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Date: Sun, 16 Dec 2007 09:58:18 +0100 From: Ingo Molnar <mingo@...e.hu> To: Herbert Xu <herbert@...dor.apana.org.au> Cc: Alexey Kuznetsov <kuznet@....inr.ac.ru>, Wang Chen <wangchen@...fujitsu.com>, Gerrit Renker <gerrit@....abdn.ac.uk>, davem@...emloft.net, andi@...stfloor.org, netdev@...r.kernel.org, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Christoph Lameter <clameter@....com> Subject: Re: [PATCH 3/3] [UDP6]: Counter increment on BH mode * Herbert Xu <herbert@...dor.apana.org.au> wrote: > On Sat, Dec 15, 2007 at 07:43:28PM +0100, Ingo Molnar wrote: > > > > we could perhaps introduce stat_smp_processor_id(), which signals that > > the CPU id is used for statistical purposes and does not have to be > > exact? In any case, your patch looks good too. > > Unfortunately that doesn't work because we can then have two CPUs > trying to update the same counter which may corrupt it. ah, indeed. I missed that correctness aspect of your patch. Good catch! Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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