Re: Linux lockups inside bhyve VM on FreeBSD 11.1
Am 01.12.2017 um 03:41 schrieb Jason Tubnor: > > On 1 December 2017 at 08:29, Kai Gallasch mailto:k...@free.de>> > wrote: > > Hello. > > Last day an apache 2.4 running inside a Debian9 linux bhyve VM locked up > on one of my servers (FreeBSD 11.1-RELENG, GENERIC kernel) overloading > the VM. > > The VM uses a ZFS zvol blockdevice on top of a zpool, consisting of two > mirrored SSDs. > > I was able to enter the VM through the bhyve console, kill and restart > the stuck apache process and regain stability inside the VM. > > I found below output in the Linux dmesg and suspect the ext4 journaling > to be the culprit. > > Has anyone experienced similar lockups running Linux inside a bhyve VM? > At the time when this happened there was no high I/O on the VM zpool. > > > Have you set vfs.zfs.arc_max to a lower value to allow for bhyve head > room? How was the host system swap, did the host start to eat into it? > > I run a few guests with Ubuntu 16.04 but mainly use XFS for areas that > aren't system related and haven't come across this issue. Hello Jason. My bhyve host server has 96GB RAM and all Linux VMs together are allocated 20GB. I now have set vfs.zfs.arc_max to 64G to see if other lockups occur. K. ___ freebsd-virtualization@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization To unsubscribe, send any mail to "freebsd-virtualization-unsubscr...@freebsd.org"
Re: Linux lockups inside bhyve VM on FreeBSD 11.1
On 1 December 2017 at 08:29, Kai Gallasch wrote: > Hello. > > Last day an apache 2.4 running inside a Debian9 linux bhyve VM locked up > on one of my servers (FreeBSD 11.1-RELENG, GENERIC kernel) overloading > the VM. > > The VM uses a ZFS zvol blockdevice on top of a zpool, consisting of two > mirrored SSDs. > > I was able to enter the VM through the bhyve console, kill and restart > the stuck apache process and regain stability inside the VM. > > I found below output in the Linux dmesg and suspect the ext4 journaling > to be the culprit. > > Has anyone experienced similar lockups running Linux inside a bhyve VM? > At the time when this happened there was no high I/O on the VM zpool. Have you set vfs.zfs.arc_max to a lower value to allow for bhyve head room? How was the host system swap, did the host start to eat into it? I run a few guests with Ubuntu 16.04 but mainly use XFS for areas that aren't system related and haven't come across this issue. Cheers, Jason. ___ freebsd-virtualization@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization To unsubscribe, send any mail to "freebsd-virtualization-unsubscr...@freebsd.org"
