On Wed, 03 Feb 2010 12:52:34 -0500 Jeff Garzik <jgarzik@xxxxxxxxx> wrote: > On 02/03/2010 12:46 PM, Alan Cox wrote: > > And indeed there was a patch I proposed in 2008 for this bounce > > buffer latency: See the archive > > > > Date: Fri, 29 Feb 2008 13:51:06 +0000 > > From: Alan Cox<alan@xxxxxxxxxxxxxxxxxxx> > > To: linux-ide@xxxxxxxxxxxxxxx, jeff@xxxxxxxxxx > > Subject: [RFC PATCH] libata: PIO via bounce buffer > > > > although it doesn't deal with the dcache coherency issue and seems to > > need a little tweaking to apply due to other changes > > Yeah, I definitely liked the idea. I wonder if we could do the > allocation during port_start rather than at the time of bounce? I actually got better numbers using kmalloc - no idea why - perhaps we get a hot page ? -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
