From: Chao Yu <yuchao0@huawei.com>
To: <jaegeuk@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net
Subject: [f2fs-dev] [PATCH 2/2] f2fs: fix to wait all node page writeback
Date: Fri, 14 Feb 2020 17:45:12 +0800 [thread overview]
Message-ID: <20200214094512.13035-2-yuchao0@huawei.com> (raw)
In-Reply-To: <20200214094512.13035-1-yuchao0@huawei.com>
There is a race condition that we may miss to wait for all node pages
writeback, fix it.
- fsync() - shrink
- f2fs_do_sync_file
- __write_node_page
- set_page_writeback(page#0)
: remove DIRTY/TOWRITE flag
- f2fs_fsync_node_pages
: won't find page #0 as TOWRITE flag was removeD
- f2fs_wait_on_node_pages_writeback
: wont' wait page #0 writeback as it was not in fsync_node_list list.
- f2fs_add_fsync_node_entry
Fixes: 50fa53eccf9f ("f2fs: fix to avoid broken of dnode block list")
Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
fs/f2fs/node.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 332cebc2033c..9824f055a5bc 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1561,15 +1561,16 @@ static int __write_node_page(struct page *page, bool atomic, bool *submitted,
if (atomic && !test_opt(sbi, NOBARRIER))
fio.op_flags |= REQ_PREFLUSH | REQ_FUA;
- set_page_writeback(page);
- ClearPageError(page);
-
+ /* should add to global list before clearing PAGECACHE status */
if (f2fs_in_warm_node_list(sbi, page)) {
seq = f2fs_add_fsync_node_entry(sbi, page);
if (seq_id)
*seq_id = seq;
}
+ set_page_writeback(page);
+ ClearPageError(page);
+
fio.old_blkaddr = ni.blk_addr;
f2fs_do_write_node_page(nid, &fio);
set_node_addr(sbi, &ni, fio.new_blkaddr, is_fsync_dnode(page));
--
2.18.0.rc1
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prev parent reply other threads:[~2020-02-14 9:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-14 9:45 [f2fs-dev] [PATCH 1/2] f2fs: fix to show norecovery mount option Chao Yu
2020-02-14 9:45 ` Chao Yu [this message]
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