On Thu, 21 Apr 2011, Oliver Neukum wrote: > Am Donnerstag, 21. April 2011, 16:03:34 schrieb Alan Stern: > > On Tue, 19 Apr 2011, Paul Stewart wrote: > > > > This version of the patch moves the urb submit directly into > > > usbnet_resume. Is it okay to submit a GFP_KERNEL urb from > > > usbnet_resume()? > > Suppose a device of two interfaces one of them storage is autosuspended. > GFP_KERNEL in the first device to be resumed triggers a pageout to the > suspended storage device. True enough, I had forgotten about that. A resume routine should always use GFP_NOIO, not GFP_KERNEL. In fact this restriction is true in general, not just for USB devices containing a mass-storage interface. The backing device for an evicted page might not be resumed until later on in the resume sequence. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
