Messages in this thread |  | | | Date | Fri, 18 Aug 2006 07:11:57 +0000 | | From | Pavel Machek <> | | Subject | Re: [PATCH 1/7] [I/OAT] Push pending transactions to hardware more frequently |
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Hi!
> 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 <christopher.leech@intel.com> > --- > > drivers/dma/ioatdma.c | 4 ++-- > 1 files changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/dma/ioatdma.c b/drivers/dma/ioatdma.c > index dbd4d6c..be4fdd7 100644 > --- a/drivers/dma/ioatdma.c > +++ b/drivers/dma/ioatdma.c > @@ -310,7 +310,7 @@ static dma_cookie_t do_ioat_dma_memcpy(s > list_splice_init(&new_chain, ioat_chan->used_desc.prev); > > ioat_chan->pending += desc_count; > - if (ioat_chan->pending >= 20) { > + if (ioat_chan->pending >= 4) { > append = 1; > ioat_chan->pending = 0; > } > @@ -818,7 +818,7 @@ static void __devexit ioat_remove(struct > } > > /* MODULE API */ > -MODULE_VERSION("1.7"); > +MODULE_VERSION("1.9"); > MODULE_LICENSE("GPL"); > MODULE_AUTHOR("Intel Corporation");
Huh, two version bumps for... ONE ONE-LINER :-).
Could we get rid of embedded version? It helps no one.
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