Date: Mon, 9 May 2022 13:09:25 -0400 From: Michael Wayne <freebsd07@wayne47.com> To: freebsd-hackers@freebsd.org Subject: Re: Can not build kernel on 1GB VM Message-ID: <20220509170925.GQ72471@post.wayne47.com> In-Reply-To: <5db061cf-1e23-7cfb-fea-4573f379ae5d@puchar.net> References: <20220415174953.GE13678@post.wayne47.com> <5db061cf-1e23-7cfb-fea-4573f379ae5d@puchar.net>
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On Tue, Apr 19, 2022 at 08:52:00AM +0200, Wojciech Puchar wrote: > try > > sysctl -w vm.overcommit=1 No improvement. > On Fri, 15 Apr 2022, Michael Wayne wrote: > > > I have a VM with 1GB RAM running FreeBSD 12.1-RELEASE-p3 > > > > I'm trying to upgrade the machine to 12.3 and having swap failures. > > > > This machine runs bird to advertise BGP, ssh and not much else so > > the small amount of RAM is (usually) fine. > > > > For a long time, there was a 1 GB swap file which handled the > > occasional time when excess memory got used. > > > > Machine needs a custom kernel for BGP, the conf file consists of: > > include GENERIC > > ident ROUTING > > options TCP_SIGNATURE > > > > > > Today, while building the 12.3 kernel with: > > cd /usr/src > > sudo make toolchain > > sudo make buildkernel KERNCONF=ROUTING > > the machine ran out of swap. with a bunch of messages like: > > Apr 15 12:11:26 g1 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 240593, size: 4096 > > Apr 15 12:11:35 g1 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 236224, size: 16384 > > Apr 15 12:11:37 g1 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 245, size: 12288 > > Apr 15 12:11:46 g1 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 240593, size: 4096 > > Apr 15 12:11:55 g1 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 236224, size: 16384 > > Apr 15 12:11:57 g1 kernel: swap_pager: indefinite wait buffer: bufobj: 0, blkno: 245, size: 12288 > > > > Thinking it was a sawp space issue, I increased the swap to 4 GB and > > tried again with the same results. Boot gave the kern.maxswzone message, > > I ignored it as I had planned to change as soon as I completed the build. > > > > So I pulled up top in a console window and watched swap during the > > build. About 400 MB of RAM was free and about 3 MB of swap was > > used when the machine started linking the kernel: > > ctfmerge -L VERSION -g -o kernel.full ... > > While this command was running, I saw swap usage go to ~5MB (so > > just over 1%), then started seeing processes being killed due to > > out of swap space. > > > > So, how to proceed?
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