On Mon, May 25, 2009 at 11:15:42AM +0300, Pekka Enberg wrote: > On Mon, May 25, 2009 at 10:30 AM, Jens Axboe <jens.axboe@xxxxxxxxxx> wrote: > > Fold the sense buffer into the command, thereby eliminating a slab > > allocation and free per command. > > > > Signed-off-by: Jens Axboe <jens.axboe@xxxxxxxxxx> > > Interesting. I wonder how this affects the SLAB vs. SLUB regression > people are seeing on high end machines in OLTP benchmarks. It could improve it. I think these (bios, requests, commands etc) allocations are what SLUB has trouble with in that workload, so eliminating one of them should help it. I guess it will help the other allocators as well, but maybe a smaller relative improvement? -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
