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

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Message-ID: <20100226173115.GG16335@basil.fritz.box>
Date:	Fri, 26 Feb 2010 18:31:15 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Christoph Lameter <cl@...ux-foundation.org>
Cc:	Andi Kleen <andi@...stfloor.org>,
	David Rientjes <rientjes@...gle.com>,
	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, Feb 26, 2010 at 11:24:50AM -0600, Christoph Lameter wrote:
> On Fri, 26 Feb 2010, Andi Kleen wrote:
> 
> > > > Memory hotplug with node add never quite worked on x86 before,
> > > > for various reasons not related to slab.
> > >
> > > Ok but why did things break in such a big way?
> >
> > 1) numa memory hotadd never worked
> 
> Well Kamesan indicated that this worked if a cpu became online.

I mean in the general case. There were tons of problems all over.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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