Eric Lee / smarc-fsl-linux-kernel

16 Apr, 2015

1 commit

09 Oct, 2014

1 commit

16 Nov, 2013

1 commit

28 Feb, 2013

2 commits

26 Feb, 2013

1 commit

  • ecf3d1f1a   vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op ... Browse Code »

    The following set of operations on a NFS client and server will cause

    server# mkdir a
    client# cd a
    server# mv a a.bak
    client# sleep 30 # (or whatever the dir attrcache timeout is)
    client# stat .
    stat: cannot stat `.': Stale NFS file handle

    Obviously, we should not be getting an ESTALE error back there since the
    inode still exists on the server. The problem is that the lookup code
    will call d_revalidate on the dentry that "." refers to, because NFS has
    FS_REVAL_DOT set.

    nfs_lookup_revalidate will see that the parent directory has changed and
    will try to reverify the dentry by redoing a LOOKUP. That of course
    fails, so the lookup code returns ESTALE.

    The problem here is that d_revalidate is really a bad fit for this case.
    What we really want to know at this point is whether the inode is still
    good or not, but we don't really care what name it goes by or whether
    the dcache is still valid.

    Add a new d_op->d_weak_revalidate operation and have complete_walk call
    that instead of d_revalidate. The intent there is to allow for a
    "weaker" d_revalidate that just checks to see whether the inode is still
    good. This is also gives us an opportunity to kill off the FS_REVAL_DOT
    special casing.

    [AV: changed method name, added note in porting, fixed confusion re
    having it possibly called from RCU mode (it won't be)]

    Cc: NeilBrown
    Signed-off-by: Jeff Layton
    Signed-off-by: Al Viro

    Jeff Layton
     

14 Jul, 2012

1 commit

06 Jan, 2012

1 commit

  • 5d3851530   9p: Reduce object size with CONFIG_NET_9P_DEBUG ... Browse Code »

    Reduce object size by deduplicating formats.

    Use vsprintf extension %pV.
    Rename P9_DPRINTK uses to p9_debug, align arguments.
    Add function for _p9_debug and macro to add __func__.
    Add missing "\n"s to p9_debug uses.
    Remove embedded function names as p9_debug adds it.
    Remove P9_EPRINTK macro and convert use to pr_.
    Add and use pr_fmt and pr_.

    $ size fs/9p/built-in.o*
    text data bss dec hex filename
    62133 984 16000 79117 1350d fs/9p/built-in.o.new
    67342 984 16928 85254 14d06 fs/9p/built-in.o.old
    $ size net/9p/built-in.o*
    text data bss dec hex filename
    88792 4148 22024 114964 1c114 net/9p/built-in.o.new
    94072 4148 23232 121452 1da6c net/9p/built-in.o.old

    Signed-off-by: Joe Perches
    Signed-off-by: Eric Van Hensbergen

    Joe Perches
     

16 Apr, 2011

1 commit

15 Mar, 2011

2 commits

13 Jan, 2011

1 commit

  • 98cd3fb0a   switch 9p ... Browse Code »

    here we actually *want* ->d_op for root; setting it allows to get rid
    of kludge in v9fs_kill_super() since now we have proper ->d_release()
    for root and don't need to call it manually.

    Signed-off-by: Al Viro

    Al Viro
     

07 Jan, 2011

1 commit

  • fe15ce446   fs: change d_delete semantics ... Browse Code »

    Change d_delete from a dentry deletion notification to a dentry caching
    advise, more like ->drop_inode. Require it to be constant and idempotent,
    and not take d_lock. This is how all existing filesystems use the callback
    anyway.

    This makes fine grained dentry locking of dput and dentry lru scanning
    much simpler.

    Signed-off-by: Nick Piggin

    Nick Piggin
     

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
     

28 Mar, 2009

1 commit

20 Dec, 2008

1 commit

15 Jul, 2007

1 commit

  • bd238fb43   9p: Reorganization of 9p file system code ... Browse Code »

    This patchset moves non-filesystem interfaces of v9fs from fs/9p to net/9p.
    It moves the transport, packet marshalling and connection layers to net/9p
    leaving only the VFS related files in fs/9p. This work is being done in
    preparation for in-kernel 9p servers as well as alternate 9p clients (other
    than VFS).

    Signed-off-by: Latchesar Ionkov
    Signed-off-by: Eric Van Hensbergen

    Latchesar Ionkov
     

22 May, 2007

1 commit

  • e8edc6e03   Detach sched.h from mm.h ... Browse Code »

    First thing mm.h does is including sched.h solely for can_do_mlock() inline
    function which has "current" dereference inside. By dealing with can_do_mlock()
    mm.h can be detached from sched.h which is good. See below, why.

    This patch
    a) removes unconditional inclusion of sched.h from mm.h
    b) makes can_do_mlock() normal function in mm/mlock.c
    c) exports can_do_mlock() to not break compilation
    d) adds sched.h inclusions back to files that were getting it indirectly.
    e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were
    getting them indirectly

    Net result is:
    a) mm.h users would get less code to open, read, preprocess, parse, ... if
    they don't need sched.h
    b) sched.h stops being dependency for significant number of files:
    on x86_64 allmodconfig touching sched.h results in recompile of 4083 files,
    after patch it's only 3744 (-8.3%).

    Cross-compile tested on

    all arm defconfigs, all mips defconfigs, all powerpc defconfigs,
    alpha alpha-up
    arm
    i386 i386-up i386-defconfig i386-allnoconfig
    ia64 ia64-up
    m68k
    mips
    parisc parisc-up
    powerpc powerpc-up
    s390 s390-up
    sparc sparc-up
    sparc64 sparc64-up
    um-x86_64
    x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig

    as well as my two usual configs.

    Signed-off-by: Alexey Dobriyan
    Signed-off-by: Linus Torvalds

    Alexey Dobriyan
     

09 May, 2007

1 commit

19 Feb, 2007

1 commit

  • e03abc0c9   9p: implement optional loose read cache ... Browse Code »

    While cacheing is generally frowned upon in the 9p world, it has its
    place -- particularly in situations where the remote file system is
    exclusive and/or read-only. The vacfs views of venti content addressable
    store are a real-world instance of such a situation. To facilitate higher
    performance for these workloads (and eventually use the fscache patches),
    we have enabled a "loose" cache mode which does not attempt to maintain
    any form of consistency on the page-cache or dcache. This results in over
    two orders of magnitude performance improvement for cacheable block reads
    in the Bonnie benchmark. The more aggressive use of the dcache also seems
    to improve metadata operational performance.

    Signed-off-by: Eric Van Hensbergen

    Eric Van Hensbergen
     

26 Mar, 2006

2 commits

03 Mar, 2006

1 commit

  • 46f6dac25   [PATCH] v9fs: simplify fid mapping ... Browse Code »

    v9fs has been plagued by an over-complicated approach trying to map Linux
    dentry semantics to Plan 9 fid semantics. Our previous approach called for
    aggressive flushing of the dcache resulting in several problems (including
    wierd cwd behavior when running /bin/pwd).

    This patch dramatically simplifies our handling of this fid management. Fids
    will not be clunked as promptly, but the new approach is more functionally
    correct. We now clunk un-open fids only when their dentry ref_count reaches 0
    (and d_delete is called).

    Another simplification is we no longer seek to match fids to the process-id or
    uid of the action initiator. The uid-matching will need to be revisited when
    we fix the security model.

    Signed-off-by: Eric Van Hensbergen
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Eric Van Hensbergen
     

09 Jan, 2006

2 commits

28 Sep, 2005

1 commit

  • 0b8dd1776   [PATCH] v9fs: fix races in fid allocation ... Browse Code »

    Fid management cleanup. The patch attempts to fix the races in dentry's
    fid management.

    Dentries don't keep the opened fids anymore, they are moved to the file
    structs. Ideally there should be no more than one fid with fidcreate equal
    to zero in the dentry's list of fids.

    v9fs_fid_create initializes the important fields (fid, fidcreated) before
    v9fs_fid is added to the list. v9fs_fid_lookup returns only fids that are
    not created by v9fs_create. v9fs_fid_get_created returns the fid created
    by the same process by v9fs_create (if any) and removes it from dentry's
    list

    Signed-off-by: Latchesar Ionkov
    Cc: Eric Van Hensbergen
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Latchesar Ionkov
     

10 Sep, 2005

1 commit