On Mon, 2008-02-11 at 12:18 -0700, Matthew Wilcox wrote: > On Mon, Feb 11, 2008 at 10:27:46AM -0800, Chandra Seetharaman wrote: > > On Sat, 2008-02-09 at 05:45 -0700, Matthew Wilcox wrote: > > > On Mon, Feb 04, 2008 at 01:19:30PM -0800, Chandra Seetharaman wrote: > > > > The device does send these error messages currently, but it takes some > > > > time to get the check condition back, which adds up the time to boot > > > > especially when the # of LUNS is huge. > > > > > > > > For example, in my test configuration, I had 40 luns, and the time > > > > difference (with this patch and without it) to boot is 171 seconds and > > > > 1426 seconds. > > > > > > Was that with sync or async SCSI bus scanning? > > > > I didn't change anything, IOW, i did default scanning, which I would > > guess sync ?! > > That would depend on your CONFIG_SCSI_SCAN_ASYNC setting. > > Try booting with 'scsi_mod.scan=async' and without this patch, and see > how long it takes. Hi Matthew, scanning in async mode did not help in reducing the boot time. I even changed the configuration, such that 20 active luns and 20 passive luns are in each path, it still didn't change the time it took to reboot. regards, chandra > -- ---------------------------------------------------------------------- Chandra Seetharaman | Be careful what you choose.... - sekharan@xxxxxxxxxx | .......you may get it. ---------------------------------------------------------------------- - 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