From: Matt Mackall <mpm@selenic.com>
To: Rik van Riel <riel@redhat.com>
Cc: stian@nixia.no, linux-kernel@vger.kernel.org
Subject: Re: timer + fpu stuff locks my console race
Date: Fri, 11 Jun 2004 23:35:47 -0500 [thread overview]
Message-ID: <20040612043546.GF5414@waste.org> (raw)
In-Reply-To: <Pine.LNX.4.44.0406112252160.13607-100000@chimarrao.boston.redhat.com>
On Fri, Jun 11, 2004 at 10:53:48PM -0400, Rik van Riel wrote:
> On Wed, 9 Jun 2004 stian@nixia.no wrote:
>
> > I'm doing some code tests when I came across problems with my program
> > locking my console (even X if I'm using a xterm).
>
> Reproduced here, on my test system running a 2.6 kernel.
> I did get a kernel backtrace over serial console, though ;)
I stuck some strategic printks in the kernel. The example code's bogus
asm is generating an FPU fault in frstor in its signal handler, that's
bumping us into math_error -> force_sig_info ->
specific_send_sig_info. Then we hit:
if (LEGACY_QUEUE(&t->pending, sig))
which decides we don't need to send the signal after all and we bail
all the way back out and recurse.
--
Mathematics is the supreme nostalgia of our time.
next prev parent reply other threads:[~2004-06-12 4:36 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-09 21:02 timer + fpu stuff locks my console race stian
2004-06-10 21:00 ` Matias Hermanrud Fjeld
2004-06-11 6:08 ` Lars Age Kamfjord
2004-06-12 2:53 ` Rik van Riel
2004-06-12 3:50 ` Rik van Riel
2004-06-12 13:44 ` Sergey Vlasov
2004-06-12 13:57 ` stian
2004-06-12 14:28 ` Sergey Vlasov
2004-06-12 14:25 ` timer + fpu stuff locks up computer Alexander Nyberg
2004-06-12 14:42 ` stian
2004-06-12 15:20 ` martin capitanio
2004-06-12 16:15 ` stian
2004-06-12 15:14 ` Sergey Vlasov
2004-06-12 18:45 ` Sergey Vlasov
2004-06-12 20:27 ` Alexander Nyberg
2004-06-12 4:35 ` Matt Mackall [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-06-10 18:59 timer + fpu stuff locks my console race Lars Age Kamfjord
2004-06-10 19:21 ` Lars Age Kamfjord
2004-06-10 19:27 Bård Kalbakk
2004-06-11 12:10 stian
2004-06-11 12:20 Gard Spreemann
2004-06-12 12:26 stian
2004-06-12 13:14 stian
2004-06-12 13:28 stian
2004-06-12 13:45 ` Manuel Arostegui Ramirez
2004-06-12 13:50 ` Kalin KOZHUHAROV
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