From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v3 1/2] omap3: iovmm: Work around sg_alloc_table size limitation in IOMMU
Date: Mon, 6 Jun 2011 19:00:52 +0100 [thread overview]
Message-ID: <20110606180052.GB9456@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <201106061854.10450.laurent.pinchart@ideasonboard.com>
On Mon, Jun 06, 2011 at 06:54:10PM +0200, Laurent Pinchart wrote:
> Of course not, but if the scatterlist is only touched by kernel code, it
> doesn't need to be contiguous in memory. It could be allocated with vmalloc().
Except vmalloc has a higher latency and a more restrictive API than
other allocators (think about the coherency issues with SMP systems
which may have to do TLB flushing on several cores, etc.)
WARNING: multiple messages have this Message-ID (diff)
From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 1/2] omap3: iovmm: Work around sg_alloc_table size limitation in IOMMU
Date: Mon, 6 Jun 2011 19:00:52 +0100 [thread overview]
Message-ID: <20110606180052.GB9456@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <201106061854.10450.laurent.pinchart@ideasonboard.com>
On Mon, Jun 06, 2011 at 06:54:10PM +0200, Laurent Pinchart wrote:
> Of course not, but if the scatterlist is only touched by kernel code, it
> doesn't need to be contiguous in memory. It could be allocated with vmalloc().
Except vmalloc has a higher latency and a more restrictive API than
other allocators (think about the coherency issues with SMP systems
which may have to do TLB flushing on several cores, etc.)
next prev parent reply other threads:[~2011-06-06 18:01 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-30 12:47 [PATCH 0/2] OMAP3 IOMMU fixes Laurent Pinchart
2011-05-30 12:47 ` [PATCH 1/2] omap3: iovmm: Work around sg_alloc_table size limitation in IOMMU Laurent Pinchart
2011-05-31 13:22 ` Tony Lindgren
2011-06-01 12:25 ` [PATCH v2 " Laurent Pinchart
2011-06-01 13:11 ` Tony Lindgren
2011-06-01 12:25 ` [PATCH v2 2/2] omap3: iovmm: Support non page-aligned buffers in iommu_vmap Laurent Pinchart
2011-06-01 12:50 ` Tony Lindgren
2011-06-01 13:09 ` Laurent Pinchart
2011-06-01 13:10 ` Tony Lindgren
2011-06-01 13:17 ` Tony Lindgren
2011-06-01 13:30 ` [PATCH v3 1/2] omap3: iovmm: Work around sg_alloc_table size limitation in IOMMU Laurent Pinchart
2011-06-01 13:30 ` Laurent Pinchart
2011-06-01 13:43 ` Russell King - ARM Linux
2011-06-01 13:43 ` Russell King - ARM Linux
2011-06-01 13:50 ` Laurent Pinchart
2011-06-01 13:50 ` Laurent Pinchart
2011-06-01 14:03 ` Russell King - ARM Linux
2011-06-01 14:03 ` Russell King - ARM Linux
2011-06-03 0:12 ` Laurent Pinchart
2011-06-03 0:12 ` Laurent Pinchart
2011-06-03 6:32 ` Russell King - ARM Linux
2011-06-03 6:32 ` Russell King - ARM Linux
2011-06-06 16:23 ` Laurent Pinchart
2011-06-06 16:23 ` Laurent Pinchart
2011-06-06 16:44 ` Russell King - ARM Linux
2011-06-06 16:44 ` Russell King - ARM Linux
2011-06-06 16:54 ` Laurent Pinchart
2011-06-06 16:54 ` Laurent Pinchart
2011-06-06 18:00 ` Russell King - ARM Linux [this message]
2011-06-06 18:00 ` Russell King - ARM Linux
2011-06-08 10:33 ` Laurent Pinchart
2011-06-08 10:33 ` Laurent Pinchart
2011-06-03 9:39 ` Felipe Contreras
2011-06-03 9:39 ` Felipe Contreras
2011-06-01 13:30 ` [PATCH v3 2/2] omap3: iovmm: Support non page-aligned buffers in iommu_vmap Laurent Pinchart
2011-06-01 13:30 ` Laurent Pinchart
2011-05-30 12:47 ` [PATCH " Laurent Pinchart
2011-05-30 13:16 ` [PATCH 0/2] OMAP3 IOMMU fixes Hiroshi DOYU
2011-06-08 10:48 ` Laurent Pinchart
2011-06-13 13:40 ` Tony Lindgren
2011-06-13 16:41 ` Laurent Pinchart
2011-06-13 19:34 ` Ohad Ben-Cohen
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