> This sounds like something that will always be wrong -- or in other
> words, always be right for only the latest CPUs. Can this be made
> dynamic, based on some timing factor?
In fact I think this has been tweaked twice in the vanilla tree
already.
This is actually just the same tweak you re
From: Jeff Garzik <[EMAIL PROTECTED]>
Date: Fri, 02 Mar 2007 22:14:39 -0500
> Chris Leech wrote:
> > Every 20 descriptors turns out to be to few append commands with
> > newer/faster CPUs. Pushing every 4 still cuts down on MMIO writes to an
> > acceptable level without letting the DMA engine run
Chris Leech wrote:
Every 20 descriptors turns out to be to few append commands with
newer/faster CPUs. Pushing every 4 still cuts down on MMIO writes to an
acceptable level without letting the DMA engine run out of work.
Signed-off-by: Chris Leech <[EMAIL PROTECTED]>
---
drivers/dma/ioatdma.c
Every 20 descriptors turns out to be to few append commands with
newer/faster CPUs. Pushing every 4 still cuts down on MMIO writes to an
acceptable level without letting the DMA engine run out of work.
Signed-off-by: Chris Leech <[EMAIL PROTECTED]>
---
drivers/dma/ioatdma.c |4 ++--
1 files
