From: Milan Broz <mbroz@redhat.com>
To: NeilBrown <neilb@suse.de>
Cc: linux-raid@vger.kernel.org
Subject: Re: md raid5 fsync deadlock
Date: Thu, 01 Mar 2012 09:46:11 +0100 [thread overview]
Message-ID: <4F4F3753.80505@redhat.com> (raw)
In-Reply-To: <20120301125325.2b17e5f8@notabene.brown>
On 03/01/2012 02:53 AM, NeilBrown wrote:
> On Thu, 01 Mar 2012 00:31:08 +0100 Milan Broz<mbroz@redhat.com> 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
next prev parent reply other threads:[~2012-03-01 8:46 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-29 23:31 md raid5 fsync deadlock Milan Broz
2012-03-01 1:53 ` NeilBrown
2012-03-01 8:46 ` Milan Broz [this message]
2012-03-04 9:20 ` NeilBrown
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4F4F3753.80505@redhat.com \
--to=mbroz@redhat.com \
--cc=linux-raid@vger.kernel.org \
--cc=neilb@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.