device driver memory leak in 5.1-20030726?

Mark Blackman mark at
Sun Jul 27 07:37:02 PDT 2003

On Saturday, July 26, 2003, at 10:02 PM, Gary Jennejohn wrote:

> 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] gj[at] gj[at]

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.

Mark Blackman
Exonetric Consulting

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