linux/fs/jbd2
Jan Kara 229309caeb jbd2: Fix forever sleeping process in do_get_write_access()
In do_get_write_access() we wait on BH_Unshadow bit for buffer to get
from shadow state. The waking code in journal_commit_transaction() has
a bug because it does not issue a memory barrier after the buffer is
moved from the shadow state and before wake_up_bit() is called. Thus a
waitqueue check can happen before the buffer is actually moved from
the shadow state and waiting process may never be woken. Fix the
problem by issuing proper barrier.

Reported-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2011-05-08 19:09:53 -04:00
..
checkpoint.c Merge branch 'next' into upstream-merge 2010-10-27 23:44:47 -04:00
commit.c jbd2: Fix forever sleeping process in do_get_write_access() 2011-05-08 19:09:53 -04:00
journal.c jbd2: fix fsync() tid wraparound bug 2011-05-01 18:16:26 -04:00
Kconfig
Makefile
recovery.c jbd2: move debug message into debug #ifdef 2010-12-18 13:36:33 -05:00
revoke.c Fix common misspellings 2011-03-31 11:26:23 -03:00
transaction.c Fix common misspellings 2011-03-31 11:26:23 -03:00