linux-kernel - Re: [GIT PULL] Queue free fix (was Re: [PATCH] block: Free queue resources at blk_release

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 17 Nov 2011 11:29:20 -0500
From:	Mike Snitzer <snitzer@...hat.com>
To:	Heiko Carstens <heiko.carstens@...ibm.com>
Cc:	Hannes Reinecke <hare@...e.de>,
	"Jun'ichi Nomura" <j-nomura@...jp.nec.com>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Steffen Maier <maier@...ux.vnet.ibm.com>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	Jens Axboe <axboe@...nel.dk>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Thadeu Lima de Souza Cascardo <cascardo@...ux.vnet.ibm.com>,
	"Taraka R. Bodireddy" <tarak.reddy@...ibm.com>,
	"Seshagiri N. Ippili" <seshagiri.ippili@...ibm.com>,
	"Manvanthara B. Puttashankar" <mputtash@...ibm.com>,
	Jeff Moyer <jmoyer@...hat.com>,
	Shaohua Li <shaohua.li@...el.com>, gmuelas@...ibm.com
Subject: Re: [GIT PULL] Queue free fix (was Re: [PATCH] block: Free queue
 resources at blk_release_queue())

On Thu, Nov 10 2011 at 11:10am -0500,
Heiko Carstens <heiko.carstens@...ibm.com> wrote:

> On Wed, Nov 09, 2011 at 10:37:06AM +0100, Hannes Reinecke wrote:

...
 
> > Hmm. Just to be on the safe side, could you try this one:
> > 
> > diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
> > index 5e0090e..e6fad46 100644
> > --- a/drivers/md/dm-mpath.c
> > +++ b/drivers/md/dm-mpath.c
> > @@ -920,8 +920,10 @@ static int multipath_map(struct dm_target *ti,
> > struct reque
> > st *clone,
> >         map_context->ptr = mpio;
> >         clone->cmd_flags |= REQ_FAILFAST_TRANSPORT;
> >         r = map_io(m, clone, mpio, 0);
> > -       if (r < 0 || r == DM_MAPIO_REQUEUE)
> > +       if (r < 0 || r == DM_MAPIO_REQUEUE) {
> >                 mempool_free(mpio, m->mpio_pool);
> > +               map_context->ptr = NULL;
> > +       }
> > 
> >         return r;
> >  }
> 
> With your patch we haven't been able to reproduce the kernel crash until now.
> Now we "only" run into I/O stalls, which before your patch we also did. But
> repeatedly rebooting and retrying and ignoring the I/O stalls always lead to
> a crash.
> Gonzalo will run a couple of extra rounds so we can have a feeling if at least
> one of the bugs could be fixed with your patch ;)

Hi,

Any update after further testing with Hannes' patch?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/