Re: md raid5 fsync deadlock
flat view
From: Milan Broz <hidden>
Date: 2012-03-01 08:46:11
On 03/01/2012 02:53 AM, NeilBrown wrote:
On Thu, 01 Mar 2012 00:31:08 +0100 Milan Broz[off-list ref] wrote:
Are you certain it is a deadlock? No forward progress at all?
Seems so, it was for several hours in this state without progress.
What is in md/stripe_cache_size? Does it change?
What happens if you double the number in stripe_cache_size? What if you double it again?
stripe_cache_size was 256, I doubled it to 512, now stripe_cache_active is 390 stripe_cache size is 512 and no progress. With stripe_cache size 1024 it survived few iterations of fio run, now it is locked up again: stripe_cache_active is 921 stripe_cache size is 1024 Thanks, Milan