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From: Gavin Atkinson <gavin.atkinson@ury.york.ac.uk>
To: Dmitry Pryanishnikov <dmitry@atlantis.dp.ua>
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Date: Thu, 21 Sep 2006 11:14:33 +0100
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Cc: freebsd-stable@freebsd.org
Subject: Re: Minidumps in -STABLE and "smaller than physical memory"
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On Thu, 2006-09-21 at 11:44 +0300, Dmitry Pryanishnikov wrote:
> Hello!
> 
>    I've noticed (with the 2-day old RELENG_6) that I still can't configure my
> 256Mb swap partition as a dump device for i386 machine with 1Gb RAM despite
> having minidumps enabled:
> 
> root@test2# sysctl debug.minidump
> debug.minidump: 1
> root@test2# dumpon -v /dev/ad0s3b
> /dev/ad0s3b is smaller than physical memory
> 
> Am I correctly understand that minidumps should lift the restriction
> 
>  	sizeof(dumpdev) >= sizeof(RAM)

Yes.

http://www.freebsd.org/cgi/cvsweb.cgi/src/sbin/dumpon/dumpon.c.diff?r1=1.22&r2=1.23
needs to be MFC'd.

Gavin