Re: Severe trashing in 2.4.4

From: Manfred Spraul (
Date: Sun Apr 29 2001 - 17:06:52 EST

> On Sun, Apr 29, 2001 at 01:58:52PM -0400, Alexander Viro wrote:
> > Hmm... I'd say that you also have a leak in kmalloc()'ed stuff -
> > something in 1K--2K range. From your logs it looks like the
> > thing never shrinks and grows prettu fast...

You could enable STATS in mm/slab.c, then the number of alloc and free
calls would be printed in /proc/slabinfo.

> Yeah, those as well. I kinda guessed they were related...

Could you check /proc/sys/net/core/hot_list_length and skb_head_pool
(not available in /proc, use gdb --core /proc/kcore)? I doubt that this
causes your problems, but the skb_head code uses a special per-cpu
linked list for even faster allocations.

Which network card do you use? Perhaps a bug in the zero-copy code of
the driver?


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