Re: [PATCH 0/5] fix exhaustion of ZONE_DMA with swiotlb (in x86 tree)

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From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...>

To: FUJITA Tomonori <fujita.tomonori@...>

Cc: <linux-kernel@...>, <mingo@...>, <joerg.roedel@...>, <tony.luck@...>, <linux-ia64@...>, <iommu@...>

Subject: Re: [PATCH 0/5] fix exhaustion of ZONE_DMA with swiotlb (in x86 tree)

Date: Tuesday, September 9, 2008 - 6:41 am

On Mon, 8 Sep 2008 18:10:09 +0900
FUJITA Tomonori wrote:

> This patchset (against tip/master) fixes the problem that swiotlb

quoted text

> exhausts ZONE_DMA:
>
> http://lkml.org/lkml/2008/8/31/16
>
> The root problem is that swiotlb_alloc_coherent always use ZONE_DMA,
> which is fine for IA64 but not for x86_64.
>
> This patchset makes the callers set up the gfp flags so that
> swiotlb_alloc_coherent can stop playing with the gfp flags.
>
> I think that it would be better to remove the allocation code in
> swiotlb_alloc_coherent theoretically (what swiotlb should do is taking
> care of the swiotlb memory. And swiotlb_alloc_coherent is not useful
> since we use it only when we can't allocate memory reachable by the
> device or we are in out of memory). But that code works for both x86
> and IA64 so it's not so bad, I guess.
>
> #1 is for IA64, #2-4 for x86, and #5 is for swiotlb.
>

Thanks, works well for me :)

Tested-by: KAMEZAWA Hiroyuki

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Messages in current thread:

[PATCH 0/5] fix exhaustion of ZONE_DMA with swiotlb (in x86 ..., FUJITA Tomonori, (Mon Sep 8, 5:10 am)

Re: [PATCH 0/5] fix exhaustion of ZONE_DMA with swiotlb (in ..., KAMEZAWA Hiroyuki, (Tue Sep 9, 6:41 am)

Re: [PATCH 0/5] fix exhaustion of ZONE_DMA with swiotlb (in ..., Joerg Roedel, (Mon Sep 8, 8:00 am)

Re: [PATCH 0/5] fix exhaustion of ZONE_DMA with swiotlb (in ..., Ingo Molnar, (Mon Sep 8, 9:52 am)

[PATCH 1/5] ia64: dma_alloc_coherent always use GFP_DMA, FUJITA Tomonori, (Mon Sep 8, 5:10 am)

[PATCH 2/5] x86: move pci-nommu's dma_mask check to common c..., FUJITA Tomonori, (Mon Sep 8, 5:10 am)

Re: [PATCH 2/5] x86: move pci-nommu's dma_mask check to comm..., Joerg Roedel, (Mon Sep 8, 8:01 am)

[PATCH 3/5] x86: fix nommu_alloc_coherent allocation with NU..., FUJITA Tomonori, (Mon Sep 8, 5:10 am)

Re: [PATCH 3/5] x86: fix nommu_alloc_coherent allocation wit..., Joerg Roedel, (Mon Sep 8, 8:01 am)

[PATCH 4/5] x86: dma_alloc_coherent sets gfp flags properly, FUJITA Tomonori, (Mon Sep 8, 5:10 am)

Re: [PATCH 4/5] x86: dma_alloc_coherent sets gfp flags prope..., Joerg Roedel, (Mon Sep 8, 8:01 am)

[PATCH 5/5] swiotlb: remove GFP_DMA hack in swiotlb_alloc_co..., FUJITA Tomonori, (Mon Sep 8, 5:10 am)

Re: [PATCH 5/5] swiotlb: remove GFP_DMA hack in swiotlb_allo..., Joerg Roedel, (Mon Sep 8, 8:02 am)


linux-kernel:
monstr	[PATCH 11/60] microblaze_v4: cache support
Andrew Morton	Re: x86: 4kstacks default
Greg KH	[GIT PATCH] driver core patches against 2.6.24
Alan Cox	Re: Dual-Licensing Linux Kernel with GPL V2 and GPL V3
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linux-netdev:
Jarek Poplawski	[PATCH] pkt_sched: Destroy gen estimators under rtnl_lock().
Ben Hutchings	Re: [GIT]: Networking
Gerrit Renker	[PATCH 03/37] dccp: List management for new feature negotiation
Jiri Olsa	[PATCHv5 0/2] net: fix race in the receive/select
openbsd-misc: