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| author |   Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2010-07-25 14:29:15 +0300 |
|---|---|---|
| committer |   Jens Axboe <jaxboe@fusionio.com> | 2010-08-07 18:53:55 +0200 |
| commit | 297252c81de8043ca6c36e5984c24fdb5aab9013 (patch) | |
| tree | d94a35abcd3b227b072955622f703a2cdc3c309d /mm/backing-dev.c | |
| parent | writeback: do not lose wake-ups in the forker thread - 2 (diff) | |
| download | linux-dev-297252c81de8043ca6c36e5984c24fdb5aab9013.tar.xz linux-dev-297252c81de8043ca6c36e5984c24fdb5aab9013.zip | |
writeback: do not lose wake-ups in bdi threads
Currently, bdi threads ('bdi_writeback_thread()') can lose wake-ups. For
example, if 'bdi_queue_work()' is executed after the bdi thread have had
finished 'wb_do_writeback()' but before it called
'schedule_timeout_interruptible()'.
To fix this issue, we have to check whether we have works to process after we
have changed the task state to 'TASK_INTERRUPTIBLE'.
This patch also clean-ups handling of the cases when 'dirty_writeback_interval'
is zero or non-zero.
Additionally, this patch also removes unneeded 'list_empty_careful()' call.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'mm/backing-dev.c')
0 files changed, 0 insertions, 0 deletions