Artem Bityutskiy wrote:
Jens Axboe wrote:
Hi,
Here's the 9th version of the writeback patches. Changes since v8:
- Fix a bdi_work on-stack allocation hang. I hope this fixes Ted's
issue.
- Get rid of the explicit wait queues, we can just use wake_up_process()
since it's just for that one task.
- Add separate "sync_supers" thread that makes sure that the dirty
super blocks get written. We cannot safely do this from
bdi_forker_task(),
as that risks deadlocking on ->s_umount. Artem, I implemented this
by doing the wake ups from a timer so that it would be easier for you
to just deactivate the timer when there are no super blocks.
For ease of patching, I've put the full diff here:
http://kernel.dk/writeback-v9.patch
and also stored this in a writeback-v9 branch that will not change,
you can pull that into Linus tree from here:
git://git.kernel.dk/linux-2.6-block.git writeback-v9
I'm working with the above branch. Got the following twice.
Not sure what triggers this, probably if I do nothing and
cpufreq starts doing its magic, this is triggered.
And I'm not sure it has something to do with your changes,
it is just that I saw this only with your tree. Please,
ignore if this is not relevant.
Sorry, probably I shouldn't have reported this before looking
closer. I'll investigate this later and fine out whether it
is related to your work or not. Sorry for too early and probably
false alarm.
--
Best Regards,
Artem Bityutskiy (Артём Битюцкий)
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