From: Alasdair G Kergon <agk-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Kent Overstreet
<koverstreet-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org,
device-mapper development
<dm-devel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
david-FqsqvQoI3Ljby3iVrkZq2A@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-bcache-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Mikulas Patocka
<mpatocka-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
bharrosh-C4P08NqkoRlBDgjK7y7TUQ@public.gmane.org,
Vivek Goyal <vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Subject: Re: [dm-devel] [PATCH 2/2] block: Avoid deadlocks with bio allocation by stacking drivers
Date: Mon, 10 Sep 2012 23:50:57 +0100 [thread overview]
Message-ID: <20120910225057.GA10477@agk-dp.fab.redhat.com> (raw)
In-Reply-To: <20120910220910.GB7677-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
On Mon, Sep 10, 2012 at 03:09:10PM -0700, Tejun Heo wrote:
> On Mon, Sep 10, 2012 at 02:56:33PM -0700, Kent Overstreet wrote:
> > commit df7e63cbffa3065fcc4ba2b9a93418d7c7312243
> > Author: Kent Overstreet <koverstreet-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
> > Date: Mon Sep 10 14:33:46 2012 -0700
> >
> > block: Avoid deadlocks with bio allocation by stacking drivers
> > Note that this doesn't do anything for allocation from other mempools.
Note that dm has several cases of this, so this patch should not be used with
dm yet. Mikulas is studying those cases to see whether anything like this
might be feasible/sensible or not.
> I'm still a bit scared but think this is correct.
> Acked-by: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Alasdair
next prev parent reply other threads:[~2012-09-10 22:50 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-07 22:12 [PATCH 0/2] Avoid deadlocks with bio allocation Kent Overstreet
[not found] ` <1347055973-11581-1-git-send-email-koverstreet-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-09-07 22:12 ` [PATCH 1/2] block: Reorder struct bio_set Kent Overstreet
2012-09-07 22:12 ` [PATCH 2/2] block: Avoid deadlocks with bio allocation by stacking drivers Kent Overstreet
[not found] ` <1347055973-11581-3-git-send-email-koverstreet-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-09-08 19:36 ` Tejun Heo
[not found] ` <20120908193641.GB12773-RcKxWJ4Cfj1J2suj2OqeGauc2jM2gXBXkQQo+JxHRPFibQn6LdNjmg@public.gmane.org>
2012-09-10 0:28 ` Kent Overstreet
[not found] ` <20120910002810.GA23241-jC9Py7bek1znysI04z7BkA@public.gmane.org>
2012-09-10 15:25 ` Vivek Goyal
2012-09-10 17:22 ` Tejun Heo
[not found] ` <20120910172210.GC14103-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-09-10 20:24 ` Kent Overstreet
[not found] ` <20120910202435.GG16360-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-09-10 20:40 ` Tejun Heo
[not found] ` <20120910204010.GA32310-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-09-10 21:33 ` Kent Overstreet
[not found] ` <20120910213349.GH16360-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-09-10 21:37 ` Tejun Heo
2012-09-10 21:56 ` Kent Overstreet
[not found] ` <20120910215633.GA19739-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-09-10 22:09 ` Tejun Heo
[not found] ` <20120910220910.GB7677-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-09-10 22:50 ` Alasdair G Kergon [this message]
[not found] ` <20120910225057.GA10477-FDJ95KluN3Z0klwcnFlA1dvLeJWuRmrY@public.gmane.org>
2012-09-10 23:01 ` [dm-devel] " Tejun Heo
2012-09-10 23:06 ` Kent Overstreet
[not found] ` <CAOS58YO5puV2iPhwe0vbyEydPnR=eWPStNRm=xEpMeo-TMHCaw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-09-10 23:09 ` Alasdair G Kergon
[not found] ` <20120910230917.GB10477-FDJ95KluN3Z0klwcnFlA1dvLeJWuRmrY@public.gmane.org>
2012-09-10 23:35 ` Tejun Heo
[not found] ` <20120910233502.GH7677-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-09-10 23:45 ` Alasdair G Kergon
2012-09-10 23:01 ` Kent Overstreet
2012-09-10 23:13 ` Tejun Heo
2012-09-11 18:36 ` Muthu Kumar
[not found] ` <CAFR8ued=Le4B4i_Rf4eECXsVgKvce9J7bO9sDSS91PFzBZ6j5w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2012-09-11 18:45 ` Tejun Heo
[not found] ` <20120911184553.GT7677-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-09-11 18:58 ` Muthu Kumar
2012-09-11 19:31 ` Kent Overstreet
[not found] ` <20120911193124.GI19739-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-09-11 20:00 ` Muthu Kumar
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