Jan Kara 6623c19042 writeback: Fix sync livelock due to b_dirty_time processing ... commit f9cae926f3 upstream. When we are processing writeback for sync(2), move_expired_inodes() didn't set any inode expiry value (older_than_this). This can result in writeback never completing if there's steady stream of inodes added to b_dirty_time list as writeback rechecks dirty lists after each writeback round whether there's more work to be done. Fix the problem by using sync(2) start time is inode expiry value when processing b_dirty_time list similarly as for ordinarily dirtied inodes. This requires some refactoring of older_than_this handling which simplifies the code noticeably as a bonus. Fixes: 0ae45f63d4 ("vfs: add support for a lazytime mount option") CC: stable@vger.kernel.org Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-09-03 11:27:04 +02:00
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events	writeback: Fix sync livelock due to b_dirty_time processing	2020-09-03 11:27:04 +02:00
bpf_probe.h	bpf: add writable context for raw tracepoints	2019-04-26 19:04:19 -07:00
define_trace.h	tracing: introduce TRACE_EVENT_NOP()	2019-04-08 09:22:51 -04:00
perf.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
syscall.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
trace_events.h	tracing: Prevent further users of zero size static arrays in trace events	2018-05-29 08:29:13 -04:00