Yunlei He 7b9a87094a
UPSTREAM: 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))
break;
<--------- wake_up
io_schedule();
Change-Id: I8a60393c91343d75b7d48df2ca19d1735d69cc51
Signed-off-by: Yunlei He <heyunlei@huawei.com >
Signed-off-by: Biao He <hebiao6@huawei.com >
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org >
(cherry picked from commit 0ff21646f2cliff.chen@rock-chips.com >
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7b9a87094a