Eric Lee / smarc-fsl-linux-kernel

09 May, 2007

7 commits

  • a7bc02f4f   trivial: s/i_sem /i_mutex/ ... Browse Code »

    This patch substitutes i_sem by i_mutex in
    Documentation/filesystems/Locking.
    The patch also removes a couple of trailing white-spaces.

    Signed-off-by: Artem Bityutskiy
    Signed-off-by: Adrian Bunk

    Artem Bityutskiy
     
  • a982ac06b   misc doc and kconfig typos ... Browse Code »

    Fix various typos in kernel docs and Kconfigs, 2.6.21-rc4.

    Signed-off-by: Matt LaPlante
    Signed-off-by: Adrian Bunk

    Matt LaPlante
     
  • 8b60756a6   Fix more "deprecated" spellos. ... Browse Code »

    Signed-off-by: Randy Dunlap
    Signed-off-by: Adrian Bunk

    Randy Dunlap
     
  • 18062a91d   Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6 ... Browse Code »

    * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy/jfs-2.6:
    JFS: Fix race waking up jfsIO kernel thread
    JFS: use __set_current_state()
    Copy i_flags to jfs inode flags on write
    JFS: document uid, gid, and umask mount options in jfs.txt

    Linus Torvalds
     
  • 28ec039c2   fat: don't use free_clusters for fat32 ... Browse Code »

    It seems that the recent Windows changed specification, and it's
    undocumented. Windows doesn't update ->free_clusters correctly.

    This patch doesn't use ->free_clusters by default. (instead, add "usefree"
    for forcing to use it)

    Signed-off-by: OGAWA Hirofumi
    Cc: Juergen Beisert
    Cc: Andreas Schwab
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    OGAWA Hirofumi
     
  • c23fbb6bc   VFS: delay the dentry name generation on sockets and pipes ... Browse Code »

    1) Introduces a new method in 'struct dentry_operations'. This method
    called d_dname() might be called from d_path() to build a pathname for
    special filesystems. It is called without locks.

    Future patches (if we succeed in having one common dentry for all
    pipes/sockets) may need to change prototype of this method, but we now
    use : char *d_dname(struct dentry *dentry, char *buffer, int buflen);

    2) Adds a dynamic_dname() helper function that eases d_dname() implementations

    3) Defines d_dname method for sockets : No more sprintf() at socket
    creation. This is delayed up to the moment someone does an access to
    /proc/pid/fd/...

    4) Defines d_dname method for pipes : No more sprintf() at pipe
    creation. This is delayed up to the moment someone does an access to
    /proc/pid/fd/...

    A benchmark consisting of 1.000.000 calls to pipe()/close()/close() gives a
    *nice* speedup on my Pentium(M) 1.6 Ghz :

    3.090 s instead of 3.450 s

    Signed-off-by: Eric Dumazet
    Acked-by: Christoph Hellwig
    Acked-by: Linus Torvalds
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Eric Dumazet
     
  • 5096add84   proc: maps protection ... Browse Code »

    The /proc/pid/ "maps", "smaps", and "numa_maps" files contain sensitive
    information about the memory location and usage of processes. Issues:

    - maps should not be world-readable, especially if programs expect any
    kind of ASLR protection from local attackers.
    - maps cannot just be 0400 because "-D_FORTIFY_SOURCE=2 -O2" makes glibc
    check the maps when %n is in a *printf call, and a setuid(getuid())
    process wouldn't be able to read its own maps file. (For reference
    see http://lkml.org/lkml/2006/1/22/150)
    - a system-wide toggle is needed to allow prior behavior in the case of
    non-root applications that depend on access to the maps contents.

    This change implements a check using "ptrace_may_attach" before allowing
    access to read the maps contents. To control this protection, the new knob
    /proc/sys/kernel/maps_protect has been added, with corresponding updates to
    the procfs documentation.

    [akpm@linux-foundation.org: build fixes]
    [akpm@linux-foundation.org: New sysctl numbers are old hat]
    Signed-off-by: Kees Cook
    Cc: Arjan van de Ven
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Kees Cook
     

08 May, 2007

1 commit

  • b813e931b   smaps: add clear_refs file to clear reference ... Browse Code »

    Adds /proc/pid/clear_refs. When any non-zero number is written to this file,
    pte_mkold() and ClearPageReferenced() is called for each pte and its
    corresponding page, respectively, in that task's VMAs. This file is only
    writable by the user who owns the task.

    It is now possible to measure _approximately_ how much memory a task is using
    by clearing the reference bits with

    echo 1 > /proc/pid/clear_refs

    and checking the reference count for each VMA from the /proc/pid/smaps output
    at a measured time interval. For example, to observe the approximate change
    in memory footprint for a task, write a script that clears the references
    (echo 1 > /proc/pid/clear_refs), sleeps, and then greps for Pgs_Referenced and
    extracts the size in kB. Add the sizes for each VMA together for the total
    referenced footprint. Moments later, repeat the process and observe the
    difference.

    For example, using an efficient Mozilla:

    accumulated time referenced memory
    ---------------- -----------------
    0 s 408 kB
    1 s 408 kB
    2 s 556 kB
    3 s 1028 kB
    4 s 872 kB
    5 s 1956 kB
    6 s 416 kB
    7 s 1560 kB
    8 s 2336 kB
    9 s 1044 kB
    10 s 416 kB

    This is a valuable tool to get an approximate measurement of the memory
    footprint for a task.

    Cc: Hugh Dickins
    Cc: Paul Mundt
    Cc: Christoph Lameter
    Signed-off-by: David Rientjes
    [akpm@linux-foundation.org: build fixes]
    [mpm@selenic.com: rename for_each_pmd]
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    David Rientjes
     

27 Apr, 2007

1 commit

26 Apr, 2007

1 commit

10 Mar, 2007

1 commit

05 Mar, 2007

1 commit

21 Feb, 2007

1 commit

  • 955eff5ac   [PATCH] fs: fix libfs data leak ... Browse Code »

    simple_prepare_write leaks uninitialised kernel data. This happens because
    the it leaves an uninitialised "hole" over the part of the page that the
    write is expected to go to. This is fine, but it then marks the page
    uptodate, which means a concurrent read can come in and copy the
    uninitialised memory into userspace before it written to.

    Fix it by simply marking it uptodate in simple_commit_write instead, after
    the hole has been filled in. This could theoretically break an fs that
    uses simple_prepare_write and not simple_commit_write, and that relies on
    the incorrect simple_prepare_write behaviour. Luckily, none of those
    exists in the tree.

    Signed-off-by: Nick Piggin
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Nick Piggin
     

20 Feb, 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
     

18 Feb, 2007

1 commit

13 Feb, 2007

1 commit

  • cbcae39fa   [PATCH] ufs2 write: mount as rw ... Browse Code »

    These series of patches add UFS2 write-support. UFS2 - is default file system
    for recent versions of FreeBSD.

    The main differences from UFS1 from write support point of view
    are:
    1)Not all inodes are allocated during formatation of disk.
    2)All meta-data(pointer to data blocks) are 64bit(in UFS1 they
    are 32bit).

    So patch series consist of
    1)make possible mount UFS2 in read-write mode
    2)code to write ufs2 inodes and code to initialize inodes chunks.
    3)work with 64bit meta-data

    I made simple testing like create/deleting/writing/reading/truncating, also I
    ran fsx-linux and untar and build kernel on UFS1 and UFS2, after that FreeBSD
    fsck do not find any errors in fs.

    This patch makes possible to mount ufs2 "rw", and updates UFS2 documentation:
    remove note about bug(it fixed by reallocate blocks on the fly patch) and add
    me in the list of people who want receive bug reports.

    Signed-off-by: Evgeniy Dushistov
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Evgeniy Dushistov
     

12 Feb, 2007

1 commit

  • 23c887522   [PATCH] Relay: add CPU hotplug support ... Browse Code »

    Mathieu originally needed to add this for tracing Xen, but it's something
    that's needed for any application that can be tracing while cpus are added.

    unplug isn't supported by this patch. The thought was that at minumum a new
    buffer needs to be added when a cpu comes up, but it wasn't worth the effort
    to remove buffers on cpu down since they'd be freed soon anyway when the
    channel was closed.

    [zanussi@us.ibm.com: avoid lock_cpu_hotplug deadlock]
    Signed-off-by: Mathieu Desnoyers
    Cc: Tom Zanussi
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Mathieu Desnoyers
     

27 Jan, 2007

1 commit

18 Jan, 2007

1 commit

12 Jan, 2007

1 commit

  • e3db7691e   [PATCH] NFS: Fix race in nfs_release_page() ... Browse Code »

    NFS: Fix race in nfs_release_page()

    invalidate_inode_pages2() may find the dirty bit has been set on a page
    owing to the fact that the page may still be mapped after it was locked.
    Only after the call to unmap_mapping_range() are we sure that the page
    can no longer be dirtied.
    In order to fix this, NFS has hooked the releasepage() method and tries
    to write the page out between the call to unmap_mapping_range() and the
    call to remove_mapping(). This, however leads to deadlocks in the page
    reclaim code, where the page may be locked without holding a reference
    to the inode or dentry.

    Fix is to add a new address_space_operation, launder_page(), which will
    attempt to write out a dirty page without releasing the page lock.

    Signed-off-by: Trond Myklebust

    Also, the bare SetPageDirty() can skew all sort of accounting leading to
    other nasties.

    [akpm@osdl.org: cleanup]
    Signed-off-by: Peter Zijlstra
    Cc: Trond Myklebust
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Trond Myklebust
     

31 Dec, 2006

1 commit

14 Dec, 2006

1 commit

08 Dec, 2006

5 commits

  • bcd5625bf   ocfs2: update mount option documentation ... Browse Code »

    We forgot to document the atime_quantum mount option in ocfs2.txt. This adds
    a proper description of how it works.

    Signed-off-by: Tiger Yang
    Signed-off-by: Mark Fasheh

    Tiger Yang
     
  • 3982cd99c   [PATCH] fs/sysv/: doc cleanup ... Browse Code »

    Remove two different changelog files from fs/sysv/ and merges the INTRO
    file into Documentation/filesystems/sysv-fs.txt

    Signed-off-by: Adrian Bunk
    Cc: Christoph Hellwig
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Adrian Bunk
     
  • 70888bd5b   [PATCH] Documentation: remount_fs() needs lock_kernel ... Browse Code »

    Fixed long-lived typo: remount_fs() needs BKL

    Signed-off-by: Vasily Averin
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Vasily Averin
     
  • d80916140   [PATCH] fuse: add blksize option ... Browse Code »

    Add 'blksize' option for block device based filesystems. During
    initialization this is used to set the block size on the device and the super
    block. The default block size is 512bytes.

    Signed-off-by: Miklos Szeredi
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Miklos Szeredi
     
  • d6392f873   [PATCH] fuse: add support for block device based filesystems ... Browse Code »

    I never intended this, but people started using fuse to implement block device
    based "real" filesystems (ntfs-3g, zfs).

    The following four patches add better support for these kinds of filesystems.
    Unlike "normal" fuse filesystems, using this feature should require superuser
    privileges (enforced by the fusermount utility).

    Thanks to Szabolcs Szakacsits for the input and testing.

    This patch adds a 'fuseblk' filesystem type, which is only different from the
    'fuse' filesystem type in how the 'dev_name' mount argument is interpreted.

    Signed-off-by: Miklos Szeredi
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Miklos Szeredi
     

30 Nov, 2006

3 commits

  • 5d3f083d8   Fix typos in /Documentation : Misc ... Browse Code »

    This patch fixes typos in various Documentation txts. The patch addresses some
    misc words.

    Signed-off-by: Matt LaPlante
    Acked-by: Randy Dunlap
    Signed-off-by: Adrian Bunk

    Matt LaPlante
     
  • 4ae0edc21   Fix typos in /Documentation : 'U-Z' ... Browse Code »

    This patch fixes typos in various Documentation txts. The patch addresses some
    +words starting with the letters 'U-Z'.

    Looks like I made it through the alphabet...just in time to start over again
    +too! Maybe I can fit more profound fixes into the next round...? Time will
    +tell. :)

    Signed-off-by: Matt LaPlante
    Acked-by: Randy Dunlap
    Signed-off-by: Adrian Bunk

    Matt LaPlante
     
  • fa00e7e15   Fix typos in /Documentation : 'T'' ... Browse Code »

    This patch fixes typos in various Documentation txts. The patch addresses some
    +words starting with the letter 'T'.

    Signed-off-by: Matt LaPlante
    Acked-by: Randy Dunlap
    Signed-off-by: Adrian Bunk

    Matt LaPlante
     

17 Nov, 2006

1 commit

12 Oct, 2006

1 commit

  • fc513a333   [PATCH] Documentation/filesystems/ext4.txt ... Browse Code »

    This file, ext4.txt, was put together with information from Andrew Morton,
    Andreas Dilger, Suparna Bhattacharya, and Ted Ts'o.

    I copied the mount options, with the exception of "extents", from ext3.txt,
    so if anyone is aware of anything out-of-date, please let me know.

    Signed-off-by: Dave Kleikamp
    Cc: Theodore Ts'o
    Cc: Suparna Bhattacharya
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Dave Kleikamp
     

05 Oct, 2006

1 commit

  • 4a61f1737   Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6 ... Browse Code »

    * git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6: (292 commits)
    [GFS2] Fix endian bug for de_type
    [GFS2] Initialize SELinux extended attributes at inode creation time.
    [GFS2] Move logging code into log.c (mostly)
    [GFS2] Mark nlink cleared so VFS sees it happen
    [GFS2] Two redundant casts removed
    [GFS2] Remove uneeded endian conversion
    [GFS2] Remove duplicate sb reading code
    [GFS2] Mark metadata reads for blktrace
    [GFS2] Remove iflags.h, use FS_
    [GFS2] Fix code style/indent in ops_file.c
    [GFS2] streamline-generic_file_-interfaces-and-filemap gfs fix
    [GFS2] Remove readv/writev methods and use aio_read/aio_write instead (gfs bits)
    [GFS2] inode-diet: Eliminate i_blksize from the inode structure
    [GFS2] inode_diet: Replace inode.u.generic_ip with inode.i_private (gfs)
    [GFS2] Fix typo in last patch
    [GFS2] Fix direct i/o logic in filemap.c
    [GFS2] Fix bug in Makefiles for lock modules
    [GFS2] Remove (extra) fs_subsys declaration
    [GFS2/DLM] Fix trailing whitespace
    [GFS2] Tidy up meta_io code
    ...

    Linus Torvalds
     

04 Oct, 2006

6 commits