    Cc: "H. Peter Anvin"
    Cc: "Luck, Tony"
    Cc: Pekka Enberg
    Cc: Randy Dunlap
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Lee Schermerhorn
     

24 May, 2010

1 commit

  • 89bbfb6bf   Documentation/vm: use better value for MAP_HUGETLB ... Browse Code »

    documentation: slightly more correct value for MAP_HUGETLB in map_hugetlb.c

    still not correct for alpha, mips, parisc or xtensa but working out of
    the box in the most common architectures without having to deal with
    complicated macros or including architecture specific headers.

    Signed-off-by: Carlo Marcelo Arenas Belon
    Signed-off-by: Randy Dunlap
    Signed-off-by: Linus Torvalds

    Carlo Marcelo Arenas Belon
     

23 Apr, 2010

1 commit

13 Mar, 2010

1 commit

  • 70bace8c1   Documentation/vm/: split txt and source files ... Browse Code »

    Documentation/vm/:
    Expose example and tool source files in the Documentation/ directory in
    their own files instead of being buried (almost hidden) in readme/txt files.
    This should help to prevent bitrot.

    This will make them more visible/usable to users who may need
    to use them, to developers who may need to test with them, and
    to anyone who would fix/update them if they were more visible.

    Also, if any of these possibly should not be in the kernel tree at
    all, it will be clearer that they are here and we can discuss if
    they should be removed.

    Also build the recently-added map_hugetlb.c.
    Make several functions static to prevent linker warnings.

    Signed-off-by: Randy Dunlap
    Acked-by: Eric B Munson
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Randy Dunlap
     

27 Feb, 2010

1 commit

  • 4c13dd3b4   failslab: add ability to filter slab caches ... Browse Code »

    This patch allow to inject faults only for specific slabs.
    In order to preserve default behavior cache filter is off by
    default (all caches are faulty).

    One may define specific set of slabs like this:
    # mark skbuff_head_cache as faulty
    echo 1 > /sys/kernel/slab/skbuff_head_cache/failslab
    # Turn on cache filter (off by default)
    echo 1 > /sys/kernel/debug/failslab/cache-filter
    # Turn on fault injection
    echo 1 > /sys/kernel/debug/failslab/times
    echo 1 > /sys/kernel/debug/failslab/probability

    Acked-by: David Rientjes
    Acked-by: Akinobu Mita
    Acked-by: Christoph Lameter
    Signed-off-by: Dmitry Monakhov
    Signed-off-by: Pekka Enberg

    Dmitry Monakhov
     

16 Dec, 2009

16 commits

  • fe194d3e1   HWPOISON: Use correct name for MADV_HWPOISON in documentation ... Browse Code »

    Signed-off-by: Andi Kleen

    Andi Kleen
     
  • 4fd466eb4   HWPOISON: add memory cgroup filter ... Browse Code »

    The hwpoison test suite need to inject hwpoison to a collection of
    selected task pages, and must not touch pages not owned by them and
    thus kill important system processes such as init. (But it's OK to
    mis-hwpoison free/unowned pages as well as shared clean pages.
    Mis-hwpoison of shared dirty pages will kill all tasks, so the test
    suite will target all or non of such tasks in the first place.)

    The memory cgroup serves this purpose well. We can put the target
    processes under the control of a memory cgroup, and tell the hwpoison
    injection code to only kill pages associated with some active memory
    cgroup.

    The prerequisite for doing hwpoison stress tests with mem_cgroup is,
    the mem_cgroup code tracks task pages _accurately_ (unless page is
    locked). Which we believe is/should be true.

    The benefits are simplification of hwpoison injector code. Also the
    mem_cgroup code will automatically be tested by hwpoison test cases.

    The alternative interfaces pin-pfn/unpin-pfn can also delegate the
    (process and page flags) filtering functions reliably to user space.
    However prototype implementation shows that this scheme adds more
    complexity than we wanted.

    Example test case:

    mkdir /cgroup/hwpoison

    usemem -m 100 -s 1000 &
    echo `jobs -p` > /cgroup/hwpoison/tasks

    memcg_ino=$(ls -id /cgroup/hwpoison | cut -f1 -d' ')
    echo $memcg_ino > /debug/hwpoison/corrupt-filter-memcg

    page-types -p `pidof init` --hwpoison # shall do nothing
    page-types -p `pidof usemem` --hwpoison # poison its pages

    [AK: Fix documentation]
    [Add fix for problem noticed by Li Zefan ;
    dentry in the css could be NULL]

    CC: KOSAKI Motohiro
    CC: Hugh Dickins
    CC: Daisuke Nishimura
    CC: Balbir Singh
    CC: KAMEZAWA Hiroyuki
    CC: Li Zefan
    CC: Paul Menage
    CC: Nick Piggin
    CC: Andi Kleen
    Signed-off-by: Wu Fengguang
    Signed-off-by: Andi Kleen

    Andi Kleen
     
  • 478c5ffc0   HWPOISON: add page flags filter ... Browse Code »

    When specified, only poison pages if ((page_flags & mask) == value).

    - corrupt-filter-flags-mask
    - corrupt-filter-flags-value

    This allows stress testing of many kinds of pages.

    Strictly speaking, the buddy pages requires taking zone lock, to avoid
    setting PG_hwpoison on a "was buddy but now allocated to someone" page.
    However we can just do nothing because we set PG_locked in the beginning,
    this prevents the page allocator from allocating it to someone. (It will
    BUG() on the unexpected PG_locked, which is fine for hwpoison testing.)

    [AK: Add select PROC_PAGE_MONITOR to satisfy dependency]

    CC: Nick Piggin
    Signed-off-by: Wu Fengguang
    Signed-off-by: Andi Kleen

    Wu Fengguang
     
  • 31d3d3484   HWPOISON: limit hwpoison injector to known page types ... Browse Code »

    __memory_failure()'s workflow is

    set PG_hwpoison
    //...
    unset PG_hwpoison if didn't pass hwpoison filter

    That could kill unrelated process if it happens to page fault on the
    page with the (temporary) PG_hwpoison. The race should be big enough to
    appear in stress tests.

    Fix it by grabbing the page and checking filter at inject time. This
    also avoids the very noisy "Injecting memory failure..." messages.

    - we don't touch madvise() based injection, because the filters are
    generally not necessary for it.
    - if we want to apply the filters to h/w aided injection, we'd better to
    rearrange the logic in __memory_failure() instead of this patch.

    AK: fix documentation, use drain all, cleanups

    CC: Haicheng Li
    Signed-off-by: Wu Fengguang
    Signed-off-by: Andi Kleen

    Wu Fengguang
     
  • 7c116f2b0   HWPOISON: add fs/device filters ... Browse Code »

    Filesystem data/metadata present the most tricky-to-isolate pages.
    It requires careful code review and stress testing to get them right.

    The fs/device filter helps to target the stress tests to some specific
    filesystem pages. The filter condition is block device's major/minor
    numbers:
    - corrupt-filter-dev-major
    - corrupt-filter-dev-minor
    When specified (non -1), only page cache pages that belong to that
    device will be poisoned.

    The filters are checked reliably on the locked and refcounted page.

    Haicheng: clear PG_hwpoison and drop bad page count if filter not OK
    AK: Add documentation

    CC: Haicheng Li
    CC: Nick Piggin
    Signed-off-by: Wu Fengguang
    Signed-off-by: Andi Kleen

    Wu Fengguang
     
  • 847ce401d   HWPOISON: Add unpoisoning support ... Browse Code »

    The unpoisoning interface is useful for stress testing tools to
    reclaim poisoned pages (to prevent OOM)

    There is no hardware level unpoisioning, so this
    cannot be used for real memory errors, only for software injected errors.

    Note that it may leak pages silently - those who have been removed from
    LRU cache, but not isolated from page cache/swap cache at hwpoison time.
    Especially the stress test of dirty swap cache pages shall reboot system
    before exhausting memory.

    AK: Fix comments, add documentation, add printks, rename symbol

    Signed-off-by: Wu Fengguang
    Signed-off-by: Andi Kleen

    Wu Fengguang
     
  • 0e9052eb9   page-types: add standard GPL license header ... Browse Code »

    Signed-off-by: Wu Fengguang
    Signed-off-by: Andi Kleen

    Wu Fengguang
     
  • d0f209f68   ksm: remove unswappable max_kernel_pages ... Browse Code »

    Now that ksm pages are swappable, and the known holes plugged, remove
    mention of unswappable kernel pages from KSM documentation and comments.

    Remove the totalram_pages/4 initialization of max_kernel_pages. In fact,
    remove max_kernel_pages altogether - we can reinstate it if removal turns
    out to break someone's script; but if we later want to limit KSM's memory
    usage, limiting the stable nodes would not be an effective approach.

    Signed-off-by: Hugh Dickins
    Cc: Izik Eidus
    Cc: Andrea Arcangeli
    Cc: Chris Wright
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Hugh Dickins
     
  • 4faf8d950   hugetlb: handle memory hot-plug events ... Browse Code »

    Register per node hstate attributes only for nodes with memory. As
    suggested by David Rientjes.

    With Memory Hotplug, memory can be added to a memoryless node and a node
    with memory can become memoryless. Therefore, add a memory on/off-line
    notifier callback to [un]register a node's attributes on transition
    to/from memoryless state.

    N.B., Only tested build, boot, libhugetlbfs regression.
    i.e., no memory hotplug testing.

    Signed-off-by: Lee Schermerhorn
    Reviewed-by: Andi Kleen
    Acked-by: David Rientjes
    Cc: KAMEZAWA Hiroyuki
    Cc: Lee Schermerhorn
    Cc: Mel Gorman
    Cc: Randy Dunlap
    Cc: Nishanth Aravamudan
    Cc: Adam Litke
    Cc: Andy Whitcroft
    Cc: Eric Whitney
    Cc: Christoph Lameter
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Lee Schermerhorn
     
  • 9b5e5d0fd   hugetlb: use only nodes with memory for huge pages ... Browse Code »

    Register per node hstate sysfs attributes only for nodes with memory.
    Global replacement of 'all online nodes" with "all nodes with memory" in
    mm/hugetlb.c. Suggested by David Rientjes.

    A subsequent patch will handle adding/removing of per node hstate sysfs
    attributes when nodes transition to/from memoryless state via memory
    hotplug.

    NOTE: this patch has not been tested with memoryless nodes.

    Signed-off-by: Lee Schermerhorn
    Reviewed-by: Andi Kleen
    Cc: KAMEZAWA Hiroyuki
    Cc: Mel Gorman
    Cc: Randy Dunlap
    Cc: Nishanth Aravamudan
    Acked-by: David Rientjes
    Cc: Adam Litke
    Cc: Andy Whitcroft
    Cc: Eric Whitney
    Cc: Christoph Lameter
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Lee Schermerhorn
     
  • 267b4c281   hugetlb: update hugetlb documentation for NUMA controls ... Browse Code »

    Update the kernel huge tlb documentation to describe the numa memory
    policy based huge page management. Additionaly, the patch includes a fair
    amount of rework to improve consistency, eliminate duplication and set the
    context for documenting the memory policy interaction.

    Signed-off-by: Lee Schermerhorn
    Acked-by: David Rientjes
    Acked-by: Mel Gorman
    Reviewed-by: Andi Kleen
    Cc: KAMEZAWA Hiroyuki
    Cc: Lee Schermerhorn
    Cc: Randy Dunlap
    Cc: Nishanth Aravamudan
    Cc: Adam Litke
    Cc: Andy Whitcroft
    Cc: Eric Whitney
    Cc: Christoph Lameter
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Lee Schermerhorn
     
  • bb86a7338   page-types: exit early when invoked with -d|--describe ... Browse Code »

    On a system with large amount of memory (256GB), invoking page-types can
    take quite a long time, which is unreasonable considering the user only
    wants a description of the flags:

    # time ./page-types -d 0x10
    0x0000000000000010 ____D_____________________________ dirty

    real 0m34.285s
    user 0m1.966s
    sys 0m32.313s

    This is because we still walk the entire address range.

    Exiting early seems like a reasonble solution:

    # time ./page-types -d 0x10
    0x0000000000000010 ____D_____________________________ dirty

    real 0m0.007s
    user 0m0.001s
    sys 0m0.005s

    Signed-off-by: Alex Chiang
    Cc: Andi Kleen
    Cc: Haicheng Li
    Acked-by: Wu Fengguang
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Alex Chiang
     
  • 9fdcd886a   page-types: whitespace alignment ... Browse Code »

    Align the output when page-type -h is invoked.

    Signed-off-by: Alex Chiang
    Acked-by: Wu Fengguang
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Alex Chiang
     
  • dcfe730c6   page-types: learn to describe flags directly from command line ... Browse Code »

    Teach page-types to describe page flags directly from the command line.

    Why is this useful? For instance, if you're using memory hotplug and see
    this in /var/log/messages:

    kernel: removing from LRU failed 3836dd0/1/1e00000000000010

    It would be nice to decode those page flags without staring at the source.

    Example usage and output:

    # Documentation/vm/page-types -d 0x10
    0x0000000000000010 ____D_____________________________ dirty

    # Documentation/vm/page-types -d anon
    0x0000000000001000 ____________a_____________________ anonymous

    # Documentation/vm/page-types -d anon,0x10
    0x0000000000001010 ____D_______a_____________________ dirty,anonymous

    [achiang@hp.com: documentation]
    Signed-off-by: Alex Chiang
    Signed-off-by: Wu Fengguang
    Cc: Andi Kleen
    Cc: Haicheng Li
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Alex Chiang
     
  • f1327bf18   page-types: unsigned cannot be less than 0 in add_page() ... Browse Code »

    If not signed, testing of the read() return value in this function
    will not work.

    Signed-off-by: Roel Kluin
    Cc: Wu Fengguang
    Cc: Randy Dunlap
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Roel Kluin
     
  • 3428838d8   page-types: constify read only arrays ... Browse Code »

    Signed-off-by: Tommi Rantala
    Cc: Randy Dunlap
    Cc: Wu Fengguang
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Tommi Rantala
     

08 Dec, 2009

1 commit

04 Dec, 2009

2 commits

18 Nov, 2009

1 commit

  • cb20c28a9   Merge branch 'hostprogs-wmissing-prototypes' of git://git.kernel.org/pub/scm/lin… ... Browse Code »

    …ux/kernel/git/josh/linux-misc

    * 'hostprogs-wmissing-prototypes' of git://git.kernel.org/pub/scm/linux/kernel/git/josh/linux-misc:
    Makefile: Add -Wmising-prototypes to HOSTCFLAGS
    oss: Mark loadhex static in hex2hex.c
    dtc: Mark various internal functions static
    dtc: Set "noinput" in the lexer to avoid an unused function
    drm: radeon: Mark several functions static in mkregtable
    arch/sparc/boot/*.c: Mark various internal functions static
    arch/powerpc/boot/addRamDisk.c: Mark several internal functions static
    arch/alpha/boot/tools/objstrip.c: Mark "usage" static
    Documentation/vm/page-types.c: Declare checked_open static
    genksyms: Mark is_reserved_word static
    kconfig: Mark various internal functions static
    kconfig: Make zconf.y work with current bison

    Linus Torvalds
     

16 Nov, 2009

1 commit

29 Oct, 2009

1 commit

08 Oct, 2009

5 commits