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Date: Thu, 12 Jan 2017 13:49:42 +0000
From: Mel Gorman <mgorman@suse.de>
Subject: Re: [PATCH 4/4] lib/show_mem.c: teach show_mem to work with the
 given nodemask
Message-ID: <20170112134942.46d6adcjshfeyj4r@suse.de>
References: <20170112131659.23058-1-mhocko@kernel.org>
 <20170112131659.23058-5-mhocko@kernel.org>
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In-Reply-To: <20170112131659.23058-5-mhocko@kernel.org>
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To: Michal Hocko <mhocko@kernel.org>
Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>, Johannes Weiner <hannes@cmpxchg.org>, David Rientjes <rientjes@google.com>, Michal Hocko <mhocko@suse.com>

On Thu, Jan 12, 2017 at 02:16:59PM +0100, Michal Hocko wrote:
> From: Michal Hocko <mhocko@suse.com>
> 
> show_mem() allows to filter out node specific data which is irrelevant
> to the allocation request via SHOW_MEM_FILTER_NODES. The filtering
> is done in skip_free_areas_node which skips all nodes which are not
> in the mems_allowed of the current process. This works most of the
> time as expected because the nodemask shouldn't be outside of the
> allocating task but there are some exceptions. E.g. memory hotplug might
> want to request allocations from outside of the allowed nodes (see
> new_node_page).
> 
> Get rid of this hardcoded behavior and push the allocation mask down the
> show_mem path and use it instead of cpuset_current_mems_allowed. NULL
> nodemask is interpreted as cpuset_current_mems_allowed.
> 
> Signed-off-by: Michal Hocko <mhocko@suse.com>

Fairly marginal but

Acked-by: Mel Gorman <mgorman@suse.de>

-- 
Mel Gorman
SUSE Labs

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