From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 30 Aug 2004 11:35:09 +0200 Message-ID: From: Takashi Iwai Subject: Re: OOM-killer for zone DMA? In-Reply-To: <20040828060426.GI2793@holomorphy.com> References: <20040828060426.GI2793@holomorphy.com> MIME-Version: 1.0 (generated by SEMI 1.14.5 - "Awara-Onsen") Content-Type: text/plain; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: William Lee Irwin III Cc: linux-mm@kvack.org List-ID: At Fri, 27 Aug 2004 23:04:26 -0700, William Lee Irwin III wrote: > > On Fri, Aug 27, 2004 at 07:02:07PM +0200, Takashi Iwai wrote: > > 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). > > How are you triggering this? Tried to allocate as many single pages as possible with dma_alloc_coherent() with 31bit coherent_dma_mask. Takashi -- 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