From: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
To: Takashi Iwai <tiwai@suse.de>
Cc: linux-mm@kvack.org, akpm@osdl.org
Subject: Re: OOM-killer for zone DMA?
Date: Fri, 27 Aug 2004 16:01:46 -0300 [thread overview]
Message-ID: <20040827190146.GA3332@logos.cnet> (raw)
In-Reply-To: <s5hoekwjz00.wl@alsa2.suse.de>
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.
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next prev parent reply other threads:[~2004-08-27 19:01 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-27 17:02 OOM-killer for zone DMA? Takashi Iwai
2004-08-27 19:01 ` Marcelo Tosatti [this message]
2004-08-28 6:04 ` William Lee Irwin III
2004-08-30 9:35 ` Takashi Iwai
2004-08-28 6:10 ` Nick Piggin
2004-08-30 9:39 ` Takashi Iwai
2004-08-30 10:36 ` Nick Piggin
2004-08-30 15:41 ` Takashi Iwai
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