From: Christoph Lameter <cl@gentwo.org>
To: Gilad Ben-Yossef <gilad@benyossef.com>
Cc: lkml@vger.kernel.org, Peter Zijlstra <a.p.zijlstra@chello.nl>,
Frederic Weisbecker <fweisbec@gmail.com>,
Russell King <linux@arm.linux.org.uk>,
linux-mm@kvack.org, Pekka Enberg <penberg@kernel.org>,
Matt Mackall <mpm@selenic.com>,
Sasha Levin <levinsasha928@gmail.com>
Subject: Re: [PATCH v2 4/6] mm: Only IPI CPUs to drain local pages if they exist
Date: Thu, 27 Oct 2011 23:10:58 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.00.1110272307110.14619@router.home> (raw)
In-Reply-To: <1319384922-29632-5-git-send-email-gilad@benyossef.com>
On Sun, 23 Oct 2011, Gilad Ben-Yossef wrote:
> +/* Which CPUs have per cpu pages */
> +cpumask_var_t cpus_with_pcp;
> +static DEFINE_PER_CPU(unsigned long, total_cpu_pcp_count);
This increases the cache footprint of a hot vm path. Is it possible to do
the same than what you did for slub? Run a loop over all zones when
draining to check for remaining pcp pages and build the set of cpus
needing IPIs temporarily while draining?
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next prev parent reply other threads:[~2011-10-28 4:11 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-23 15:48 [PATCH v2 0/6] Reduce cross CPU IPI interference Gilad Ben-Yossef
2011-10-23 15:48 ` [PATCH v2 1/6] smp: Introduce a generic on_each_cpu_mask function Gilad Ben-Yossef
2011-10-23 15:48 ` [PATCH v2 2/6] arm: Move arm over to generic on_each_cpu_mask Gilad Ben-Yossef
2011-10-23 15:48 ` [PATCH v2 3/6] tile: Move tile to use " Gilad Ben-Yossef
2011-10-23 15:48 ` [PATCH v2 4/6] mm: Only IPI CPUs to drain local pages if they exist Gilad Ben-Yossef
2011-10-28 4:10 ` Christoph Lameter [this message]
2011-10-28 8:42 ` Gilad Ben-Yossef
2011-10-28 8:43 ` Gilad Ben-Yossef
2011-10-23 15:48 ` [PATCH v2 5/6] slub: Only IPI CPUs that have per cpu obj to flush Gilad Ben-Yossef
2011-10-23 15:48 ` [PATCH v2 6/6] slub: only preallocate cpus_with_slabs if offstack Gilad Ben-Yossef
2011-10-24 5:19 ` Andi Kleen
2011-10-24 6:16 ` Sasha Levin
2011-10-24 8:02 ` Gilad Ben-Yossef
-- strict thread matches above, loose matches on Subject: below --
2011-10-23 15:56 [PATCH v2 0/6] Reduce cross CPU IPI interference Gilad Ben-Yossef
2011-10-23 15:56 ` [PATCH v2 4/6] mm: Only IPI CPUs to drain local pages if they exist Gilad Ben-Yossef
2011-10-28 16:07 ` Rik van Riel
2011-10-29 15:29 ` Gilad Ben-Yossef
2011-11-02 8:53 ` Christoph Lameter
2011-11-10 8:03 ` Gilad Ben-Yossef
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