Date: Mon, 5 Mar 2007 16:23:50 +0300 From: Yar Tikhiy <yar@comp.chem.msu.su> To: Kris Kennaway <kris@obsecurity.org> Cc: stable@freebsd.org, Alex Kozlov <spam@rm-rf.kiev.ua>, Mikhail Teterin <mi+kde@aldan.algebra.com> Subject: Re: panic: kmem_malloc(16384): kmem_map too small: md-mounted /tmp filled up Message-ID: <20070305132350.GB57253@comp.chem.msu.su> In-Reply-To: <20070305035945.GA71660@xor.obsecurity.org> References: <20070227205351.GA72597@ravenloft.kiev.ua> <200702271603.30481@aldan> <20070304075946.GH40430@comp.chem.msu.su> <20070305035945.GA71660@xor.obsecurity.org>
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On Sun, Mar 04, 2007 at 10:59:46PM -0500, Kris Kennaway wrote: > On Sun, Mar 04, 2007 at 10:59:46AM +0300, Yar Tikhiy wrote: > > On Tue, Feb 27, 2007 at 04:03:30PM -0500, Mikhail Teterin wrote: > > > On Tuesday 27 February 2007 15:53, Alex Kozlov wrote: > > > = > Yes, I switched to swap-backed md already. But the malloc-based variety is > > > = > currently the _default_ (see /etc/defaults/rc.conf)... > > > = Bad default. > > > > > > Filing a PR. > > > > Keep in mind that changing the default can break existing setups. > > Such setups are likely to be broken anyway, but... E.g., if we > > drop the -M flag, it will break systems with tons of RAM but little > > swap using tmpmfs. > > How will it break them? swap backing only touches swap if there is > memory pressure, i.e. precisely the situation in which malloc backing > will panic. I forgot that in BSD swap wouldn't be allocated in advance to its consumers. Then removing the -M flag and making swap backing the default is a very sound choice. Thank you for correcting me. -- Yar
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