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Date: Tue, 15 Feb 2011 13:42:55 +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 21:39:03, Rusty Russell wrote: > On Tue, 15 Feb 2011 08:55:50 pm Michal Hocko wrote: > > 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. > > That's an argument against ever printing any message. Well, honestly, I do not see much point for this message but it is there for ages so it maybe it is valueable for somebody... > > What we need to know is why does this happen with virtio_net and not other > cards? The machine just happened to be short on memory due to a strong memory pressure. > If it happens to them too, and they silently fall back, all good. > > I want to make sure we're not papering over a real problem... > > Thanks, > Rusty. -- Michal Hocko SUSE Labs SUSE LINUX s.r.o. Lihovarska 1060/12 190 00 Praha 9 Czech Republic -- 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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