From: Rudo Thomas <rudo@matfyz.cz>
To: linux-kernel@vger.kernel.org
Subject: bug, or is it? - SCHED_RR and FPU related
Date: Thu, 12 Feb 2004 21:57:08 +0100 [thread overview]
Message-ID: <20040212205708.GA1679@ss1000.ms.mff.cuni.cz> (raw)
Hello.
I have stumbled upon a grave bug, I think. I can reproduce a hard lock-up using
xmms and a buggy plugin - only SysRq-B helps. I managed to narrow it down to
"0.5/NAN"-like operation. It only causes a complete hang when xmms is run with
SCHED_RR priority. Otherwise, only xmms hangs. Unfortunately, I was not able to
create a working proof-of-concept program.
The question is - is this a kernel bug, OR something that cannot be prevented
from happening when using SCHED_RR policy?
Tried with 2.6.3-rc[12] and glibc-2.3.2 (-r9 gentoo) with nptl support (if that
matters).
Have a nice day.
Rudo.
next reply other threads:[~2004-02-12 21:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-12 20:57 Rudo Thomas [this message]
2004-02-12 22:58 ` Nick Piggin
2004-02-13 0:47 ` Rudo Thomas
2004-02-13 0:57 ` Nick Piggin
2004-02-13 10:02 ` Rudo Thomas
2004-02-13 10:13 ` bug, or is it? - SCHED_RR and futex related Rudo Thomas
2004-02-13 14:37 ` Jamie Lokier
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