From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 27 Aug 2004 16:01:46 -0300 From: Marcelo Tosatti Subject: Re: OOM-killer for zone DMA? Message-ID: <20040827190146.GA3332@logos.cnet> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org Return-Path: To: Takashi Iwai Cc: linux-mm@kvack.org, akpm@osdl.org List-ID: On Fri, Aug 27, 2004 at 07:02:07PM +0200, Takashi Iwai wrote: > Hi, > > In the primary version of my DMA allocation patch, I tried to allocate > pages with GFP_DMA as much as possible, then allocate with GFP_KERNEL > as fallback. But this doesn't work. When the zone DMA is exhausted, > I oberseved endless OOM-killer. > > Is this a desired behavior? I don't think triggering OOM-killer for > zone DMA makes sense, because apps don't allocate pages in this > area... > > Note that the driver tried to allocate bunch of single pages with > GFP_DMA, not big pages, by calling dma_alloc_coherent with GFP_DMA > only (no __GFP_REPEAT or such modifiers). Takashi, The OOM killer heuristics seems to be pretty screwed up in current v2.6. Must be fixed ASAP. -- 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/ . Don't email: aart@kvack.org