From: Pekka Enberg <penberg@kernel.org>
To: Christoph Lameter <cl@gentwo.org>
Cc: Gilad Ben-Yossef <gilad@benyossef.com>,
linux-kernel@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, Matt Mackall <mpm@selenic.com>,
Sasha Levin <levinsasha928@gmail.com>
Subject: Re: [PATCH v2 6/6] slub: only preallocate cpus_with_slabs if offstack
Date: Sun, 06 Nov 2011 21:10:18 +0200 [thread overview]
Message-ID: <1320606618.1428.76.camel@jaguar> (raw)
In-Reply-To: <alpine.DEB.2.00.1111020351350.23788@router.home>
On Fri, 28 Oct 2011, Gilad Ben-Yossef wrote:
> > I think if it is up to me, I recommend going the simpler route that
> > does the allocation in flush_all using GFP_ATOMIC for
> > CPUMASK_OFFSTACK=y and sends an IPI to all CPUs if it fails, because
> > it is simpler code and in the end I believe it is also correct.
On Wed, 2011-11-02 at 03:52 -0500, Christoph Lameter wrote:
> I support that. Pekka?
Sure. I'm OK with that. Someone needs to run some tests to make sure
it's working with low memory conditions when GFP_ATOMIC allocations
fail, though.
Pekka
WARNING: multiple messages have this Message-ID (diff)
From: Pekka Enberg <penberg@kernel.org>
To: Christoph Lameter <cl@gentwo.org>
Cc: Gilad Ben-Yossef <gilad@benyossef.com>,
linux-kernel@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, Matt Mackall <mpm@selenic.com>,
Sasha Levin <levinsasha928@gmail.com>
Subject: Re: [PATCH v2 6/6] slub: only preallocate cpus_with_slabs if offstack
Date: Sun, 06 Nov 2011 21:10:18 +0200 [thread overview]
Message-ID: <1320606618.1428.76.camel@jaguar> (raw)
In-Reply-To: <alpine.DEB.2.00.1111020351350.23788@router.home>
On Fri, 28 Oct 2011, Gilad Ben-Yossef wrote:
> > I think if it is up to me, I recommend going the simpler route that
> > does the allocation in flush_all using GFP_ATOMIC for
> > CPUMASK_OFFSTACK=y and sends an IPI to all CPUs if it fails, because
> > it is simpler code and in the end I believe it is also correct.
On Wed, 2011-11-02 at 03:52 -0500, Christoph Lameter wrote:
> I support that. Pekka?
Sure. I'm OK with that. Someone needs to run some tests to make sure
it's working with low memory conditions when GFP_ATOMIC allocations
fail, though.
Pekka
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next prev parent reply other threads:[~2011-11-06 19:10 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-23 15:56 [PATCH v2 0/6] Reduce cross CPU IPI interference Gilad Ben-Yossef
2011-10-23 15:56 ` Gilad Ben-Yossef
2011-10-23 15:56 ` [PATCH v2 1/6] smp: Introduce a generic on_each_cpu_mask function Gilad Ben-Yossef
2011-10-23 15:56 ` Gilad Ben-Yossef
2011-10-23 15:56 ` [PATCH v2 2/6] arm: Move arm over to generic on_each_cpu_mask Gilad Ben-Yossef
2011-10-23 15:56 ` Gilad Ben-Yossef
2011-10-23 15:56 ` [PATCH v2 3/6] tile: Move tile to use " Gilad Ben-Yossef
2011-10-23 15:56 ` 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
2011-10-23 15:56 ` Gilad Ben-Yossef
2011-10-28 16:07 ` Rik van Riel
2011-10-28 16:07 ` Rik van Riel
2011-10-29 15:29 ` Gilad Ben-Yossef
2011-10-29 15:29 ` Gilad Ben-Yossef
2011-11-02 8:53 ` Christoph Lameter
2011-11-10 8:03 ` Gilad Ben-Yossef
2011-11-10 8:03 ` Gilad Ben-Yossef
2011-10-23 15:56 ` [PATCH v2 5/6] slub: Only IPI CPUs that have per cpu obj to flush Gilad Ben-Yossef
2011-10-23 15:56 ` Gilad Ben-Yossef
2011-10-28 4:06 ` Christoph Lameter
2011-10-28 4:06 ` Christoph Lameter
2011-10-28 8:50 ` Gilad Ben-Yossef
2011-10-28 8:50 ` Gilad Ben-Yossef
2011-10-23 15:56 ` [PATCH v2 6/6] slub: only preallocate cpus_with_slabs if offstack Gilad Ben-Yossef
2011-10-23 15:56 ` Gilad Ben-Yossef
2011-10-28 4:06 ` Christoph Lameter
2011-10-28 4:06 ` Christoph Lameter
2011-10-28 9:09 ` Gilad Ben-Yossef
2011-10-28 9:09 ` Gilad Ben-Yossef
2011-11-02 8:52 ` Christoph Lameter
2011-11-02 8:52 ` Christoph Lameter
2011-11-06 19:10 ` Pekka Enberg [this message]
2011-11-06 19:10 ` Pekka Enberg
2011-11-13 8:39 ` Gilad Ben-Yossef
2011-11-13 8:39 ` Gilad Ben-Yossef
-- strict thread matches above, loose matches on Subject: below --
2011-10-23 15:48 [PATCH v2 0/6] Reduce cross CPU IPI interference 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
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