From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail6.bemta7.messagelabs.com (mail6.bemta7.messagelabs.com [216.82.255.55]) by kanga.kvack.org (Postfix) with ESMTP id BA8EB6B0012 for ; Fri, 10 Jun 2011 14:59:38 -0400 (EDT) Date: Fri, 10 Jun 2011 19:58:58 +0100 From: Russell King - ARM Linux Subject: Re: [PATCH] Make GFP_DMA allocations w/o ZONE_DMA emit a warning instead of failing Message-ID: <20110610185858.GN24424@n2100.arm.linux.org.uk> References: <20110601181918.GO3660@n2100.arm.linux.org.uk> <4DF1C9DE.4070605@jp.fujitsu.com> <20110610004331.13672278.akpm@linux-foundation.org> <20110610091233.GJ24424@n2100.arm.linux.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: David Rientjes Cc: Dmitry Eremin-Solenikov , Andrew Morton , KOSAKI Motohiro , tglx@linutronix.de, linux-mm@kvack.org, linux-kernel@vger.kernel.org, mel@csn.ul.ie, kamezawa.hiroyu@jp.fujitsu.com, riel@redhat.com, pavel@ucw.cz On Fri, Jun 10, 2011 at 11:54:16AM -0700, David Rientjes wrote: > On Fri, 10 Jun 2011, Russell King - ARM Linux wrote: > > > > Should one submit a patch adding a warning to GFP_DMA allocations > > > w/o ZONE_DMA, or the idea of the original patch is wrong? > > > > Linus was far from impressed by the original commit, saying: > > | Using GFP_DMA is reasonable in a driver - on platforms where that > > | matters, it should allocate from the DMA zone, on platforms where it > > | doesn't matter it should be a no-op. > > > > So no, not even a warning. > > > > Any words of wisdom for users with CONFIG_ZONE_DMA=n that actually use > drivers where they need GFP_DMA? The page allocator should just silently > return memory from anywhere? See Linus' reply. I quote again "on platforms where it doesn't matter it should be a no-op". If _you_ have a problem with that _you_ need to discuss it with _Linus_, not me. I'm not going to be a middle-man sitting between two people with different opinions. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org