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f2fs: call SetPageUptodate if needed

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SetPageUptodate() issues memory barrier, resulting in performance degrdation.
Let's avoid that.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim
2016-06-30 18:49:15 -07:00
parent fe76b796fc
commit 237c0790e5
5 changed files with 30 additions and 15 deletions
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18
fs/f2fs/data.c
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@@ -47,7 +47,8 @@ static void f2fs_read_end_io(struct bio *bio)
struct page *page = bvec->bv_page;
if (!bio->bi_error) {
SetPageUptodate(page);
if (!PageUptodate(page))
SetPageUptodate(page);
} else {
ClearPageUptodate(page);
SetPageError(page);
@@ -443,7 +444,8 @@ got_it:
*/
if (dn.data_blkaddr == NEW_ADDR) {
zero_user_segment(page, 0, PAGE_SIZE);
SetPageUptodate(page);
if (!PageUptodate(page))
SetPageUptodate(page);
unlock_page(page);
return page;
}
@@ -554,7 +556,8 @@ struct page *get_new_data_page(struct inode *inode,
if (dn.data_blkaddr == NEW_ADDR) {
zero_user_segment(page, 0, PAGE_SIZE);
SetPageUptodate(page);
if (!PageUptodate(page))
SetPageUptodate(page);
} else {
f2fs_put_page(page, 1);
@@ -1065,7 +1068,8 @@ got_it:
}
} else {
zero_user_segment(page, 0, PAGE_SIZE);
SetPageUptodate(page);
if (!PageUptodate(page))
SetPageUptodate(page);
unlock_page(page);
goto next_page;
}
@@ -1659,7 +1663,8 @@ repeat:
}
}
out_update:
SetPageUptodate(page);
if (!PageUptodate(page))
SetPageUptodate(page);
out_clear:
clear_cold_data(page);
return 0;
@@ -1813,7 +1818,8 @@ static int f2fs_set_data_page_dirty(struct page *page)
trace_f2fs_set_page_dirty(page, DATA);
SetPageUptodate(page);
if (!PageUptodate(page))
SetPageUptodate(page);
if (f2fs_is_atomic_file(inode)) {
if (!IS_ATOMIC_WRITTEN_PAGE(page)) {