From: NeilBrown <neilb@suse.de>
To: Alexander Lyakas <alex.bolshoy@gmail.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: commit backport request
Date: Mon, 16 Jul 2012 13:23:00 +1000 [thread overview]
Message-ID: <20120716132300.11fad63c@notabene.brown> (raw)
In-Reply-To: <CAGRgLy4tBOS1B8raJmxoge1CaWc-18=c_fMe6E_oCqa1ntSHzQ@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 1488 bytes --]
On Fri, 13 Jul 2012 00:28:00 +0300 Alexander Lyakas <alex.bolshoy@gmail.com>
wrote:
> Hi,
> Is there any indication that can tell I am hitting this particular issue?
> I think I hit something similar to that once, IOs were hang within a
> raid5 and not returning. I issues w > sysrq-trigger and also have most
> of the procfs/<pid> info, so is there something I can look at to
> confirm?
IO stops, processes get blocked in get_active_stripe(). Increasing
stripe_cache_size allows a bit more IO through it eventually all fills up
again.
NeilBrown
>
>
>
> On Thu, Jul 12, 2012 at 7:14 AM, NeilBrown <neilb@suse.de> wrote:
> > On Wed, 11 Jul 2012 15:07:40 -0700 Greg KH <gregkh@linuxfoundation.org> wrote:
> >
> >> On Mon, Jul 09, 2012 at 02:02:30PM +1000, NeilBrown wrote:
> >> >
> >> > Hi Mr Stable,
> >> >
> >> > please apply patch
> >> >
> >> > commit fab363b5ff502d1b39ddcfec04271f5858d9f26e
> >> > Author: Shaohua Li <shli@kernel.org>
> >> > Date: Tue Jul 3 15:57:19 2012 +1000
> >> >
> >> > raid5: delayed stripe fix
> >> >
> >> >
> >> > to 3.4.y and 3.2.y.
> >> >
> >> > It fixes a deadlock in RAID5 which can cause all IO to hang.
> >> > It has been demonstrated to fix a real-life problem (the race is not
> >> > theoretical).
> >>
> >> Is it also needed for 3.0.x? It seems to apply there just fine.
> >
> > Yes it is. Don't know why I missed that.
> > I see you've already included it - thanks.
> >
> > NeilBrown
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 828 bytes --]
next prev parent reply other threads:[~2012-07-16 3:23 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-09 4:02 commit backport request NeilBrown
2012-07-09 5:08 ` Igor M Podlesny
2012-07-09 5:19 ` NeilBrown
2012-07-11 22:07 ` Greg KH
2012-07-12 4:14 ` NeilBrown
2012-07-12 21:28 ` Alexander Lyakas
2012-07-16 3:23 ` NeilBrown [this message]
2012-07-16 8:59 ` Alexander Lyakas
2012-07-12 3:52 ` Ben Hutchings
2012-07-17 3:26 ` Igor M Podlesny
2012-07-17 3:43 ` NeilBrown
2012-07-17 3:48 ` Ben Hutchings
2012-07-20 2:38 ` Igor M Podlesny
2012-07-20 2:58 ` NeilBrown
2012-07-20 6:35 ` Igor M Podlesny
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=20120716132300.11fad63c@notabene.brown \
--to=neilb@suse.de \
--cc=alex.bolshoy@gmail.com \
--cc=linux-raid@vger.kernel.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).