On Wed, 2014-01-22 at 11:50 -0800, Andrew Morton wrote: > On Wed, 22 Jan 2014 11:30:19 -0800 James Bottomley > <james.bottom...@hansenpartnership.com> wrote: > > > But this, I think, is the fundamental point for debate. If we can pull > > alignment and other tricks to solve 99% of the problem is there a need > > for radical VM surgery? Is there anything coming down the pipe in the > > future that may move the devices ahead of the tricks? > > I expect it would be relatively simple to get large blocksizes working > on powerpc with 64k PAGE_SIZE. So before diving in and doing huge > amounts of work, perhaps someone can do a proof-of-concept on powerpc > (or ia64) with 64k blocksize.
Maybe 5 drives in raid5 on MD, with 4K coming from each drive. Well aligned 16K IO will work, everything else will about the same as a rmw from a single drive. -chris -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
