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Date: Wed, 25 Aug 2004 10:36:40 -0700
From: "Martin J. Bligh" <mbligh@aracnet.com>
To: Ryan Cumming <ryan@spitfire.gotdns.org>
cc: linux-kernel@vger.kernel.org
Subject: Re: Possible dcache BUG
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--Ryan Cumming <ryan@spitfire.gotdns.org> wrote (on Wednesday, August 25, 2004 10:23:29 -0700):

> On Wednesday 25 August 2004 07:55, Martin J. Bligh wrote:
>> This whole thread makes me think ... if we oops, shouldn't we check if
>> we're holding any spinlocks or semaphores, and just panic the whole
>> machine if so? Not sure how expensive it would be to hold that state,
>> but ...
> 
> On preempt, wouldn't it just be a matter of checking preempt_count?

Spinlocks, with or without preeempt, can probably do something like this.
But I don't think that works for sems.

M.