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From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH 0 of 9] x86/smp function calls: convert x86 tlb flushes to use function calls [POST 2]
Date: Tue, 19 Aug 2008 21:08:13 +1000
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Cc: Jeremy Fitzhardinge <jeremy@goop.org>, LKML <linux-kernel@vger.kernel.org>,
       x86@kernel.org, Andi Kleen <andi@firstfloor.org>,
       Jens Axboe <jens.axboe@oracle.com>
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On Tuesday 19 August 2008 20:20, Ingo Molnar wrote:
> * Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> > I'm especially sore about mmap because I have a customer with a
> > database that uses a lot of mmap/munmap and those calls have slowed
> > down something like 50%(!!) from 2.6.early to 2.6.late.
>
> oh, agreed that it all needs to speed up - please send testcases ...

I'm not sure if I can send the testcase I have. But this issue is
coming to the top of my list to investigate in mainline, so I'll
check out how we're doing here soon.