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Re: kern/40462: bnx0: Double mbuf allocation failure!
The following reply was made to PR kern/40462; it has been noted by GNATS.
From: Jarle Greipsland <jarle%uninett.no@localhost>
To: gnats-bugs%NetBSD.org@localhost, mhitch%lightning.msu.montana.edu@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
Subject: Re: kern/40462: bnx0: Double mbuf allocation failure!
Date: Fri, 23 Jan 2009 20:48:17 +0100 (CET)
"Michael L. Hitch" <mhitch%lightning.msu.montana.edu@localhost> writes:
> I think this occurs because each bnx device attempts to allocate a large
> number of receive buffers from the mbuf cluster pool. The default size
> is too small for two bnx devices, and the bnx driver appears to be the
> only one I've seen that panics when it can't allocate the receive buffers.
> You can override this with the NMBCLUSTERS kernel config option (which
> required rebuilding the kernel). Also, enabling the GATEWAY option will
> usually double the default NMBCLUSTERS (but also requires a kernel
Thanks for the advice. I'll find a suitable service window and
try out a kernel with an increased setting for the NMBCLUSTERS
option and see what happens.
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