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Date: Thu, 06 Feb 2014 22:29:32 -0800 (PST) From: David Miller <davem@...emloft.net> To: eric.dumazet@...il.com Cc: netdev@...r.kernel.org, rientjes@...gle.com, linux-kernel@...r.kernel.org Subject: Re: [PATCH] net: use __GFP_NORETRY for high order allocations From: Eric Dumazet <eric.dumazet@...il.com> Date: Thu, 06 Feb 2014 10:42:42 -0800 > From: Eric Dumazet <edumazet@...gle.com> > > sock_alloc_send_pskb() & sk_page_frag_refill() > have a loop trying high order allocations to prepare > skb with low number of fragments as this increases performance. > > Problem is that under memory pressure/fragmentation, this can > trigger OOM while the intent was only to try the high order > allocations, then fallback to order-0 allocations. > > We had various reports from unexpected regressions. > > According to David, setting __GFP_NORETRY should be fine, > as the asynchronous compaction is still enabled, and this > will prevent OOM from kicking as in : ... > Signed-off-by: Eric Dumazet <edumazet@...gle.com> > Acked-by: David Rientjes <rientjes@...gle.com> Applied, do we want this for -stable? -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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