From: Christoph Lameter <christoph@lameter.com>
To: Eric Dumazet <dada1@cosmosbay.com>
Cc: Andi Kleen <andi@firstfloor.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux kernel <linux-kernel@vger.kernel.org>
Subject: Re: [RFC] SLAB : NUMA cache_free_alien() very expensive because of virt_to_slab(objp); nodeid = slabp->nodeid;
Date: Tue, 20 Mar 2007 17:16:37 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0703201715110.17799@graphe.net> (raw)
In-Reply-To: <46005B7D.3090701@cosmosbay.com>
On Tue, 20 Mar 2007, Eric Dumazet wrote:
> I understand we want to do special things (fallback and such tricks) at
> allocation time, but I believe that we can just trust the real nid of memory
> at free time.
Sorry no. The node at allocation time determines which node specific
structure tracks the slab. If we fall back then the node is allocated
from one node but entered in the node structure of another. Thus you
cannot free the slab without knowing the node at allocation time.
next prev parent reply other threads:[~2007-03-21 0:16 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-20 17:12 Eric Dumazet
2007-03-20 19:54 ` Christoph Lameter
2007-03-20 21:32 ` Andi Kleen
2007-03-20 22:09 ` Eric Dumazet
2007-03-21 0:16 ` Christoph Lameter [this message]
2007-03-21 6:27 ` Eric Dumazet
2007-03-21 6:57 ` [PATCH] SLAB : Use num_possible_cpus() in enable_cpucache() Eric Dumazet
2007-03-21 7:21 ` [PATCH] SLAB : Dont allocate empty shared caches Eric Dumazet
2007-03-21 13:13 ` Pekka Enberg
2007-03-21 13:02 ` [PATCH] SLAB : Use num_possible_cpus() in enable_cpucache() Pekka Enberg
2007-03-21 18:45 ` Christoph Lameter
2007-03-21 7:03 ` [RFC] SLAB : NUMA cache_free_alien() very expensive because of virt_to_slab(objp); nodeid = slabp->nodeid; Christoph Lameter
2007-03-21 7:14 ` Eric Dumazet
2007-03-21 14:35 ` Christoph Lameter
2007-03-21 0:18 ` Christoph Lameter
2007-03-21 2:44 ` Andi Kleen
2007-03-21 3:10 ` Christoph Lameter
2007-03-22 21:28 ` non-NUMA cache_free_alien() (was Re: [RFC] SLAB : NUMA cache_free_alien() very expensive because of virt_to_slab(objp); nodeid = slabp->nodeid;) Siddha, Suresh B
2007-03-22 22:10 ` Christoph Lameter
2007-03-22 22:12 ` Eric Dumazet
2007-03-22 22:40 ` Siddha, Suresh B
2007-03-22 22:56 ` Eric Dumazet
2007-03-23 1:25 ` Christoph Lameter
2007-03-23 14:14 ` Andi Kleen
2007-03-23 14:12 ` Andi Kleen
2007-04-02 22:55 ` Siddha, Suresh B
2007-04-03 0:23 ` Christoph Lameter
2007-04-03 0:31 ` Siddha, Suresh B
2007-04-09 18:01 ` [patch 1/2] x86_64: set node_possible_map at runtime Siddha, Suresh B
2007-04-09 18:07 ` [patch 2/2] slab, x86_64: skip cache_free_alien() on non NUMA Siddha, Suresh B
2007-04-09 20:23 ` [patch 1/2] x86_64: set node_possible_map at runtime Andrew Morton
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