diff options
| author | Eric Sandeen <sandeen@sandeen.net> | 2010-08-01 17:33:29 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-13 13:19:51 -0700 |
| commit | c3d0780019022082d59759d4e162a22b5d437efc (patch) | |
| tree | 33f3b24eeeec9e7095af00198c0e840b510dde9b /drivers | |
| parent | 7d9deb060ffb6c6b38414210f1f2589c524ad1d6 (diff) | |
ext4: fix freeze deadlock under IO
commit 437f88cc031ffe7f37f3e705367f4fe1f4be8b0f upstream.
Commit 6b0310fbf087ad6 caused a regression resulting in deadlocks
when freezing a filesystem which had active IO; the vfs_check_frozen
level (SB_FREEZE_WRITE) did not let the freeze-related IO syncing
through. Duh.
Changing the test to FREEZE_TRANS should let the normal freeze
syncing get through the fs, but still block any transactions from
starting once the fs is completely frozen.
I tested this by running fsstress in the background while periodically
snapshotting the fs and running fsck on the result. I ran into
occasional deadlocks, but different ones. I think this is a
fine fix for the problem at hand, and the other deadlocky things
will need more investigation.
Reported-by: Phillip Susi <psusi@cfl.rr.com>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions