Re: [RFC][PATCH] libata ATAPI alignment

[Jeff Garzik]

Jens Axboe wrote:
> On Fri, Jul 29 2005, Jeff Garzik wrote:
> > diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
> > --- a/drivers/scsi/ahci.c
> > +++ b/drivers/scsi/ahci.c
> > @@ -44,7 +44,7 @@
> >
> > enum {
> > 	AHCI_PCI_BAR		= 5,
> > -	AHCI_MAX_SG		= 168, /* hardware max is 64K */
> > +	AHCI_MAX_SG		= 300, /* hardware max is 64K */
> > 	AHCI_DMA_BOUNDARY	= 0xffffffff,
> > 	AHCI_USE_CLUSTERING	= 0,
> > 	AHCI_CMD_SLOT_SZ	= 32 * 32,
>
>
> Reasoning? I agree, just wondering... How big is the allocated area now?

168 kept the entire allocated DMA area to 4K.

300 increases that to <I don't care>K.  ;-)

	Jeff


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