On Wed, 06 Dec 2006 23:24:59 -0800 (PST)
David Miller <[EMAIL PROTECTED]> wrote:
> From: "Amit S. Kale" <[EMAIL PROTECTED]>
> Date: Thu, 7 Dec 2006 11:55:22 +0530
>
> > We can let a driver handle dma mapping errors using these->
> >
> > 1.Reduce the size of a receive ring. This will free some po
On Thu, Dec 07, 2006 at 11:48:14AM +0530, Amit S. Kale wrote:
> On the x86_64 boxes that don't feature iommu functionality (because the
> motherboard disables it or because Linux can't handle it) Linux bounce buffer
> framework automatically comes into picture. Could we have the same framework
From: "Amit S. Kale" <[EMAIL PROTECTED]>
Date: Thu, 7 Dec 2006 11:55:22 +0530
> We can let a driver handle dma mapping errors using these->
>
> 1.Reduce the size of a receive ring. This will free some possibly remapped
> memory, reducing pressure on iommu. We also need to printk a message so tha
On Thursday 07 December 2006 12:16, Stephen Hemminger wrote:
> Amit S. Kale wrote:
> > We can let a driver handle dma mapping errors using these->
> >
> > 1.Reduce the size of a receive ring. This will free some possibly
> > remapped memory, reducing pressure on iommu. We also need to printk a
> >
Amit S. Kale wrote:
We can let a driver handle dma mapping errors using these->
1.Reduce the size of a receive ring. This will free some possibly remapped
memory, reducing pressure on iommu. We also need to printk a message so that
a user knows the reason why receive ring was shrunk. Growing i
We can let a driver handle dma mapping errors using these->
1.Reduce the size of a receive ring. This will free some possibly remapped
memory, reducing pressure on iommu. We also need to printk a message so that
a user knows the reason why receive ring was shrunk. Growing it when iommu
pressure
On Thursday 07 December 2006 01:03, Muli Ben-Yehuda wrote:
> On Wed, Dec 06, 2006 at 10:16:44AM -0800, Stephen Hemminger wrote:
> > I think it is really only an issue for drivers that turn on HIGH_DMA
> > and have limited mask values. The majority of drivers either only
> > handle 32 bit (!HIGH_DMA
From: Rick Jones <[EMAIL PROTECTED]>
Date: Wed, 06 Dec 2006 18:18:52 -0800
> While tossing a TCP|UDP|SCTP|etc packet could be plusungood, especially
> if the IOMMU fills frequently (for some suitable definiton of
> frequently), is it really worth the effort to save say an ACK?
ACKs are less imp
David Miller wrote:
From: Stephen Hemminger <[EMAIL PROTECTED]>
Date: Wed, 6 Dec 2006 16:58:35 -0800
The more robust way would be to stop the queue (like flow control)
and return busy. You would need a timer though to handle the case
where some disk i/o stole all the mappings and then network
From: Stephen Hemminger <[EMAIL PROTECTED]>
Date: Wed, 6 Dec 2006 16:58:35 -0800
> The more robust way would be to stop the queue (like flow control)
> and return busy. You would need a timer though to handle the case
> where some disk i/o stole all the mappings and then network device flow
> bloc
On Wed, 06 Dec 2006 16:54:18 -0800 (PST)
David Miller <[EMAIL PROTECTED]> wrote:
> From: Stephen Hemminger <[EMAIL PROTECTED]>
> Date: Wed, 6 Dec 2006 10:16:44 -0800
>
> > I think it is really only an issue for drivers that turn on HIGH_DMA
> > and have limited mask values. The majority of driver
From: Stephen Hemminger <[EMAIL PROTECTED]>
Date: Wed, 6 Dec 2006 10:16:44 -0800
> I think it is really only an issue for drivers that turn on HIGH_DMA
> and have limited mask values. The majority of drivers either only handle
> 32 bit (!HIGH_DMA) or do full 64 bit mapping. I don't know the detail
On Wed, Dec 06, 2006 at 10:16:44AM -0800, Stephen Hemminger wrote:
> I think it is really only an issue for drivers that turn on HIGH_DMA
> and have limited mask values. The majority of drivers either only
> handle 32 bit (!HIGH_DMA) or do full 64 bit mapping. I don't know
> the details of how we
On Tue, 5 Dec 2006 09:00:45 +0200
Muli Ben-Yehuda <[EMAIL PROTECTED]> wrote:
> On Mon, Dec 04, 2006 at 10:39:49AM -0800, Stephen Hemminger wrote:
>
> > I notice that no current network driver handles dma mapping errors.
> > Might that be part of the problem. On i386, this never happens, and
> >
On Mon, Dec 04, 2006 at 10:39:49AM -0800, Stephen Hemminger wrote:
> I notice that no current network driver handles dma mapping errors.
> Might that be part of the problem. On i386, this never happens, and
> it would be rare on most others.
IOMMUs are already available on x86-64 and are going t
On Sat, 02 Dec 2006 00:32:55 -0500
Jeff Garzik <[EMAIL PROTECTED]> wrote:
> Amit S. Kale wrote:
> > NetXen: 1G/10G Ethernet driver updates
> > - These fixes take care of driver on machines with >4G memory
> > - Driver cleanup
> >
> > Signed-off-by: Amit S. Kale <[EMAIL PROTECTED]>
> >
>
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