On Sun, 4 Jan 2009 11:05:15 -0700 Matthew Wilcox <matthew@xxxxxx> wrote: > On Sun, Jan 04, 2009 at 09:29:40AM -0800, Arjan van de Ven wrote: > > >From 2087b546abddced50fa73ea9a71b5a040ae1026e Mon Sep 17 00:00:00 > > >2001 > > From: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx> > > Date: Sun, 4 Jan 2009 05:32:28 -0800 > > Subject: [PATCH] fastboot: make scsi probes asynchronous > > > > This patch makes part of the scsi probe (which is mostly device > > spin up and the partition scan) asynchronous. Only the part that > > runs after getting the device number allocated is asynchronous, > > ensuring that device numbering remains stable. > > Is this really a big win? Were you using the async scsi scan code > already? just checked; my box has CONFIG_SCSI_SCAN_ASYNC=y set for both cases it seems to be about 0.1 seconds win still though... sounds little, but a kernel boot should be less than a second, so that is still 10%. And it's obviously also disk dependent.. (I used libata connected disks obviously) -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
