linux-kernel - Re: [PATCH 2/2] SLUB: Use GFP_PANIC for early-boot allocations

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Message-Id: <1241797364.6311.2914.camel@laptop>
Date:	Fri, 08 May 2009 17:42:44 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	Christoph Lameter <cl@...ux-foundation.org>,
	akpm@...ux-foundation.org, gorcunov@...nvz.org,
	kosaki.motohiro@...fujitsu.com, mel@....ul.ie, riel@...hat.com,
	linux-kernel@...r.kernel.org, mingo@...e.hu, rientjes@...gle.com
Subject: Re: [PATCH 2/2] SLUB: Use GFP_PANIC for early-boot allocations

On Fri, 2009-05-08 at 18:36 +0300, Pekka Enberg wrote:
> On Fri, 2009-05-08 at 11:28 -0400, Christoph Lameter wrote:
> > On Fri, 8 May 2009, Pekka Enberg wrote:
> > 
> > > This patch converts SLUB early-boot code to use GFP_PANIC instead of explicit
> > > BUG_ON() calls.
> > 
> > Yirks this is not only early boot code. create_unique_id may be executed
> > whenever a slab is created.
> 
> Argh. We should do -ENOMEM there then. I'll drop that hunk.

BUG_ON((gfp & __GFP_PANIC) && (system_state != STATE_BOOTING));

?

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