Date: Mon, 3 May 2021 12:31:44 +0200 From: Michael Gmelin <freebsd@grem.de> To: freebsd-virtualization@freebsd.org Subject: Re: FreeBSD 13 on bhyve freezes under load Message-ID: <20210503123144.134c209c@bsd64.grem.de> In-Reply-To: <587b3653-0433-ef46-a53d-d6ab0841f993@borderworlds.dk> References: <587b3653-0433-ef46-a53d-d6ab0841f993@borderworlds.dk>
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On Mon, 3 May 2021 11:14:45 +0200 Christian St=C3=A6rk <xi@borderworlds.dk> wrote: > Hello, >=20 > I recently upgraded one of my bhyve guests to FreeBSD 13.0-RELEASE. > The host is running 12.2-RELEASE-p4. >=20 > The guest in question is used for building packages with poudriere > and is always the first one to get upgraded to new releases. >=20 > The guest freezes consistently every time poudriere tries to build > the thunderbird package. Although it is not a complete freeze. It > responds to ping and programs like top and systat continue updating. > However, all I/O operations seem to hang. >=20 > systat looks like this when it happens:=20 > https://borderworlds.dk/~xi/FreeBSD%2013%20frozen.png=20 > <https://borderworlds.dk/~xi/FreeBSD%2013%20frozen.png>; >=20 > What is the best way to debug this? Sharing top output might help (memory/swap and ZFS arc usage). Also, make sure you're not low on diskspace (these are the two most common issues I encountered with hanging bhyve VMs - out of non-virtual memory and out of diskspace of the host machine filesystem). Some basic info on the host and your VM configuration might also help others to reproduce the problem. -m --=20 Michael Gmelin
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