From owner-freebsd-bugs  Mon Oct 12 11:27:38 1998
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Date: Tue, 13 Oct 1998 04:27:16 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199810121827.EAA19765@godzilla.zeta.org.au>
To: freebsd-bugs@FreeBSD.ORG, toasty@home.dragondata.com
Subject: Re: bin/8275: w/top/etc randomly fail with 'Cannot allocate memory'
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> > "home.dragondata.com" <root@shell1.dragondata.com> writes:
> > > bash-2.02# w
> > >  1:10PM  up 19 days, 54 mins, 7 users, load averages: 0.08, 0.48, 0.73
> > > USER     TTY FROM              LOGIN@  IDLE WHAT
> > > w: kvm_getprocs: Cannot allocate memory: Cannot allocate memory
> >                    ^^^^^^^^^^^^^^^^^^^^^^

> With 18MB free, and 60MB sitting in a cache, I can't see that I'm out of
> just raw memory... Our of mbufs? Out of some fixed kind of memory? That's
> what I don't know - what memory am I running out of?

Probably just malloced memory.  kvm_getprocs() asks the kernel for the
size required to fit information about all processes.  It malloc()s
this size and attempts to fetch the information using another sysctl.
This fails if the size required has increased, but kvm_getprocs() is
too stupid to retry.

Bruce

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