Eric Lee / smarc-fsl-linux-kernel

10 Mar, 2011

1 commit

  • 7eaceacca   block: remove per-queue plugging ... Browse Code »
    86

    Code has been converted over to the new explicit on-stack plugging,
    and delay users have been converted to use the new API for that.
    So lets kill off the old plugging along with aops->sync_page().

    Signed-off-by: Jens Axboe

    Jens Axboe
     

30 Mar, 2010

1 commit

  • 5a0e3ad6a   include cleanup: Update gfp.h and slab.h includes to prepare for breaking implic… ... Browse Code »

    …it slab.h inclusion from percpu.h

    percpu.h is included by sched.h and module.h and thus ends up being
    included when building most .c files. percpu.h includes slab.h which
    in turn includes gfp.h making everything defined by the two files
    universally available and complicating inclusion dependencies.

    percpu.h -> slab.h dependency is about to be removed. Prepare for
    this change by updating users of gfp and slab facilities include those
    headers directly instead of assuming availability. As this conversion
    needs to touch large number of source files, the following script is
    used as the basis of conversion.

    http://userweb.kernel.org/~tj/misc/slabh-sweep.py

    The script does the followings.

    * Scan files for gfp and slab usages and update includes such that
    only the necessary includes are there. ie. if only gfp is used,
    gfp.h, if slab is used, slab.h.

    * When the script inserts a new include, it looks at the include
    blocks and try to put the new include such that its order conforms
    to its surrounding. It's put in the include block which contains
    core kernel includes, in the same order that the rest are ordered -
    alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
    doesn't seem to be any matching order.

    * If the script can't find a place to put a new include (mostly
    because the file doesn't have fitting include block), it prints out
    an error message indicating which .h file needs to be added to the
    file.

    The conversion was done in the following steps.

    1. The initial automatic conversion of all .c files updated slightly
    over 4000 files, deleting around 700 includes and adding ~480 gfp.h
    and ~3000 slab.h inclusions. The script emitted errors for ~400
    files.

    2. Each error was manually checked. Some didn't need the inclusion,
    some needed manual addition while adding it to implementation .h or
    embedding .c file was more appropriate for others. This step added
    inclusions to around 150 files.

    3. The script was run again and the output was compared to the edits
    from #2 to make sure no file was left behind.

    4. Several build tests were done and a couple of problems were fixed.
    e.g. lib/decompress_*.c used malloc/free() wrappers around slab
    APIs requiring slab.h to be added manually.

    5. The script was run on all .h files but without automatically
    editing them as sprinkling gfp.h and slab.h inclusions around .h
    files could easily lead to inclusion dependency hell. Most gfp.h
    inclusion directives were ignored as stuff from gfp.h was usually
    wildly available and often used in preprocessor macros. Each
    slab.h inclusion directive was examined and added manually as
    necessary.

    6. percpu.h was updated not to include slab.h.

    7. Build test were done on the following configurations and failures
    were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
    distributed build env didn't work with gcov compiles) and a few
    more options had to be turned off depending on archs to make things
    build (like ipr on powerpc/64 which failed due to missing writeq).

    * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
    * powerpc and powerpc64 SMP allmodconfig
    * sparc and sparc64 SMP allmodconfig
    * ia64 SMP allmodconfig
    * s390 SMP allmodconfig
    * alpha SMP allmodconfig
    * um on x86_64 SMP allmodconfig

    8. percpu.h modifications were reverted so that it could be applied as
    a separate patch and serve as bisection point.

    Given the fact that I had only a couple of failures from tests on step
    6, I'm fairly confident about the coverage of this conversion patch.
    If there is a breakage, it's likely to be something in one of the arch
    headers which should be easily discoverable easily on most builds of
    the specific arch.

    Signed-off-by: Tejun Heo <tj@kernel.org>
    Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>

    Tejun Heo
     

16 Sep, 2009

1 commit

  • aa261f549   HWPOISON: Enable .remove_error_page for migration aware file systems ... Browse Code »

    Enable removing of corrupted pages through truncation
    for a bunch of file systems: ext*, xfs, gfs2, ocfs2, ntfs
    These should cover most server needs.

    I chose the set of migration aware file systems for this
    for now, assuming they have been especially audited.
    But in general it should be safe for all file systems
    on the data area that support read/write and truncate.

    Caveat: the hardware error handler does not take i_mutex
    for now before calling the truncate function. Is that ok?

    Cc: tytso@mit.edu
    Cc: hch@infradead.org
    Cc: mfasheh@suse.com
    Cc: aia21@cantab.net
    Cc: hugh.dickins@tiscali.co.uk
    Cc: swhiteho@redhat.com
    Signed-off-by: Andi Kleen

    Andi Kleen
     

05 Aug, 2008

1 commit

06 Feb, 2008

1 commit

  • eebd2aa35   Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user ... Browse Code »

    Simplify page cache zeroing of segments of pages through 3 functions

    zero_user_segments(page, start1, end1, start2, end2)

    Zeros two segments of the page. It takes the position where to
    start and end the zeroing which avoids length calculations and
    makes code clearer.

    zero_user_segment(page, start, end)

    Same for a single segment.

    zero_user(page, start, length)

    Length variant for the case where we know the length.

    We remove the zero_user_page macro. Issues:

    1. Its a macro. Inline functions are preferable.

    2. The KM_USER0 macro is only defined for HIGHMEM.

    Having to treat this special case everywhere makes the
    code needlessly complex. The parameter for zeroing is always
    KM_USER0 except in one single case that we open code.

    Avoiding KM_USER0 makes a lot of code not having to be dealing
    with the special casing for HIGHMEM anymore. Dealing with
    kmap is only necessary for HIGHMEM configurations. In those
    configurations we use KM_USER0 like we do for a series of other
    functions defined in highmem.h.

    Since KM_USER0 is depends on HIGHMEM the existing zero_user_page
    function could not be a macro. zero_user_* functions introduced
    here can be be inline because that constant is not used when these
    functions are called.

    Also extract the flushing of the caches to be outside of the kmap.

    [akpm@linux-foundation.org: fix nfs and ntfs build]
    [akpm@linux-foundation.org: fix ntfs build some more]
    Signed-off-by: Christoph Lameter
    Cc: Steven French
    Cc: Michael Halcrow
    Cc:
    Cc: Steven Whitehouse
    Cc: Trond Myklebust
    Cc: "J. Bruce Fields"
    Cc: Anton Altaparmakov
    Cc: Mark Fasheh
    Cc: David Chinner
    Cc: Michael Halcrow
    Cc: Steven French
    Cc: Steven Whitehouse
    Cc: Trond Myklebust
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Christoph Lameter
     

04 Nov, 2007

1 commit

  • ebab89909   NTFS: Fix read regression. ... Browse Code »

    The regression was caused by:
    commit[a32ea1e1f925399e0d81ca3f7394a44a6dafa12c] Fix read/truncate race

    This causes ntfs_readpage() to be called for a zero i_size inode, which
    failed when the file was compressed and non-resident.

    Thanks a lot to Mike Galbraith for reporting the issue and tracking down
    the commit that caused the regression.

    Looking into it I found three bugs which the patch fixes.

    Signed-off-by: Anton Altaparmakov
    Tested-by: Mike Galbraith
    Signed-off-by: Linus Torvalds

    Anton Altaparmakov
     

13 Oct, 2007

1 commit

  • bfab36e81   NTFS: Fix a mount time deadlock. ... Browse Code »

    Big thanks go to Mathias Kolehmainen for reporting the bug, providing
    debug output and testing the patches I sent him to get it working.

    The fix was to stop calling ntfs_attr_set() at mount time as that causes
    balance_dirty_pages_ratelimited() to be called which on systems with
    little memory actually tries to go and balance the dirty pages which tries
    to take the s_umount semaphore but because we are still in fill_super()
    across which the VFS holds s_umount for writing this results in a
    deadlock.

    We now do the dirty work by hand by submitting individual buffers. This
    has the annoying "feature" that mounting can take a few seconds if the
    journal is large as we have clear it all. One day someone should improve
    on this by deferring the journal clearing to a helper kernel thread so it
    can be done in the background but I don't have time for this at the moment
    and the current solution works fine so I am leaving it like this for now.

    Signed-off-by: Anton Altaparmakov
    Signed-off-by: Linus Torvalds

    Anton Altaparmakov
     

13 May, 2007

1 commit

  • e3bf460f3   ntfs: use zero_user_page ... Browse Code »

    Use zero_user_page() instead of open-coding it.

    [akpm@linux-foundation.org: kmap-type fixes]
    Signed-off-by: Nate Diller
    Acked-by: Anton Altaparmakov
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Nate Diller
     

31 Jan, 2007

1 commit

01 Oct, 2006

1 commit

29 Jun, 2006

1 commit

24 Mar, 2006

1 commit

23 Mar, 2006

2 commits

24 Feb, 2006

1 commit

19 Oct, 2005

1 commit

11 Oct, 2005

1 commit

19 Sep, 2005

2 commits

11 Sep, 2005

1 commit

  • b4012a989   [PATCH] ntfs build fix ... Browse Code »

    *** Warning: "bit_spin_lock" [fs/ntfs/ntfs.ko] undefined!
    *** Warning: "bit_spin_unlock" [fs/ntfs/ntfs.ko] undefined!

    Cc: Anton Altaparmakov
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Andrew Morton
     

09 Sep, 2005

8 commits

17 Aug, 2005

1 commit

25 Jun, 2005

1 commit

05 May, 2005

8 commits

17 Apr, 2005

1 commit

  • 1da177e4c   Linux-2.6.12-rc2 ... Browse Code »

    Initial git repository build. I'm not bothering with the full history,
    even though we have it. We can create a separate "historical" git
    archive of that later if we want to, and in the meantime it's about
    3.2GB when imported into git - space that would just make the early
    git days unnecessarily complicated, when we don't have a lot of good
    infrastructure for it.

    Let it rip!

    Linus Torvalds