linux-kernel - Re: [PATCH] [4/4] SLAB: Fix node add timer race in cache

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Message-ID: <alpine.DEB.2.00.1002261555030.32111@chino.kir.corp.google.com>
Date:	Fri, 26 Feb 2010 16:01:08 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Christoph Lameter <cl@...ux-foundation.org>
cc:	Andi Kleen <andi@...stfloor.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Nick Piggin <npiggin@...e.de>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, haicheng.li@...el.com,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [PATCH] [4/4] SLAB: Fix node add timer race in cache_reap

On Fri, 26 Feb 2010, Christoph Lameter wrote:

> > 1) numa memory hotadd never worked
> 
> Well Kamesan indicated that this worked if a cpu became online.
> 

That may be true, but it doesn't address hotpluggable 
ACPI_SRAT_MEM_HOT_PLUGGABLE entries for CONFIG_MEMORY_HOTPLUG_SPARSE where 
no cpus are being onlined or writing to /sys/devices/system/memory/probe 
for CONFIG_ARCH_MEMORY_PROBE.

> > 2) the rest just bitrotted because nobody tested it.
> 
> Yep. David: Can you revise the relevant portions of the patchset and
> repost it?
> 

Ok.
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