Subject: Re: no buffer space available
To: NetBSD User's Discussion List <netbsd-users@NetBSD.ORG>
From: Greg A. Woods <email@example.com>
Date: 06/24/2001 17:51:34
[ On Sunday, June 24, 2001 at 14:46:21 (-0500), firstname.lastname@example.org wrote: ]
> Subject: Re: no buffer space available
> I havent been really paying attention to this thread, but
> maybe increasing the value of kern.mbuf.nmbclusters with sysctl -w might
> fix the problem. Or you might want to recompile your kernel with a higher
> value for NMBCLUSTERS.
The last time my router "froze" up with this very similar problem
'netstat -m' only showed about "12% in use), and it indicated that
there'd never been any requests for memory denied or delayed.
There's considerably less in use now, but there hasn't been a reboot in
the mean time:
$ netstat -m
2 mbufs in use:
1 mbufs allocated to data
1 mbufs allocated to packet headers
0/14 mapped pages in use
100 Kbytes allocated to network (0% in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
Is the netstat memory accounting broken?
Neither my cable modem nor DSL links were conjested at the time either
(though IIRC I was listening to an _incoming_ 128kbit MP3 stream shortly
The interface that was stuck was actually the LAN too, not either of the
ethernets to the DSL/cable modems. It's half-duplex, but on a switched
segment and the collision rate is less than one percent.
Greg A. Woods
+1 416 218-0098 VE3TCP <email@example.com> <firstname.lastname@example.org>
Planix, Inc. <email@example.com>; Secrets of the Weird <firstname.lastname@example.org>