It would be interesting to turn on CONFIG_USB_STORAGE_DEBUG and capture the debugging output.
Matt On Tue, Jul 31, 2007 at 08:37:31PM +0100, Kostas Peletidis wrote: > Matthew Dharm wrote: > >Did you change any USB-related compile options between the two builds? > > > >Do you have usb device suspend enabled? > > > >Can you tell (via top) where the 100% CPU usage is coming from (i.e. df, > >usb-storage thread, syswait, etc)? > > > >Matt > > > > > Hi Matt, > > The most relevant USB configuration option I changed seems to be > "CONFIG_USB_DEVICE_CLASS=y". I have also added module support for > CONFIG_USB_USBNET but I don't think this is related. Please find > attached the kernel configuration. > > USB suspend is disabled (# CONFIG_USB_SUSPEND is not set) and when I run > top and press Shift+P I see that df is at the top of the list, followed > by Xorg and usb-storage. The load average reaches 1.17. Interestingly > enough, when df is at the top of the list I see roughly "90%wa" which I > presume means the CPU spends most of the time waiting. Here are the > times derived from "time df": > > real 1m4.612s > user 0m0.006s > sys 0m2.867s > > It is worth mentioning that the problem happens only the first time I > run df. Subsequent runs of df work normally. If I unmount the disk and > remount it I see the same problem. > > Regards, > Kostas > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > linux-usb-devel@lists.sourceforge.net > To unsubscribe, use the last form field at: > https://lists.sourceforge.net/lists/listinfo/linux-usb-devel -- Matthew Dharm Home: [EMAIL PROTECTED] Maintainer, Linux USB Mass Storage Driver NYET! The evil stops here! -- Pitr User Friendly, 6/22/1998
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