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From: Andrew Morton <akpm@digeo.com>
To: "linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: NUMA is bust with CONFIG_PREEMPT=y
Date: Wed, 02 Oct 2002 14:46:33 -0700	[thread overview]
Message-ID: <3D9B6939.397DB9EA@digeo.com> (raw)

#define numa_node_id()  (__cpu_to_node(smp_processor_id()))

Either you're going to have to change that to get_cpu_only_on_numa() and
add the matching put_cpu_only_on_numa()'s, or disable preempt in
the config system.

Now, it's probably the case that this happens to work OK;
if you hop CPUs you just end up doing a suboptimal cross-node
operation.  But it'd be better to fix it up, IMO.
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             reply	other threads:[~2002-10-02 21:46 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-10-02 21:46 Andrew Morton [this message]
2002-10-02 21:49 ` NUMA is bust with CONFIG_PREEMPT=y Martin J. Bligh
2002-10-02 22:02   ` Robert Love
2002-10-02 22:04     ` Martin J. Bligh
2002-10-02 22:15       ` Robert Love

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