Re: device driver memory leak in 5.1-20030726?

From: Gary Jennejohn (garyj_at_jennejohn.org)
Date: 07/26/03

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    To: Mark Blackman <mark@exonetric.com>
Date: Sat, 26 Jul 2003 23:02:49 +0200

    Mark Blackman writes:
    > I'm seeing the same 'kmem_malloc(4096): kmem_map too small: XXXXX total
    > allocated'
    > messages that a few other have reported.
    [snip]
    > From these symptoms, I'm speculating that one or more device drivers
    > are producing kernel memory leaks and either triggering the
    > 'kmem_map too small' messages or pushing all of the userland processes
    > out of the way. Is this a reasonable interpretation?
    >
    > Does anyone else see symptoms that might lead to this conclusion?
    >

    I'm seeing exactly the same thing when I try to access my Archos
    Jukebox (a USB 2.0 device). This didn't happen with a kernel made
    before July 20, although I can't say when exactly the leak (if there
    is one) was introduced, since I only make a new kernel every few
    weeks.

    Eventually usb_allocmem fails and shortly thereafter I get the ``kmem_map
    too small'' panic.

    Unfortunately, panicing in ddb results in a hang - no crashdump. 

    ---
Gary Jennejohn / garyj[at]jennejohn.org gj[at]freebsd.org gj[at]denx.de
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