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Commit fd36b4ba authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
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f2fs: detect synchronous writeback more earlier 



This patch changes to detect synchronous writeback more earlier before,
in order to avoid unnecessary page writeback before exiting asynchronous
writeback.

Signed-off-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 767fcf33

fs/f2fs/data.c

+8 −3
Original line number Diff line number Diff line
@@ -1962,6 +1962,13 @@ retry: 
			struct page *page = pvec.pages[i];

			bool submitted = false;



			/* give a priority to WB_SYNC threads */

			if (atomic_read(&F2FS_M_SB(mapping)->wb_sync_req) &&

					wbc->sync_mode == WB_SYNC_NONE) {

				done = 1;

				break;

			}



			done_index = page->index;

retry_write:

			lock_page(page);
@@ -2016,9 +2023,7 @@ continue_unlock: 
				last_idx = page->index;

			}



			/* give a priority to WB_SYNC threads */

			if ((atomic_read(&F2FS_M_SB(mapping)->wb_sync_req) ||

					--wbc->nr_to_write <= 0) &&

			if (--wbc->nr_to_write <= 0 &&

					wbc->sync_mode == WB_SYNC_NONE) {

				done = 1;

				break;