netdev - Re: [PATCH] ovs: do not allocate memory from offline numa node

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Message-Id: <20151005.064451.2162263446408087981.davem@davemloft.net>
Date:	Mon, 05 Oct 2015 06:44:51 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	khlebnikov@...dex-team.ru
Cc:	dev@...nvswitch.org, pshelar@...ira.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, vbabka@...e.cz, linux-mm@...ck.org
Subject: Re: [PATCH] ovs: do not allocate memory from offline numa node

From: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
Date: Fri, 02 Oct 2015 13:18:22 +0300

> When openvswitch tries allocate memory from offline numa node 0:
> stats = kmem_cache_alloc_node(flow_stats_cache, GFP_KERNEL | __GFP_ZERO, 0)
> It catches VM_BUG_ON(nid < 0 || nid >= MAX_NUMNODES || !node_online(nid))
> [ replaced with VM_WARN_ON(!node_online(nid)) recently ] in linux/gfp.h
> This patch disables numa affinity in this case.
> 
> Signed-off-by: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>

Applied, but this should probably use NUMA_NO_NODE unconditionally.
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