Messages in this thread | | | Date | Wed, 3 Mar 2010 13:09:27 +0100 | From | Jens Axboe <> | Subject | Re: [Bugme-new] [Bug 15426] New: Running many copies of bonnie++ on different filesystems seems to deadlock in sync |
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On Wed, Mar 03 2010, John Hughes wrote: > Jens Axboe wrote: >> On Wed, Mar 03 2010, John Hughes wrote: >> >>> Just a thought. What exactly is sync(2) supposed to do - block until >>> there are no more dirty pages, or block until all pages that were >>> dirty when the sync was done are clean? In other words is the >>> problem simply that pages are being dirtied faster than the sync is >>> writing them out? >>> >> >> Our sync is currently broken in that regard, since it'll wait for too >> long. We have a debated patch going, I have included it below. Any >> chance you could give it a whirl? >> >> The semantics of sync are supposed to be 'wait for dirty IO generated >> BEFORE this sync call'. >> > Ok, I will try this patch and get back to you.
Looking at your bug report, I saw that you were on 2.6.32. If you are testing 2.6.33, let me know, the patch wont apply (I have another variant for that).
-- Jens Axboe
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