linux-kernel - Re: [PATCH] mm-slab: allocate kmem_cache with __GFP

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Message-ID: <1311172859.2338.31.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC>
Date:	Wed, 20 Jul 2011 16:40:59 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Konstantin Khlebnikov <khlebnikov@...allels.com>
Cc:	Mel Gorman <mgorman@...e.de>, Christoph Lameter <cl@...ux.com>,
	Pekka Enberg <penberg@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Matt Mackall <mpm@...enic.com>
Subject: Re: [PATCH] mm-slab: allocate kmem_cache with __GFP_REPEAT

Le mercredi 20 juillet 2011 à 18:32 +0400, Konstantin Khlebnikov a
écrit :

> I catch this on our rhel6-openvz kernel, and yes it very patchy,
> but I don't see any reasons why this cannot be reproduced on mainline kernel.
> 
> there was abount ten containers with random stuff, node already do intensive swapout but still alive,
> in this situation starting new containers sometimes (1 per 1000) fails due to kmem_cache_create failures in nf_conntrack,
> there no other messages except:
> Unable to create nf_conn slab cache
> and some
> nf_conntrack: falling back to vmalloc.
> (it try allocates huge hash table and do it via vmalloc if kmalloc fails)


Does this kernel contain commit 6d4831c2 ?
(vfs: avoid large kmalloc()s for the fdtable)



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