linux-kernel - Re: [PATCH] virtio: use __GFP_NOWARN for try_fill_recv in virtnet

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Message-ID: <20110215102549.GD8341@tiehlicka.suse.cz>
Date:	Tue, 15 Feb 2011 11:25:50 +0100
From:	Michal Hocko <mhocko@...e.cz>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	"Michael S. Tsirkin" <mst@...hat.com>,
	virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] virtio: use __GFP_NOWARN for try_fill_recv in
 virtnet_poll

On Tue 15-02-11 20:41:29, Rusty Russell wrote:
> On Tue, 15 Feb 2011 08:05:27 pm Michal Hocko wrote:
> > Hi,
> > we have started seeing a lot of allocator messages complaining about
> > failed allocations from virtnet_poll in soft IRQ. Could you consider the
> > following patch, please?
> 
> Do we really want to silence this?  Isn't warning about it kind of the
> point?  Your network is probably sucking if this happens...

What can user do about it? Is the low level memory allocator message
very much usefull for him?  Maybe we can add a printk_once in the fail
path with some more useful and virtio specific message.

Thanks
-- 
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9    
Czech Republic
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