> -----Original Message----- > From: linux-hyperv-owner@xxxxxxxxxxxxxxx <linux-hyperv- > owner@xxxxxxxxxxxxxxx> On Behalf Of Michael Kelley > Sent: Monday, April 1, 2019 5:42 PM > To: KY Srinivasan <kys@xxxxxxxxxxxxx>; martin.petersen@xxxxxxxxxx; Long Li > <longli@xxxxxxxxxxxxx>; James.Bottomley@xxxxxxxxxxxxxxxxxxxxx; > emilne@xxxxxxxxxx; linux-hyperv@xxxxxxxxxxxxxxx; linux- > kernel@xxxxxxxxxxxxxxx; linux-scsi@xxxxxxxxxxxxxxx > Cc: Michael Kelley <mikelley@xxxxxxxxxxxxx> > Subject: [PATCH 1/1] scsi: storvsc: Reduce default ring buffer size to 128 Kbytes > > Reduce the default VMbus channel ring buffer size for storvsc SCSI devices > from 1 Mbyte to 128 Kbytes. Measurements show that ring buffer sizes above > 128 Kbytes do not increase performance even at very high IOPS rates, so don't > waste the memory. Also remove the dependence on PAGE_SIZE, since the ring > buffer size should not change on architectures where PAGE_SIZE is not 4 Kbytes. > > Signed-off-by: Michael Kelley <mikelley@xxxxxxxxxxxxx> Reviewed-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx> Thank you.
