Maybe we need a default vmd class? What do you guys think?
On 25/02/22 15:34 +0100, Paul de Weerd wrote:
> Hi all,
>
> In commit Eg1WuG7hzCoCPdcz, robert@ changed the ulimit for the daemon
> class in /etc/login.conf for amd64 from 'infinity' to 4096M (see [0]
> and [1]).
>
> This change broke my vmd setup, and I had to dig around to understand
> what happened. Sharing here in hopes of preventing others from
> wasting their time like I did.
>
>
> I have a VM that is configured with 4GB of RAM:
>
> [weerd@pom] $ grep -B2 4G /etc/vm.conf
> vm "builder" {
> owner weerd
> memory 4G
>
> After upgrading to a newer snapshot (and sysmerge'ing login.conf), vmd
> crashes when this VM gets started:
>
> pom vmd[98555]: builder: could not allocate guest memory - exiting: Cannot
> allocate memory
> pom vmd[71874]: vmm: read vcp id
> pom vmd[10670]: priv exiting, pid 10670
> pom vmd[73889]: control exiting, pid 73889
>
> (resource limits doing exactly what they're supposed to do here!)
>
> It took me longer than I care to admit to realize that this would be
> caused by the newly reduced datasize limit imposed by Robert's change.
> I fixed this by adding a dedicated login.conf stanza for vmd:
>
> [weerd@pom] $ tail -n7 /etc/login.conf
> ######################################################################
> # Local changes
> #
> # vmd runs VMs with 4GB, so it needs an increased datasize limit:
> vmd:\
> :datasize=5120M:\
> :tc=daemon:
>
> Alternatively, I could've stuck that bit in /etc/login.conf.d/vmd
> which would've had the same effect. But with that change everything
> is working just fine again. When you run into a similar issue, make
> sure not to just revert back to "infinite" - find a suitable limit for
> whatever piece of software you have and adjust accordingly.
>
> Cheers,
>
> Paul
>
> [0]: https://marc.info/?l=openbsd-cvs&m=164542553811748&w=2
> [1]:
> http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/etc/etc.amd64/login.conf.diff?r1=1.21&r2=1.22
>
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>
--
Regards,
Robert Nagy
