linux.git/fs/f2fs/data.c, branch v4.12

f2fs: Make flush bios explicitely sync

2017-05-03T21:30:18+00:00

Commit b685d3d65ac7 "block: treat REQ_FUA and REQ_PREFLUSH as
synchronous" removed REQ_SYNC flag from WRITE_{FUA|PREFLUSH|...}
definitions.  generic_make_request_checks() however strips REQ_FUA and
REQ_PREFLUSH flags from a bio when the storage doesn't report volatile
write cache and thus write effectively becomes asynchronous which can
lead to performance regressions.

Fix the problem by making sure all bios which are synchronous are
properly marked with REQ_SYNC.

Fixes: b685d3d65ac791406e0dfd8779cc9b3707fea5a3
Cc: stable@vger.kernel.org # 4.9+
CC: Jaegeuk Kim 
CC: linux-f2fs-devel@lists.sourceforge.net
Signed-off-by: Jan Kara 
Acked-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: release cp and dnode lock before IPU

2017-05-03T17:04:54+00:00

We don't need to rewrite the page under cp_rwsem and dnode locks.

Signed-off-by: Hou Pengyang 
Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: introduce valid_ipu_blkaddr to clean up

2017-05-03T04:19:48+00:00

This patch introduces valid_ipu_blkaddr to clean up checking block address for
inplace-update.

Signed-off-by: Jaegeuk Kim

f2fs: lookup extent cache first under IPU scenario

2017-05-03T04:19:47+00:00

If a page is cold, NOT atomit written and need_ipu now, there is
a high probability that IPU should be adapted. For IPU, we try to
check extent tree to get the block index first, instead of reading
the dnode page, where may lead to an useless dnode IO, since no need to
update the dnode index for IPU.

Signed-off-by: Hou Pengyang 
Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: reconstruct code to write a data page

2017-05-03T04:19:46+00:00

This patch introduces encrypt_one_page which encrypts one data page before
submit_bio, and change the use of need_inplace_update.

Signed-off-by: Hou Pengyang 
Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: fix out-of free segments

2017-04-24T20:13:23+00:00

This patch also reverts d0db7703ac1 ("f2fs: do SSR in higher priority").

This patch fixes out of free segments caused by many small file creation by
1) mkfs -s 1 2G
2) mount
3) untar
 - preoduce 60000 small files burstly
4) sync
 - flush node pages
 - flush imeta

Here, when we do f2fs_balance_fs, we missed # of imeta blocks, resulting in
skipping to check has_not_enough_free_secs.

Another test is done by
1) mkfs -s 12 2G
2) mount
3) untar
 - preoduce 60000 small files burstly
4) sync
 - flush node pages
 - flush imeta

In this case, this patch also fixes wrong block allocation under large section
size.

Reported-by: William Brana 
Cc: 
Signed-off-by: Jaegeuk Kim

f2fs: introduce async IPU policy

2017-04-19T18:00:46+00:00

This patch introduces an ASYNC IPU policy.

Under senario of large # of async updating(e.g. log writing in Android),
disk would be seriously fragmented, and higher frequent gc would be triggered.

This patch uses IPU to rewrite the async update writting, since async is
NOT sensitive to io latency.

Signed-off-by: Hou Pengyang

f2fs: unlock cp_rwsem early for IPU writes

2017-04-19T18:00:44+00:00

For IPU writes, there won't be any udpates in dnode page since we
will reuse old block address instead of allocating new one, so we
don't need to lock cp_rwsem during IPU IO submitting.

Signed-off-by: Chao Yu

f2fs: fix comment on f2fs_flush_merged_bios() after 86531d6b

2017-04-11T02:48:10+00:00

Callers are to unlock the page on failure after 86531d6b.

Signed-off-by: Tomohiro Kusumi 
Signed-off-by: Jaegeuk Kim

f2fs: submit bio of in-place-update pages

2017-04-05T18:05:07+00:00

This patch tries to split in-place-update bios from sequential bios.

Suggested-by: Yunlei He 
Signed-off-by: Jaegeuk Kim