Date: Sun, 27 Jul 2003 21:14:45 +0200 From: Gary Jennejohn <garyj@jennejohn.org> To: Lukas Ertl <l.ertl@univie.ac.at> Cc: Mark Blackman <mark@exonetric.com> Subject: Re: device driver memory leak in 5.1-20030726? Message-ID: <200307271914.h6RJEjjr001156@peedub.jennejohn.org> In-Reply-To: Message from Lukas Ertl <l.ertl@univie.ac.at> of "Sun, 27 Jul 2003 16:43:32 %2B0200." <20030727163914.S698@korben.in.tern>
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Lukas Ertl writes: > 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 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. > I did some playing around today with various kernels. A kernel from July 12 at 12:01 works just fine. A kernel from July 15 at 23:30 hangs (with the IRQ9 thread and g_down each using 50% of the CPU). Killing the mount with ^C leaves the (in my case) mount_msdos hung in the background and it's un-killable. It's probably stuck waiting for USB. A kernel from July 16 at 12:01 exhibits similar symptoms to the kernel from July 15. July 15 is about the time that a massive update of the USB code from NetBSD was made. I didn't try kernels from July 13 or July 14. I've observed other problems with -current: 1) mount_msdos results in a kernel panic (NULL pointer deref) 2) mounting linuxprocfs also results in a panic At the moment I'm running a world from July 15 and a kernel from July 12. --- Gary Jennejohn / garyj[at]jennejohn.org gj[at]freebsd.org gj[at]denx.de
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