On Thu, Apr 26, 2012 at 11:16:00AM -0700, Havard Skinnemoen wrote: > Everytime a HID device is opened, a new hiddev_list is allocated with > kzalloc. This requires 64KB of physically contiguous memory, which could > easily push a heavily loaded system over the edge. Really? 64Kb is a "trigger"? What type of systems are we talking about here that this happens on? And who is opening lots of HID devices? This should only happen once at startup, and usually not again, unless a new device is added to the system, right? > Allocating the same amount of memory with vmalloc shouldn't be nearly as > demanding, so let's do that instead. The memory isn't used for DMA and > doesn't look particularly performance sensitive, so this should be safe. Have you found that this patch solves the issue you are having? I'm sure that some other 64Kb allocation will then cause a problem, right? thanks, greg k-h -- 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
