mm/zswap: NUMA aware allocation for zswap_dstmem

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@google.com>
Acked-by: Seth Jennings <sjennings@variantweb.net>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/zswap.c b/mm/zswap.c
index aeaef0f..008388f 100644 (file)
--- a/mm/zswap.c
+++ b/mm/zswap.c
@@ -347,7 +347,7 @@ static int __zswap_cpu_notifier(unsigned long action, unsigned long cpu)
                        return NOTIFY_BAD;
                }
                *per_cpu_ptr(zswap_comp_pcpu_tfms, cpu) = tfm;
-               dst = kmalloc(PAGE_SIZE * 2, GFP_KERNEL);
+               dst = kmalloc_node(PAGE_SIZE * 2, GFP_KERNEL, cpu_to_node(cpu));
                if (!dst) {
                        pr_err("can't allocate compressor buffer\n");
                        crypto_free_comp(tfm);