netdev - Re: [PATCH net-next v2 1/4] net: allow > 0 order atomic page alloc in skb_page_frag

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Message-ID: <1389210371.31367.8.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Wed, 08 Jan 2014 11:46:11 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	Michael Dalton <mwdalton@...gle.com>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	Eric Dumazet <edumazet@...gle.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Jason Wang <jasowang@...hat.com>,
	virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH net-next v2 1/4] net: allow > 0 order atomic page alloc
 in skb_page_frag_refill

On Wed, 2014-01-08 at 21:18 +0200, Michael S. Tsirkin wrote:
> On Wed, Jan 08, 2014 at 10:26:03AM -0800, Eric Dumazet wrote:
> > On Wed, 2014-01-08 at 20:08 +0200, Michael S. Tsirkin wrote:
> > 
> > > Eric said we also need a patch to add __GFP_NORETRY, right?
> > > Probably before this one in series.
> > 
> > Nope, this __GFP_NORETRY has nothing to do with this.
> > 
> > I am not yet convinced we want it.
> > 
> > This needs mm guys advice, as its a tradeoff for mm layer more than
> > networking...
> 
> Well maybe Cc linux-mm then?

Well, I do not care of people mlocking the memory and complaining that
compaction does not work.

If these people care, they should contact mm guys, eventually.

Really this is an issue that has nothing to do with this patch set.



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