On Wed, 15 Aug 2012, Bruno Prémont wrote: > > I see. Alan Stern has fixed a huge pile of things in this area in 3.6-rc1. > > I have expected all of those to actually be on theoretical problems not > > ever having happened in the wild, but it might be that you are actually > > chasing on of those. > > > > Could you please retest with latest Linus' tree (or at least eb055fd0560b) > > to see whether this hasn't actually been fixed already by Alan's series? > > I've started trying that out, it seems Alan's work improved things. > > For the first few attempts I have not seen SLAB corruptions, though after > a few rounds I hit accumulation of the following messages: > [ 297.174828] hid-picolcd 0003:04D8:C002.0003: output queue full > [ 297.181098] hid-picolcd 0003:04D8:C002.0003: output queue full > [ 297.187820] hid-picolcd 0003:04D8:C002.0003: output queue full > [ 297.194087] hid-picolcd 0003:04D8:C002.0003: output queue full > > with sporadically in between: > [ 292.668019] hid-picolcd 0003:04D8:C002.0003: usb_submit_urb(out) failed: -1 > > At first glance I think the queue filling up and never draining is caused > by hid_hw_stop() stalling the queue and the time between both being just too > short.
I don't really understand this explanation. Once usb_kill_urb() returns, the URB should be available for future use (and therefore all queues completely drained). -- Jiri Kosina SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
