From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <413021BA.3090908@yahoo.com.au> Date: Sat, 28 Aug 2004 16:10:02 +1000 From: Nick Piggin MIME-Version: 1.0 Subject: Re: OOM-killer for zone DMA? References: In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Takashi Iwai Cc: linux-mm@kvack.org List-ID: 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... > They easily could. > 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). > You at least need __GFP_NORETRY to achieve what you want. -- 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