From: Arnd Bergmann <arnd@arndb.de>
To: "Zdenek Kabelac" <zdenek.kabelac@gmail.com>
Cc: "Ingo Molnar" <mingo@elte.hu>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
"Peter Zijlstra" <a.p.zijlstra@chello.nl>
Subject: Re: sys_sched_yield keeps locked irq before call of schedule()
Date: Wed, 5 Nov 2008 15:05:15 +0100 [thread overview]
Message-ID: <200811051505.16145.arnd@arndb.de> (raw)
In-Reply-To: <c4e36d110811050509t51719671saa7eb337fca39656@mail.gmail.com>
On Wednesday 05 November 2008, Zdenek Kabelac wrote:
> > is this some special warning you added? The stock kernel certainly
> > does not emit this warning.
>
> Yes - it's my personal debug checker that tries to watch wether irq &
> irqsafe are running in pair.
> So it shows a warning if there is a call of spin_lock_irq and irq is
> already dissabled.
I've done such a checker before as well, but back then it showed
far too many false positives. If you have a working version, can you
post your patch here? I think that would be very useful in the kernel.
Arnd <><
next prev parent reply other threads:[~2008-11-05 14:05 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-05 12:57 sys_sched_yield keeps locked irq before call of schedule() Zdenek Kabelac
2008-11-05 13:01 ` Ingo Molnar
2008-11-05 13:09 ` Zdenek Kabelac
2008-11-05 14:05 ` Arnd Bergmann [this message]
2008-11-05 14:37 ` Zdenek Kabelac
2008-11-06 7:57 ` Ingo Molnar
2008-11-06 13:46 ` Steven Rostedt
2008-11-06 14:34 ` Ingo Molnar
2008-11-06 14:46 ` Steven Rostedt
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