From: Andi Kleen <andi@firstfloor.org>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Ingo Molnar <mingo@elte.hu>,
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>
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 12:31:00 +0200 [thread overview]
Message-ID: <20080819103100.GH9807@one.firstfloor.org> (raw)
In-Reply-To: <200808191956.59898.nickpiggin@yahoo.com.au>
> 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.
These are small mmaps right? Also in this case no kmalloc should
be needed anyways.
AFAIK mmap flushing hasn't changed much in 2.6 and it tends
to batch well anyways in this case (unlike vmscan swapping). I would be
careful to really optimize the real culprits which are likely elsewhere.
-Andi
next prev parent reply other threads:[~2008-08-19 10:29 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-18 18:23 [PATCH 0 of 9] x86/smp function calls: convert x86 tlb flushes to use function calls [POST 2] Jeremy Fitzhardinge
2008-08-18 18:23 ` [PATCH 1 of 9] x86: put tlb_flush_others() stats in debugfs Jeremy Fitzhardinge
2008-08-18 18:23 ` [PATCH 2 of 9] x86-32: use smp_call_function_mask for SMP TLB invalidations Jeremy Fitzhardinge
2008-08-18 18:23 ` [PATCH 3 of 9] x86-64: " Jeremy Fitzhardinge
2008-08-18 18:23 ` [PATCH 4 of 9] x86: make tlb_32|64 closer Jeremy Fitzhardinge
2008-08-18 18:23 ` [PATCH 5 of 9] x86: unify tlb.c Jeremy Fitzhardinge
2008-08-18 18:23 ` [PATCH 6 of 9] smp_function_call: add multiple queues for scalability Jeremy Fitzhardinge
2008-08-18 18:23 ` [PATCH 7 of 9] x86: add multiple smp_call_function queues Jeremy Fitzhardinge
2008-08-18 18:23 ` [PATCH 8 of 9] x86: make number of smp_call_function queues truely configurable Jeremy Fitzhardinge
2008-08-18 18:23 ` [PATCH 9 of 9] smp function calls: add kernel parameter to disable multiple queues Jeremy Fitzhardinge
2008-08-19 0:45 ` [PATCH 0 of 9] x86/smp function calls: convert x86 tlb flushes to use function calls [POST 2] Ingo Molnar
2008-08-19 1:28 ` Ingo Molnar
2008-08-19 6:18 ` Jeremy Fitzhardinge
2008-08-19 9:27 ` Ingo Molnar
2008-08-19 14:58 ` Jeremy Fitzhardinge
2008-08-19 9:45 ` Peter Zijlstra
2008-08-19 14:58 ` Jeremy Fitzhardinge
2008-08-19 5:37 ` Jeremy Fitzhardinge
2008-08-19 9:31 ` Ingo Molnar
2008-08-19 9:56 ` Nick Piggin
2008-08-19 10:20 ` Ingo Molnar
2008-08-19 11:08 ` Nick Piggin
2008-08-19 11:44 ` Ingo Molnar
2008-08-19 10:24 ` Ingo Molnar
2008-08-19 10:49 ` Nick Piggin
2008-08-19 10:31 ` Andi Kleen [this message]
2008-08-19 11:04 ` Nick Piggin
2008-08-19 11:20 ` Andi Kleen
2008-08-19 7:32 ` Andi Kleen
2008-08-19 7:44 ` Jeremy Fitzhardinge
2008-08-19 7:48 ` Andi Kleen
2008-08-19 8:04 ` Jeremy Fitzhardinge
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