From: Keir Fraser <keir@xen.org>
To: Stefan Bader <stefan.bader@canonical.com>
Cc: xen-devel@lists.xensource.com,
Ian Jackson <Ian.Jackson@eu.citrix.com>,
Jan Beulich <JBeulich@suse.com>,
Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>
Subject: Re: [xen-4.1-testing test] 9805: regressions - FAIL
Date: Thu, 17 Nov 2011 10:13:10 +0000 [thread overview]
Message-ID: <CAEA8EB6.343DD%keir@xen.org> (raw)
In-Reply-To: <4EC4DA9C.60600@canonical.com>
On 17/11/2011 09:57, "Stefan Bader" <stefan.bader@canonical.com> wrote:
>>> This is due to a bad backport of c/s 24007:0526644ad2a6: In -unstable,
>>> evtchn_unmask() must be called with d->event_lock held, while in 4.1
>>> the function acquires the lock (and now gets called with the lock already
>>> held from do_physdev_op()'s case PHYSDEVOP_eoi). The change dates
>>> back to 23573:584c2e5e03d9, which hardly is a candidate for backporting
>>> (but maybe the locking change needs to be pulled out of there).
>>
>> Interestingly, Ubuntu's 4.1 fix has exactly the same problem.
>>
>
> Hm, yes we should. I am pretty sure I hit that code path often enough, Wonder
> why I never saw any dead lock there...
Perhaps your dom0 kernel doesn't register a pirq_eoi_map.
-- Keir
next prev parent reply other threads:[~2011-11-17 10:13 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-16 22:23 [xen-4.1-testing test] 9805: regressions - FAIL xen.org
2011-11-17 8:32 ` Jan Beulich
2011-11-17 9:06 ` Keir Fraser
2011-11-17 9:57 ` Stefan Bader
2011-11-17 10:13 ` Keir Fraser [this message]
2011-11-17 10:28 ` Stefan Bader
2011-11-17 10:32 ` Stefano Stabellini
2011-11-17 10:37 ` Keir Fraser
2011-11-17 10:43 ` Stefano Stabellini
2011-11-17 11:32 ` Sander Eikelenboom
2011-11-17 12:42 ` Ian Jackson
2011-11-17 20:03 ` Pasi Kärkkäinen
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