From owner-freebsd-hackers  Wed Nov 11 08:11:15 1998
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id IAA01946
          for freebsd-hackers-outgoing; Wed, 11 Nov 1998 08:11:15 -0800 (PST)
          (envelope-from owner-freebsd-hackers@FreeBSD.ORG)
Received: from root.com (root.com [198.145.90.17])
          by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id IAA01941
          for <freebsd-hackers@FreeBSD.ORG>; Wed, 11 Nov 1998 08:11:14 -0800 (PST)
          (envelope-from root@root.com)
Received: from root.com (localhost [127.0.0.1])
	by root.com (8.8.8/8.8.5) with ESMTP id IAA18098;
	Wed, 11 Nov 1998 08:12:11 -0800 (PST)
Message-Id: <199811111612.IAA18098@root.com>
To: Reinier Bezuidenhout <Reinier.Bezuidenhout@KryptoKom.DE>
cc: freebsd-hackers@FreeBSD.ORG
Subject: Re: Malloc in the kernel and double panic 
In-reply-to: Your message of "Wed, 11 Nov 1998 15:33:42 +0100."
             <199811111433.PAA25157@borg.kryptokom.de> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Wed, 11 Nov 1998 08:12:11 -0800
Sender: owner-freebsd-hackers@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

>After being unable to allocate a dynamic continious chunk of memory
>in the kernel, I decided I would not try to do it dynamically
>and let it grow as I need more entries.  I decided to malloc one
>big array whose elements are pointers to structures ... so I have the
>following type:
>
>T_KEY *T_P_KEY;    With T_KEY the structure.
>
>T_P_KEY *large_one;
>
>large_one = (T_P_KEY *)malloc(sizeof(T_P_KEY) * 10000, M_DEVBUF, M_WAITOK);

   Just a guess: although you think that sizeof(T_P_KEY) is 4 (a pointer),
it's actually much larger. There isn't any problem with allocating 40KB
with malloc; many things do it in the kernel.

-DG

David Greenman
Co-founder/Principal Architect, The FreeBSD Project

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message