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fs/mpage.c: forgotten WRITE_SYNC in case of data integrity write 

In case of wbc->sync_mode == WB_SYNC_ALL we need to do data integrity
write, thus mark request as WRITE_SYNC.

akpm: afaict this change will cause the data integrity write bios to be
placed onto the second queue in cfq_io_cq.cfqq[], which presumably results
in special treatment.  The documentation for REQ_SYNC is horrid.

Signed-off-by: Roman Pen <r.peniaev@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Roman Pen 2015-09-15 08:27:25 -06:00 committed by Jens Axboe
parent f75782e4e0
commit 5948edbcbf
1 changed files with 15 additions and 8 deletions
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23
fs/mpage.c
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@ -482,6 +482,7 @@ static int __mpage_writepage(struct page *page, struct writeback_control *wbc,
struct buffer_head map_bh;
loff_t i_size = i_size_read(inode);
int ret = 0;
int wr = (wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC : WRITE);
if (page_has_buffers(page)) {
struct buffer_head *head = page_buffers(page);
@ -590,7 +591,7 @@ page_is_mapped:
* This page will go to BIO. Do we need to send this BIO off first?
*/
if (bio && mpd->last_block_in_bio != blocks[0] - 1)
bio = mpage_bio_submit(WRITE, bio);
bio = mpage_bio_submit(wr, bio);
alloc_new:
if (bio == NULL) {
@ -617,7 +618,7 @@ alloc_new:
wbc_account_io(wbc, page, PAGE_SIZE);
length = first_unmapped << blkbits;
if (bio_add_page(bio, page, length, 0) < length) {
bio = mpage_bio_submit(WRITE, bio);
bio = mpage_bio_submit(wr, bio);
goto alloc_new;
}
@ -627,7 +628,7 @@ alloc_new:
set_page_writeback(page);
unlock_page(page);
if (boundary || (first_unmapped != blocks_per_page)) {
bio = mpage_bio_submit(WRITE, bio);
bio = mpage_bio_submit(wr, bio);
if (boundary_block) {
write_boundary_block(boundary_bdev,
boundary_block, 1 << blkbits);
@ -639,7 +640,7 @@ alloc_new:
confused:
if (bio)
bio = mpage_bio_submit(WRITE, bio);
bio = mpage_bio_submit(wr, bio);
if (mpd->use_writepage) {
ret = mapping->a_ops->writepage(page, wbc);
@ -695,8 +696,11 @@ mpage_writepages(struct address_space *mapping,
};
ret = write_cache_pages(mapping, wbc, __mpage_writepage, &mpd);
if (mpd.bio)
mpage_bio_submit(WRITE, mpd.bio);
if (mpd.bio) {
int wr = (wbc->sync_mode == WB_SYNC_ALL ?
WRITE_SYNC : WRITE);
mpage_bio_submit(wr, mpd.bio);
}
}
blk_finish_plug(&plug);
return ret;
@ -713,8 +717,11 @@ int mpage_writepage(struct page *page, get_block_t get_block,
.use_writepage = 0,
};
int ret = __mpage_writepage(page, wbc, &mpd);
if (mpd.bio)
mpage_bio_submit(WRITE, mpd.bio);
if (mpd.bio) {
int wr = (wbc->sync_mode == WB_SYNC_ALL ?
WRITE_SYNC : WRITE);
mpage_bio_submit(wr, mpd.bio);
}
return ret;
}
EXPORT_SYMBOL(mpage_writepage);