linux-kernel - Re: [PATCH] stack and rcu interaction bug in smp_call_function

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Message-Id: <200808111349.30463.nickpiggin@yahoo.com.au>
Date:	Mon, 11 Aug 2008 13:49:30 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Venki Pallipadi <venkatesh.pallipadi@...el.com>
Cc:	Jens Axboe <jens.axboe@...cle.com>, Ingo Molnar <mingo@...e.hu>,
	npiggin@...e.de, linux-kernel <linux-kernel@...r.kernel.org>,
	suresh.b.siddha@...el.com
Subject: Re: [PATCH] stack and rcu interaction bug in smp_call_function_mask()

On Sunday 10 August 2008 16:24, Nick Piggin wrote:

> I'd suggest something like the attached (untested) patch as the simple
> fix for now.
>
> I expect the benefits from the less synchronized, multiple-in-flight-data
> global queue will still outweigh the costs of dynamic allocations. But
> if worst comes to worst then we just go back to a globally synchronous
> one-at-a-time implementation, but that would be pretty sad!

Just needed a little fix and it appears to boot now. I think it does
the right thing...

View attachment "kernel-smp-call-function-fix.patch" of type "text/x-diff" (2652 bytes)