Thank you Alan:) I'll keep you posted:)
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Alan Stern Sent: Tuesday, September 21, 2004 10:47 AM To: Kyle Harris Cc: [EMAIL PROTECTED] Subject: Re: [linux-usb-devel] usb-storage: page allocation failure On Tue, 21 Sep 2004, Kyle Harris wrote: > While debugging my new hcd 2.6.8.1 HCD on PXA platform I get the > following > error: > > usb-storage: page allocation failure. order:0, mode:0x20 > > I've checked for memory leaks in the hcd but pretty sure there are > none (count mallocs and frees). I can copy small files to the usbdrive > and see free memory go down. But as soon as I umount the device, > available memory comes back. Is it normal to see this error? This message indicates you have run out of free memory, right? No, it's not usual, at least not on desktop machines with lots of memory and swap space. It might end up being a lot more common on PXA platforms. usb-storage (or rather, the scatter-gather library that usb-storage calls) needs to allocate memory to do its work. It has to use SLAB_NOIO because there might be a swap partition on the USB storage device -- we wouldn't want a transfer to block waiting for memory to be swapped out to the device that's blocked! So it's vulnerable to low-memory conditions. The memory usage that you see while the device is mounted doesn't come from usb-storage; it must come from the filesystem code. Alan Stern ------------------------------------------------------- This SF.Net email is sponsored by: YOU BE THE JUDGE. Be one of 170 Project Admins to receive an Apple iPod Mini FREE for your judgement on who ports your project to Linux PPC the best. Sponsored by IBM. Deadline: Sept. 24. Go here: http://sf.net/ppc_contest.php _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel ------------------------------------------------------- This SF.Net email is sponsored by: YOU BE THE JUDGE. Be one of 170 Project Admins to receive an Apple iPod Mini FREE for your judgement on who ports your project to Linux PPC the best. Sponsored by IBM. Deadline: Sept. 24. Go here: http://sf.net/ppc_contest.php _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
