linux/fs/ext4
Curt Wohlgemuth b43d17f319 ext4: don't release page refs in ext4_end_bio()
We can clear PageWriteback on each page when the IO
completes, but we can't release the references on the page
until we convert any uninitialized extents.

Without this patch, the use of the dioread_nolock mount
option can break buffered writes, because extents may
not be converted by the time a subsequent buffered read
comes in; if the page is not in the page cache, a read
will return zeros if the extent is still uninitialized.

I tested this with a (temporary) patch that adds a call
to msleep(1000) at the start of ext4_end_io_work(), to delay
processing of each DIO-unwritten work queue item.  With this
msleep(), a simple workload of

  fallocate
  write
  fadvise
  read

will fail without this patch, succeeds with it.

Signed-off-by: Curt Wohlgemuth <curtw@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2012-03-05 10:40:15 -05:00
..
acl.c switch posix_acl_equiv_mode() to umode_t * 2011-08-01 02:10:06 -04:00
acl.h fs: take the ACL checks to common code 2011-07-25 14:30:23 -04:00
balloc.c ext4: fix balloc.c printk-format-warning 2012-02-20 17:57:24 -05:00
bitmap.c ext4: Change unsigned long to unsigned int 2008-11-05 00:14:04 -05:00
block_validity.c ext2/3/4: delete unneeded includes of module.h 2012-01-09 13:52:10 +01:00
dir.c ext4: remove an unneeded NULL check in __ext4_check_dir_entry() 2012-02-20 17:53:05 -05:00
ext4_extents.h ext4: Fix bigalloc quota accounting and i_blocks value 2011-09-09 19:04:51 -04:00
ext4_jbd2.c jbd2: add debugging information to jbd2_journal_dirty_metadata() 2011-09-04 10:18:14 -04:00
ext4_jbd2.h ext4: expand commit callback and 2012-02-20 17:53:02 -05:00
ext4.h ext4: fix race between sync and completed io work 2012-03-05 10:29:52 -05:00
extents.c Merge branch 'for_linus' into for_linus_merged 2012-01-10 11:54:07 -05:00
file.c Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 2011-11-02 10:06:20 -07:00
fsync.c ext4: fix race between sync and completed io work 2012-03-05 10:29:52 -05:00
hash.c ext4: Add support for non-native signed/unsigned htree hash algorithms 2008-10-28 13:21:44 -04:00
ialloc.c ext4: fix race when setting bitmap_uptodate flag 2012-02-20 17:52:46 -05:00
indirect.c ext2/3/4: delete unneeded includes of module.h 2012-01-09 13:52:10 +01:00
inode.c ext4: clean up the flags passed to __blockdev_direct_IO 2012-03-05 10:19:52 -05:00
ioctl.c Merge branch 'for_linus' into for_linus_merged 2012-01-10 11:54:07 -05:00
Kconfig ext4: Don't ask about supporting ext2/3 in ext4 if ext4 is not configured 2009-12-21 10:54:09 -05:00
Makefile ext4: move ext4_ind_* functions from inode.c to indirect.c 2011-06-27 19:40:50 -04:00
mballoc.c ext4: remove EXT4_MB_{BITMAP,BUDDY} macros 2012-02-20 17:54:06 -05:00
mballoc.h ext4: remove EXT4_MB_{BITMAP,BUDDY} macros 2012-02-20 17:54:06 -05:00
migrate.c ext4: using PTR_ERR() on the wrong variable in ext4_ext_migrate() 2012-02-20 17:53:06 -05:00
mmp.c ext4: Fix endianness bug when reading the MMP block 2012-02-27 01:09:03 -05:00
move_extent.c ext4: add some tracepoints in ext4/extents.c 2011-09-09 19:18:51 -04:00
namei.c ext4: format flag in dx_probe() 2012-02-20 23:09:36 -05:00
page-io.c ext4: don't release page refs in ext4_end_bio() 2012-03-05 10:40:15 -05:00
resize.c ext4: fix resize when resizing within single group 2012-02-20 23:02:06 -05:00
super.c ext4: try to deprecate noacl and noxattr_user mount options 2012-03-04 22:06:20 -05:00
symlink.c ext4: symlink must be handled via filesystem specific operation 2010-05-16 02:00:00 -04:00
truncate.h ext4: move common truncate functions to header file 2011-06-27 19:16:04 -04:00
xattr_security.c Merge branch 'for_linus' into for_linus_merged 2012-01-10 11:54:07 -05:00
xattr_trusted.c ext2/3/4: delete unneeded includes of module.h 2012-01-09 13:52:10 +01:00
xattr_user.c ext2/3/4: delete unneeded includes of module.h 2012-01-09 13:52:10 +01:00
xattr.c ext4: avoid deadlock on sync-mounted FS w/o journal 2012-02-20 23:06:18 -05:00
xattr.h fs/vfs/security: pass last path component to LSM on inode creation 2011-02-01 11:12:29 -05:00