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authorChao Yu <yuchao0@huawei.com>2016-09-29 13:50:11 +0300
committerJaegeuk Kim <jaegeuk@kernel.org>2016-10-01 03:34:39 +0300
commit6ca56ca429aa94399534ec00598f7f9847c4cae2 (patch)
tree474779e602e1f6de6b041691916d92f2de09fbe7 /fs/f2fs
parent3f5f4959b144d9ba6657ccc0ab9edcc78fcc1d8a (diff)
downloadlinux-6ca56ca429aa94399534ec00598f7f9847c4cae2.tar.xz
f2fs: don't submit irrelevant page
While we call ->writepages, there are two cases: a. we didn't writeout any dirty pages, since they are writebacked by other thread concurrently. b. we writeout dirty pages, and have already submitted bio to block layer. In these cases, we don't need to do additional bio flushing unnecessarily, it may split bio in cache into smaller one. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/data.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 8b9a1dc151b2..0d0177c9149c 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1355,6 +1355,7 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
int cycled;
int range_whole = 0;
int tag;
+ int nwritten = 0;
pagevec_init(&pvec, 0);
@@ -1429,6 +1430,8 @@ continue_unlock:
done_index = page->index + 1;
done = 1;
break;
+ } else {
+ nwritten++;
}
if (--wbc->nr_to_write <= 0 &&
@@ -1450,6 +1453,10 @@ continue_unlock:
if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
mapping->writeback_index = done_index;
+ if (nwritten)
+ f2fs_submit_merged_bio_cond(F2FS_M_SB(mapping), mapping->host,
+ NULL, 0, DATA, WRITE);
+
return ret;
}
@@ -1491,7 +1498,6 @@ static int f2fs_write_data_pages(struct address_space *mapping,
* if some pages were truncated, we cannot guarantee its mapping->host
* to detect pending bios.
*/
- f2fs_submit_merged_bio(sbi, DATA, WRITE);
remove_dirty_inode(inode);
return ret;