From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Keith Owens <kaos@ocs.com.au>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.7-rc2 mismatched preempt count in arch/i386/kernel/irq.c
Date: Mon, 31 May 2004 17:50:50 +1000 [thread overview]
Message-ID: <40BAE3DA.1010900@yahoo.com.au> (raw)
In-Reply-To: <15151.1085988908@kao2.melbourne.sgi.com>
Keith Owens wrote:
> 2.6.7-rc2 (and earlier) arch/i386/kernel/irq.c::do_IRQ() calls
> irq_exit() which expands into preempt_enable_no_resched(), amongst
> others. With CONFIG_PREEMPT=y, preempt_enable_no_resched() does
> dec_preempt_count(). Where is the corresponding inc_preempt_count?
> AFAICT the use of preempt_enable_no_resched() is unbalanced.
>
If preempt is enabled, IRQ_EXIT_OFFSET is HARDIRQ_OFFSET-1.
I believe that is where the preempt_enable_no_resched is balanced.
prev parent reply other threads:[~2004-05-31 7:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-31 7:35 2.6.7-rc2 mismatched preempt count in arch/i386/kernel/irq.c Keith Owens
2004-05-31 7:50 ` Zwane Mwaikambo
2004-05-31 7:56 ` Keith Owens
2004-05-31 7:50 ` Nick Piggin [this message]
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