[PATCH] cgroup: prefer [kv]zalloc over [kv]malloc+memset in memory controller code.

Johannes Weiner hannes at cmpxchg.org
Mon Nov 1 13:01:22 PDT 2010

On Mon, Nov 01, 2010 at 08:40:56PM +0100, Jesper Juhl wrote:
> Hi (please CC me on replies),
> Apologies to those who receive this multiple times. I screwed up the To: 
> field in my original mail :-(
> In mem_cgroup_alloc() we currently do either kmalloc() or vmalloc() then 
> followed by memset() to zero the memory. This can be more efficiently 
> achieved by using kzalloc() and vzalloc().
> Signed-off-by: Jesper Juhl <jj at chaosbits.net>

Looks good to me, but there is also the memset after kmalloc in
alloc_mem_cgroup_per_zone_info().  Can you switch that over as well in
this patch?  You can pass __GFP_ZERO to kmalloc_node() for zeroing.


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