Date: Fri, 26 Feb 2010 16:57:55 +0100
From: Andi Kleen <andi@firstfloor.org>
To: Christoph Lameter <cl@linux-foundation.org>
Cc: Andi Kleen <andi@firstfloor.org>, David Rientjes <rientjes@google.com>,
       Pekka Enberg <penberg@cs.helsinki.fi>, Nick Piggin <npiggin@suse.de>,
       linux-kernel@vger.kernel.org, linux-mm@kvack.org, haicheng.li@intel.com,
       KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [PATCH] [4/4] SLAB: Fix node add timer race in cache_reap
Message-ID: <20100226155755.GE16335@basil.fritz.box>
References: <20100215105253.GE21783@one.firstfloor.org> <20100215110135.GN5723@laptop> <alpine.DEB.2.00.1002191222320.26567@router.home> <20100220090154.GB11287@basil.fritz.box> <alpine.DEB.2.00.1002240949140.26771@router.home> <4B862623.5090608@cs.helsinki.fi> <alpine.DEB.2.00.1002242357450.26099@chino.kir.corp.google.com> <alpine.DEB.2.00.1002251228140.18861@router.home> <20100226114136.GA16335@basil.fritz.box> <alpine.DEB.2.00.1002260904311.6641@router.home>
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On Fri, Feb 26, 2010 at 09:04:56AM -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
2) the rest just bitrotted because nobody tested it.

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