On Tue, Jan 15, 2013 at 11:56:42AM -0500, Jason Cooper wrote: > Greg, > > I've added you to the this thread hoping for a little insight into USB > drivers and their use of coherent and GFP_ATOMIC. Am I barking up the > wrong tree by looking a the drivers?
I don't understand, which drivers are you referring to? USB host controller drivers, or the "normal" drivers? Most USB drivers use GFP_ATOMIC if they are creating memory during their URB callback path, as that is interrupt context. But it shouldn't be all that bad, and the USB core hasn't changed in a while, so something else must be causing this. greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
