From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Daniel J Blueman <daniel@quora.org>
Cc: Peter Jones <pjones@redhat.com>,
linux-fbdev@vger.kernel.org, nouveau@lists.freedesktop.org,
Linux Kernel <linux-kernel@vger.kernel.org>,
akpm@linux-foundation.org
Subject: Re: 3.8-rc2: EFI framebuffer lock inversion...
Date: Thu, 3 Jan 2013 13:11:56 +0000 [thread overview]
Message-ID: <20130103131156.214bd7a5@pyramind.ukuu.org.uk> (raw)
In-Reply-To: <CAMVG2ssA-B6s+F-g4mL0dbBSVsNupzT1nm1Kc70dXHGsNQuNYA@mail.gmail.com>
On Thu, 3 Jan 2013 20:56:30 +0800
Daniel J Blueman <daniel@quora.org> wrote:
> On 3.8-rc2 with lockdep enabled and dual-GPU setup (Macbook Pro
> Retina), I see two releated lock inversion issues with the EFI
> framebuffer, leading to possible deadlock: when X takes over from the
> EFI framebuffer [1] and when nouveau releases the framebuffer when
> being vgaswitcherood [2].
>
> Let me know if you'd like any testing or analysis when I can get the time.
The fb layer locking was broken. I posted patches early December which
should have fixed the ones we know about. ('fb: Rework locking to fix
lock ordering on takeover').
Alan
next prev parent reply other threads:[~2013-01-03 13:05 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-03 12:56 Daniel J Blueman
2013-01-03 13:11 ` Alan Cox [this message]
2013-01-03 13:42 ` Daniel J Blueman
2013-01-03 14:28 ` Alan Cox
2013-01-03 19:40 ` Linus Torvalds
2013-01-03 20:06 ` Andrew Morton
2013-01-03 14:11 Sedat Dilek
2013-01-03 14:39 ` Daniel J Blueman
2013-01-03 15:09 ` Sedat Dilek
2013-01-04 10:49 ` Sedat Dilek
2013-01-03 15:36 ` Sedat Dilek
2013-01-03 15:12 Sedat Dilek
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