From 36951b38d13ac7cce9fcf89e0e01c22ed0d05688 Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Wed, 16 Nov 2016 10:41:20 +0800 Subject: f2fs: don't wait writeback for datas during checkpoint Normally, while committing checkpoint, we will wait on all pages to be writebacked no matter the page is data or metadata, so in scenario where there are lots of data IO being submitted with metadata, we may suffer long latency for waiting writeback during checkpoint. Indeed, we only care about persistence for pages with metadata, but not pages with data, as file system consistent are only related to metadate, so in order to avoid encountering long latency in above scenario, let's recognize and reference metadata in submitted IOs, wait writeback only for metadatas. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/gc.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'fs/f2fs/gc.c') diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index 36f6cfc..5c2fe68 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -693,8 +693,6 @@ retry: congestion_wait(BLK_RW_ASYNC, HZ/50); goto retry; } - - clear_cold_data(page); } out: f2fs_put_page(page, 1); -- cgit v1.1