Date: Fri, 27 Feb 2004 14:08:48 +0000 From: Colin Percival <colin.percival@wadham.ox.ac.uk> To: Chris Elsworth <chris@shagged.org> Cc: freebsd-current@freebsd.org Subject: Re: mdconfig unable to allocate memory Message-ID: <6.0.1.1.1.20040227140137.03e01818@imap.sfu.ca> In-Reply-To: <20040227135836.GA52534@shagged.org> References: <20040227101410.GA45369@shagged.org> <xzpwu68d4xy.fsf@dwp.des.no> <20040227135836.GA52534@shagged.org>
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At 13:58 27/02/2004, Chris Elsworth wrote: >Thanks for the reply. Is creating 1GB of non-pageable memory not >possible then? Even if I explicitly give the kernel far more than that >to play with? It is possible. It isn't a good idea, but it is possible. >... >So, in short, is there any rule of thumb to follow when tweaking these >settings? Yes, several: 1. Don't do it. 2. Pray. 3. Don't do it. 4. If you absolutely must do it, make sure you have a serial console connected. 5. Don't do it. > It's a bit worrying that an out of the box 5.2.1 managed to >crash at all. The fact that running out of kernel address space can cause problems is quite well documented. Why do you want to have a GB malloc-backed disk anyway? Colin Percival
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