On Wed, Oct 31, 2012 at 12:30 AM, Oliver Neukum <oneukum@xxxxxxx> wrote: >> If the USB mass-storage device is being reseted, the flag should be set >> already generally. If the flag is still unset, that means the disk/network >> device isn't added into system(or removed just now), so memory allocation >> with block I/O should be allowed during the reset. Looks it isn't one problem, >> isn't it? > > I am afraid it is, because a disk may just have been probed as the deviceis being reset. Yes, it is probable, and sounds like similar with 'root_wait' problem, see prepare_namespace(): init/do_mounts.c, so looks no good solution for the problem, and maybe we have to set the flag always before resetting usb device. Thanks, -- Ming Lei -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>