From: Peter Zijlstra <peterz@infradead.org>
To: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Christoph Lameter <cl@linux-foundation.org>,
akpm@linux-foundation.org, gorcunov@openvz.org,
kosaki.motohiro@jp.fujitsu.com, mel@csn.ul.ie, riel@redhat.com,
linux-kernel@vger.kernel.org, mingo@elte.hu, rientjes@google.com
Subject: Re: [PATCH 2/2] SLUB: Use GFP_PANIC for early-boot allocations
Date: Fri, 08 May 2009 17:50:58 +0200 [thread overview]
Message-ID: <1241797858.6311.2925.camel@laptop> (raw)
In-Reply-To: <1241797558.28600.68.camel@penberg-laptop>
On Fri, 2009-05-08 at 18:45 +0300, Pekka Enberg wrote:
> On Fri, 2009-05-08 at 17:42 +0200, Peter Zijlstra wrote:
> > BUG_ON((gfp & __GFP_PANIC) && (system_state != STATE_BOOTING));
>
> There's no technical reason not to use GFP_PANIC when system_state !=
> STATE_BOOTING so I don't think it's needed. It's just that GFP_PANIC
> (and BUG_ON) is IMHO too harsh for create_unique_id().
Shouldn't we handle every allocation failure after booting?
I think it _is_ a bug to panic on allocation failures once we're
running.
I'm really not very fond of __GFP_PANIC as it stands, it seems to
suggest its OK to ignore allocation failures, which would bring us back
to the original UNIX error handling :/
next prev parent reply other threads:[~2009-05-08 15:52 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-08 15:10 Pekka Enberg
2009-05-08 15:23 ` Cyrill Gorcunov
2009-05-08 15:28 ` Christoph Lameter
2009-05-08 15:36 ` Pekka Enberg
2009-05-08 15:42 ` Peter Zijlstra
2009-05-08 15:45 ` Pekka Enberg
2009-05-08 15:50 ` Peter Zijlstra [this message]
2009-05-08 16:15 ` Cyrill Gorcunov
2009-05-08 16:31 ` Peter Zijlstra
2009-05-08 16:42 ` Christoph Lameter
2009-05-08 16:49 ` Cyrill Gorcunov
2009-05-09 8:30 ` Ingo Molnar
2009-05-08 15:42 ` Pekka Enberg
2009-05-09 8:30 ` Ingo Molnar
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