Re: [PATCH] mm/zswap : NUMA aware allocation for zswap_dstmem

[David Rientjes]

On Tue, 27 May 2014, Eric Dumazet wrote:

> From: Eric Dumazet <edumazet@xxxxxxxxxx>
> 
> zswap_dstmem is a percpu block of memory, which should
> be allocated using kmalloc_node(), to get better NUMA
> locality.
> 
> Without it, all the blocks are allocated from a single node.
> 
> Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>

Acked-by: David Rientjes <rientjes@xxxxxxxxxx>

cpu_to_node(cpu) should return the correct node that was parsed from the 
SRAT on x86 at boot during CPU_UP_PREPARE.  If any platform returns 
NUMA_NO_NODE, the worst case scenario is that we get local allocation 
anyway.
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