Commit 0ff21646 authored by Yunlei He's avatar Yunlei He Committed by Jaegeuk Kim
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f2fs: avoid hungtask problem caused by losing wake_up

The D state of wait_on_all_pages_writeback should be waken by
function f2fs_write_end_io when all writeback pages have been
succesfully written to device. It's possible that wake_up comes
between get_pages and io_schedule. Maybe in this case it will
lost wake_up and still in D state even if all pages have been
write back to device, and finally, the whole system will be into
the hungtask state.

                if (!get_pages(sbi, F2FS_WRITEBACK))
					<---------  wake_up
Signed-off-by: default avatarYunlei He <>
Signed-off-by: default avatarBiao He <>
Signed-off-by: default avatarJaegeuk Kim <>
parent 7a9d7548
......@@ -920,7 +920,7 @@ static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
if (!get_pages(sbi, F2FS_WRITEBACK))
finish_wait(&sbi->cp_wait, &wait);
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