From: Ingo Molnar <mingo@elte.hu>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
Andrew Morton <akpm@osdl.org>,
arjan@linux.intel.com, linux-kernel@vger.kernel.org
Subject: Re: [patch, -rc5-mm3] fix irqpoll some more
Date: Tue, 6 Jun 2006 15:53:53 +0200 [thread overview]
Message-ID: <20060606135353.GA25609@elte.hu> (raw)
In-Reply-To: <1149600355.16247.49.camel@localhost.localdomain>
* Steven Rostedt <rostedt@goodmis.org> wrote:
> On Mon, 2006-06-05 at 10:49 +0200, Ingo Molnar wrote:
>
> > + /*
> > + * HACK:
> > + *
> > + * In the first pass we dont touch handlers that are behind
> > + * a disabled IRQ line. In the second pass (having no other
> > + * choice) we ignore the disabled state of IRQ lines. We've
> > + * got a screaming interrupt, so we have the choice between
> > + * a real lockup happening due to that screaming interrupt,
> > + * against a theoretical locking that becomes possible if we
> > + * ignore a disabled IRQ line.
>
> FYI, with irqpoll on in my i386 SMP machine, I hit this theoretical
> locking every time in the vortex driver.
you got a lockup/deadlock every time, due to the bug that the lock
validator pointed out?
Ingo
next prev parent reply other threads:[~2006-06-06 13:54 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200606050600.k5560GdU002338@shell0.pdx.osdl.net>
[not found] ` <1149497459.23209.39.camel@localhost.localdomain>
2006-06-05 8:49 ` [patch, -rc5-mm3] fix irqpoll some more Ingo Molnar
2006-06-05 13:05 ` Alan Cox
2006-06-05 12:52 ` Ingo Molnar
2006-06-06 13:25 ` Steven Rostedt
2006-06-06 13:53 ` Ingo Molnar [this message]
2006-06-06 14:40 ` Steven Rostedt
2006-06-06 14:59 ` Ingo Molnar
2006-06-06 15:32 ` Steven Rostedt
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