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From: Grant Grundler <iod00d@hp.com>
To: "Luck, Tony" <tony.luck@intel.com>,
	Christoph Hellwig <hch@infradead.org>,
	linux-kernel@vger.kernel.org, discuss@x86-64.org,
	linux-ia64@vger.kernel.org, ak@suse.de, "Mallick,
	Asit K" <asit.k.mallick@intel.com>
Subject: Re: [patch 2.6.13 0/6] swiotlb maintenance and x86_64 dma_sync_single_range_for_{cpu,device}
Date: Fri, 23 Sep 2005 21:38:51 +0000	[thread overview]
Message-ID: <20050923213851.GA6242@esmail.cup.hp.com> (raw)
In-Reply-To: <20050923185021.GC6576@tuxdriver.com>

On Fri, Sep 23, 2005 at 02:50:23PM -0400, John W. Linville wrote:
> On Fri, Sep 23, 2005 at 11:27:26AM -0700, Luck, Tony wrote:
> > >> It should just go away once the GFP_DMA32 code is merged.
> > >
> > >Is that the plan?  I suppose it makes sense.
> 
> > I don't have a good (or in fact any) understanding of the impact
> > of GFP_DMA32 on ia64.  People tell me it will all be good, but I'd
> > like to hear from someone running it.
>  
> All the patches I saw were for x86_64.  So, the impact on ia64 should
> be minimal... :-)

impact to arch/ia64 might be minimal. My understanding was
all the drivers that support 32-bit devices would need tweaks
to use GFP_DMA32 flag.  Is this still the plan?
	http://www.ussg.iu.edu/hypermail/linux/kernel/9901.3/0323.html

Most of what I've read in Andi's patch otherwise makes sense:
	http://lwn.net/Articles/152337/

But I didn't see Andi suggest that swiotlb should go completely away.

thanks,
grant

WARNING: multiple messages have this Message-ID (diff)
From: Grant Grundler <iod00d@hp.com>
To: "Luck, Tony" <tony.luck@intel.com>,
	Christoph Hellwig <hch@infradead.org>,
	linux-kernel@vger.kernel.org, discuss@x86-64.org,
	linux-ia64@vger.kernel.org, ak@suse.de, "Mallick,
	Asit K" <asit.k.mallick@intel.com>
Subject: Re: [patch 2.6.13 0/6] swiotlb maintenance and x86_64 dma_sync_single_range_for_{cpu,device}
Date: Fri, 23 Sep 2005 14:38:51 -0700	[thread overview]
Message-ID: <20050923213851.GA6242@esmail.cup.hp.com> (raw)
In-Reply-To: <20050923185021.GC6576@tuxdriver.com>

On Fri, Sep 23, 2005 at 02:50:23PM -0400, John W. Linville wrote:
> On Fri, Sep 23, 2005 at 11:27:26AM -0700, Luck, Tony wrote:
> > >> It should just go away once the GFP_DMA32 code is merged.
> > >
> > >Is that the plan?  I suppose it makes sense.
> 
> > I don't have a good (or in fact any) understanding of the impact
> > of GFP_DMA32 on ia64.  People tell me it will all be good, but I'd
> > like to hear from someone running it.
>  
> All the patches I saw were for x86_64.  So, the impact on ia64 should
> be minimal... :-)

impact to arch/ia64 might be minimal. My understanding was
all the drivers that support 32-bit devices would need tweaks
to use GFP_DMA32 flag.  Is this still the plan?
	http://www.ussg.iu.edu/hypermail/linux/kernel/9901.3/0323.html

Most of what I've read in Andi's patch otherwise makes sense:
	http://lwn.net/Articles/152337/

But I didn't see Andi suggest that swiotlb should go completely away.

thanks,
grant

  reply	other threads:[~2005-09-23 21:38 UTC|newest]

Thread overview: 99+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-08-29 20:09 [patch 2.6.13] x86_64: implement dma_sync_single_range_for_{cpu,device} John W. Linville
2005-08-29 20:54 ` Andi Kleen
2005-08-29 21:48   ` John W. Linville
2005-08-30  1:14     ` [discuss] " Andi Kleen
2005-08-30 17:54       ` John W. Linville
2005-08-30 17:58         ` [patch 2.6.13] swiotlb: add swiotlb_sync_single_range_for_{cpu,device} John W. Linville
2005-08-30 17:58           ` John W. Linville
2005-08-30 18:00           ` [patch 2.6.13] x86_64: implement dma_sync_single_range_for_{cpu,device} John W. Linville
2005-08-30 18:03           ` [patch 2.6.13] swiotlb: add swiotlb_sync_single_range_for_{cpu,device} Luck, Tony
2005-08-30 18:03             ` Luck, Tony
2005-08-30 18:09             ` John W. Linville
2005-08-30 18:09               ` John W. Linville
2005-08-30 18:33               ` [rfc patch] swiotlb: consolidate swiotlb_sync_single_* implementations John W. Linville
2005-08-30 18:33                 ` John W. Linville
2005-08-30 18:40                 ` [rfc patch] swiotlb: consolidate swiotlb_sync_sg_* implementations John W. Linville
2005-08-30 18:40                   ` John W. Linville
2005-09-12 14:48               ` [patch 2.6.13 0/6] swiotlb maintenance and x86_64 dma_sync_single_range_for_{cpu,device} John W. Linville
2005-09-12 14:48                 ` John W. Linville
2005-09-12 14:48                 ` [patch 2.6.13 1/6] swiotlb: move from arch/ia64/lib to lib John W. Linville
2005-09-12 14:48                   ` John W. Linville
2005-09-12 14:48                   ` [patch 2.6.13 2/6] swiotlb: cleanup some code duplication cruft John W. Linville
2005-09-12 14:48                     ` John W. Linville
2005-09-12 14:48                     ` [patch 2.6.13 3/6] swiotlb: support syncing sub-ranges of mappings John W. Linville
2005-09-12 14:48                       ` John W. Linville
2005-09-12 14:48                       ` [patch 2.6.13 4/6] swiotlb: support syncing DMA_BIDIRECTIONAL mappings John W. Linville
2005-09-12 14:48                         ` John W. Linville
2005-09-12 14:48                         ` [patch 2.6.13 5/6] swiotlb: file header comments John W. Linville
2005-09-12 14:48                           ` John W. Linville
2005-09-12 14:48                           ` [patch 2.6.13 6/6] x86_64: implement dma_sync_single_range_for_{cpu,device} John W. Linville
2005-09-12 15:22                             ` Andi Kleen
2005-09-12 18:51                         ` [patch 2.6.13 4/6] swiotlb: support syncing DMA_BIDIRECTIONAL mappings Grant Grundler
2005-09-12 18:51                           ` Grant Grundler
2005-09-12 19:51                           ` John W. Linville
2005-09-12 19:51                             ` John W. Linville
2005-09-12 19:53                             ` [patch 2.6.13] swiotlb: BUG() for DMA_NONE in sync_single John W. Linville
2005-09-12 19:53                               ` John W. Linville
2005-09-12 20:23                               ` Grant Grundler
2005-09-12 20:23                                 ` Grant Grundler
2005-09-12 23:45                                 ` [patch 2.6.13 (take #2)] " John W. Linville
2005-09-12 23:45                                   ` John W. Linville
2005-09-12 23:59                                   ` Grant Grundler
2005-09-12 23:59                                     ` Grant Grundler
2005-09-13  4:05                                   ` [discuss] " Andi Kleen
2005-09-13  4:05                                     ` Andi Kleen
2005-09-22 20:37                 ` [patch 2.6.13 0/6] swiotlb maintenance and x86_64 dma_sync_single_range_for_{cpu,device} Luck, Tony
2005-09-22 20:37                   ` Luck, Tony
2005-09-22 20:41                   ` Christoph Hellwig
2005-09-22 20:41                     ` Christoph Hellwig
2005-09-23 18:22                     ` John W. Linville
2005-09-23 18:22                       ` John W. Linville
2005-09-23 18:31                       ` Muli Ben-Yehuda
2005-09-23 18:31                         ` Muli Ben-Yehuda
2005-09-23 18:27                 ` Luck, Tony
2005-09-23 18:27                   ` Luck, Tony
2005-09-23 18:50                   ` John W. Linville
2005-09-23 18:50                     ` John W. Linville
2005-09-23 21:38                     ` Grant Grundler [this message]
2005-09-23 21:38                       ` Grant Grundler
2005-09-26  7:01                   ` Andi Kleen
2005-09-26  7:01                     ` Andi Kleen
2005-09-26 21:01                   ` [patch 2.6.14-rc2 0/5] " John W. Linville
2005-09-26 21:01                     ` John W. Linville
2005-09-26 21:01                     ` [patch 2.6.14-rc2 1/5] swiotlb: move from arch/ia64/lib to drivers/pci John W. Linville
2005-09-26 21:01                       ` John W. Linville
2005-09-26 21:01                       ` [patch 2.6.14-rc2 2/5] swiotlb: cleanup some code duplication cruft John W. Linville
2005-09-26 21:01                         ` John W. Linville
2005-09-26 21:01                         ` [patch 2.6.14-rc2 3/5] swiotlb: support syncing sub-ranges of mappings John W. Linville
2005-09-26 21:01                           ` John W. Linville
2005-09-26 21:01                           ` [patch 2.6.14-rc2 4/5] swiotlb: support syncing DMA_BIDIRECTIONAL mappings John W. Linville
2005-09-26 21:01                             ` John W. Linville
2005-09-26 21:01                             ` [patch 2.6.14-rc2 5/5] swiotlb: file header comments John W. Linville
2005-09-26 21:01                               ` John W. Linville
2005-09-26 21:33                     ` [patch 2.6.14-rc2 0/5] swiotlb maintenance and x86_64 dma_sync_single_range_for_{cpu,device} Matthew Wilcox
2005-09-26 21:33                       ` Matthew Wilcox
2005-09-26 21:54                       ` John W. Linville
2005-09-26 21:54                         ` John W. Linville
2005-09-26 22:08                     ` Luck, Tony
2005-09-26 22:08                       ` Luck, Tony
2005-09-26 22:46                       ` Grant Grundler
2005-09-26 22:46                         ` Grant Grundler
2005-09-27  0:14                         ` John W. Linville
2005-09-27  0:14                           ` John W. Linville
2005-09-27  2:47                           ` Tony Luck
2005-09-27  2:47                             ` Tony Luck
2005-09-28 21:50                             ` [patch 2.6.14-rc2 0/6] " John W. Linville
2005-09-28 21:50                               ` John W. Linville
2005-09-28 21:50                               ` [patch 2.6.14-rc2 1/6] swiotlb: move from arch/ia64/lib/ to lib/ John W. Linville
2005-09-28 21:50                                 ` John W. Linville
2005-09-28 21:50                                 ` [patch 2.6.14-rc2 2/6] swiotlb: cleanup some code duplication cruft John W. Linville
2005-09-28 21:50                                   ` John W. Linville
2005-09-28 21:50                                   ` [patch 2.6.14-rc2 3/6] swiotlb: support syncing sub-ranges of mappings John W. Linville
2005-09-28 21:50                                     ` John W. Linville
2005-09-28 21:50                                     ` [patch 2.6.14-rc2 4/6] swiotlb: support syncing DMA_BIDIRECTIONAL mappings John W. Linville
2005-09-28 21:50                                       ` John W. Linville
2005-09-28 21:50                                       ` [patch 2.6.14-rc2 5/6] swiotlb: file header comments John W. Linville
2005-09-28 21:50                                         ` John W. Linville
2005-09-28 21:50                                         ` [patch 2.6.14-rc2 6/6] x86_64: implement dma_sync_single_range_for_{cpu,device} John W. Linville
2005-09-29 22:42                               ` [patch 2.6.14-rc2 0/6] swiotlb maintenance and x86_64 dma_sync_single_range_for_{cpu,device} Luck, Tony
2005-09-29 22:42                                 ` Luck, Tony

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