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* Bounce Buffer Patch
@ 2002-05-17  5:50 Sanket Rathi
  2002-05-17  6:09 ` Jens Axboe
  0 siblings, 1 reply; 3+ messages in thread
From: Sanket Rathi @ 2002-05-17  5:50 UTC (permalink / raw)
  To: linux-kernel

I have read about bounce buffer and understand.
but from where i can get the code of that patch and how it internally
works.

can anybody help

Thanks in advance

--- Sanket Rathi

--------------------------


^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: Bounce Buffer Patch
  2002-05-17  5:50 Bounce Buffer Patch Sanket Rathi
@ 2002-05-17  6:09 ` Jens Axboe
  2002-05-17 15:16   ` Sanket Rathi
  0 siblings, 1 reply; 3+ messages in thread
From: Jens Axboe @ 2002-05-17  6:09 UTC (permalink / raw)
  To: Sanket Rathi; +Cc: linux-kernel

On Fri, May 17 2002, Sanket Rathi wrote:
> I have read about bounce buffer and understand.
> but from where i can get the code of that patch and how it internally
> works.

You mean the patch to avoid bounce buffering? Andrea has an uptodate
version here:

http://www.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.4/2.4.19pre8aa3/00_block-highmem-all-18b-11.gz

In short, it does its magic by not relying on the virtual mapping of a
given page. If you want more info than that, you'll have to ask more
qualified questions.

-- 
Jens Axboe


^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: Bounce Buffer Patch
  2002-05-17  6:09 ` Jens Axboe
@ 2002-05-17 15:16   ` Sanket Rathi
  0 siblings, 0 replies; 3+ messages in thread
From: Sanket Rathi @ 2002-05-17 15:16 UTC (permalink / raw)
  To: Jens Axboe; +Cc: linux-kernel, linux-mm

Thanks
i want to know how kernel does the job for bounce buffer.
i mean how kernel perform tasks of copying data and allocating bounce
buffer.
because if i give an address to a device for DMA then device will start
DMA from there so when kernel comes in picture i am confussed let me know
about this.

Thanks in advance


--- Sanket Rathi

--------------------------

On Fri, 17 May 2002, Jens Axboe wrote:

> On Fri, May 17 2002, Sanket Rathi wrote:
> > I have read about bounce buffer and understand.
> > but from where i can get the code of that patch and how it internally
> > works.
> 
> You mean the patch to avoid bounce buffering? Andrea has an uptodate
> version here:
> 
> http://www.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.4/2.4.19pre8aa3/00_block-highmem-all-18b-11.gz
> 
> In short, it does its magic by not relying on the virtual mapping of a
> given page. If you want more info than that, you'll have to ask more
> qualified questions.
> 
> -- 
> Jens Axboe
> 


^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2002-05-17 15:18 UTC | newest]

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2002-05-17  5:50 Bounce Buffer Patch Sanket Rathi
2002-05-17  6:09 ` Jens Axboe
2002-05-17 15:16   ` Sanket Rathi

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