John-Mark Gurney wrote: > Lukas Ertl wrote this message on Sun, Jul 27, 2003 at 16:43 +0200: > >>On Sun, 27 Jul 2003, Mark Blackman wrote: >> >> >>>Perhaps it's a USB bug. There seems to be some correspondence between >>>the use of the USB Speedtouch ADSL modem and the out-of-control >>>devbuf allocations. >> >>I'm too seeing these annoying kmem_malloc panics on recent -current >>kernels. The laptop I'm using is way off of being overloaded at all, the >>only thing I do is going online using a Bluetooth USB dongle. As soon as I >>generate some network traffic, devbuf allocations go up, until at some >>point the machine panics randomly in kmem_malloc. > > > I must note that the USB changes only allocates memory in the M_USB > area which is described by: > usb.c:MALLOC_DEFINE(M_USB, "USB", "USB"); > > So, that means it wouldn't be in the devbuf area. (This is the one of > the points of malloc areas is to help track down stray allocations and > memory leaks). > > >>I have different core dumps and backtraces available, but they don't seem >>to be of much use in this case. I really suspect the USB stuff to be >>leaking. > > > It may be leaking, but it won't be leaking devbuf memory. The only > thing that is in usb (in dev/usb) that uses M_DEVBUF is ukbd. > bus_dma_tag_create() allocates out of M_DEVBUF. Could it be that tags are being created and never destroyed? ScottReceived on Sun Jul 27 2003 - 20:33:51 UTC
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