Re: [Bugme-new] [Bug 15426] New: Running many copies of bonnie++on different filesystems seems to deadlock in sync

From: John Hughes
Date: Wed Mar 03 2010 - 06:59:29 EST


Jens Axboe wrote:
Is IO still going on, or does it appear to be stuck? From the traces
below, we have various procs caught in waiting for a request. So if
things are totally stuck, it could be some race in there.
I see I/O happening on three or four of the disks.

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?
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