Eric Sandeen
5b41d92437
ext4: implement writeback livelock avoidance using page tagging ...
This is analogous to Jan Kara's commit,
f446daaea9d4a420d16c606f755f3689dcb2d0ce
mm: implement writeback livelock avoidance using page tagging
but since we forked write_cache_pages, we need to reimplement
it there (and in ext4_da_writepages, since range_cyclic handling
was moved to there)
If you start a large buffered IO to a file, and then set
fsync after it, you'll find that fsync does not complete
until the other IO stops.
If you continue re-dirtying the file (say, putting dd
with conv=notrunc in a loop), when fsync finally completes
(after all IO is done), it reports via tracing that
it has written many more pages than the file contains;
in other words it has synced and re-synced pages in
the file multiple times.
This then leads to problems with our writeback_index
update, since it advances it by pages written, and
essentially sets writeback_index off the end of the
file...
With the following patch, we only sync as much as was
dirty at the time of the sync.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2010-10-27 21:30:13 -04:00
2010-09-13 08:13:03 -05:00
2010-08-09 16:47:39 -04:00
2010-08-09 16:48:51 -04:00
2010-08-13 10:37:30 -07:00
2010-08-09 00:13:34 +02:00
2010-08-11 08:59:06 -07:00
2010-06-16 18:05:05 +02:00
2010-08-09 16:48:53 -04:00
2010-08-10 15:22:42 -07:00
2010-08-12 09:51:35 -07:00
2010-09-17 12:30:31 -07:00
2010-09-14 23:21:03 +00:00
2010-09-19 11:03:09 -07:00
2010-06-04 17:16:29 -04:00
2010-08-18 01:01:33 -04:00
2010-05-19 22:41:57 -04:00
2010-05-21 18:31:12 -04:00
2010-08-05 14:23:45 -05:00
2010-08-27 10:50:53 -05:00
2010-08-11 09:19:43 -07:00
2010-08-09 16:48:45 -04:00
2010-08-10 11:26:52 -07:00
2010-10-27 21:30:13 -04:00
2010-08-18 01:09:01 -04:00
2010-08-10 11:26:52 -07:00
2010-08-12 09:51:35 -07:00
2010-09-07 13:42:41 +02:00
2010-09-17 14:00:10 +01:00
2010-08-09 16:48:37 -04:00
2010-08-09 16:48:37 -04:00
2010-08-18 06:21:10 -04:00
2010-08-09 16:48:17 -04:00
2010-08-09 16:48:16 -04:00
2010-08-09 16:47:49 -04:00
2010-08-11 00:29:47 -04:00
2010-08-18 01:09:01 -04:00
2010-10-27 21:30:04 -04:00
2010-08-10 11:49:21 -07:00
2010-08-10 15:33:09 -07:00
2010-03-30 22:02:32 +09:00
2010-08-14 00:24:24 +02:00
2010-09-09 18:57:25 -07:00
2010-08-10 13:58:28 -07:00
2010-09-12 19:57:50 -04:00
2010-03-30 22:02:32 +09:00
2010-09-12 19:57:50 -04:00
2010-08-30 10:18:03 +09:00
2010-08-27 21:42:11 -04:00
2010-08-09 16:48:37 -04:00
2010-09-23 14:16:53 -07:00
2010-08-10 11:47:36 -07:00
2010-08-13 10:06:55 +02:00
2010-09-22 17:22:39 -07:00
2010-08-09 16:47:31 -04:00
2010-08-10 11:26:52 -07:00
2010-08-09 16:47:39 -04:00
2010-08-18 01:09:01 -04:00
2010-01-26 22:22:26 -05:00
2010-08-09 16:48:00 -04:00
2010-08-08 22:29:33 +00:00
2010-09-03 17:26:28 -07:00
2010-08-11 08:59:23 -07:00
2010-08-10 11:26:52 -07:00
2010-08-10 11:26:52 -07:00
2010-08-18 01:09:01 -04:00
2010-09-10 10:16:54 -05:00
2010-09-22 17:22:39 -07:00
2010-05-27 22:03:05 -04:00
2010-08-09 16:47:39 -04:00
2010-08-14 00:24:24 +02:00
2010-03-30 22:02:32 +09:00
2010-06-01 08:11:06 -07:00
2010-03-06 11:26:46 -08:00
2010-03-30 22:02:32 +09:00
2010-06-29 15:29:31 -07:00
2010-09-09 18:57:24 -07:00
2010-08-17 18:07:43 -07:00
2010-01-29 08:22:01 -08:00
2010-08-23 13:36:59 +02:00
2010-08-07 18:20:39 +02:00
2010-08-11 08:59:18 -07:00
2010-08-18 01:09:01 -04:00
2010-09-22 09:48:47 +02:00
2010-03-06 11:26:45 -08:00
2010-08-14 00:24:24 +02:00
2010-09-22 17:22:38 -07:00
2010-08-18 08:35:48 -04:00
2010-09-09 18:57:22 -07:00
2010-08-09 16:47:44 -04:00
2010-03-30 22:02:32 +09:00
2010-05-11 17:43:58 +02:00
2010-09-10 08:10:26 -07:00
2010-09-09 18:57:25 -07:00
2010-03-30 22:02:32 +09:00
2010-08-18 08:35:48 -04:00
2010-08-11 08:59:02 -07:00
2010-03-30 22:02:32 +09:00
2010-08-18 08:35:46 -04:00
2010-09-22 09:48:47 +02:00
2010-08-18 01:04:22 -04:00
2010-08-10 11:39:13 -07:00
2010-08-18 08:35:48 -04:00
2010-10-27 21:30:11 -04:00
2010-03-30 22:02:32 +09:00
2010-07-20 17:30:22 +02:00
2010-08-09 16:47:39 -04:00
2010-03-08 16:55:37 +01:00
2010-05-21 18:31:17 -04:00
2010-08-18 06:24:41 -04:00
2010-03-30 22:02:32 +09:00
2010-08-18 08:35:48 -04:00
2010-09-07 13:46:20 -07:00
2010-03-03 13:00:21 -05:00
2010-08-18 08:35:47 -04:00
2010-06-10 19:08:34 +02:00
2010-08-18 08:35:48 -04:00
2010-03-03 14:07:55 -05:00
2010-07-28 09:58:32 -04:00
2010-08-09 20:45:05 -07:00
2010-03-12 15:52:32 -08:00
2010-03-07 15:48:26 -08:00
2010-08-11 08:59:20 -07:00
2010-08-07 18:52:56 +02:00
2009-12-17 10:58:17 -05:00
2010-08-13 16:53:13 -07:00
2010-08-09 16:48:44 -04:00
2010-08-18 08:35:48 -04:00
2010-08-09 16:47:43 -04:00
2010-05-20 13:21:42 -07:00
2010-08-13 16:53:13 -07:00
2010-03-30 22:02:32 +09:00
2010-05-21 18:31:18 -04:00
5b41d92437