On Thu, 2015-06-11 at 16:50 -0700, Shaohua Li wrote: > We saw excessive direct memory compaction triggered by skb_page_frag_refill. > This causes performance issues and add latency. Commit 5640f7685831e0 > introduces the order-3 allocation. According to the changelog, the order-3 > allocation isn't a must-have but to improve performance. But direct memory > compaction has high overhead. The benefit of order-3 allocation can't > compensate the overhead of direct memory compaction. > Cc: Eric Dumazet <edumazet@xxxxxxxxxx> > Cc: Chris Mason <clm@xxxxxx> > Cc: Debabrata Banerjee <dbavatar@xxxxxxxxx> > Signed-off-by: Shaohua Li <shli@xxxxxx> > --- Acked-by: Eric Dumazet <edumazet@xxxxxxxxxx> Thanks. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>