Date: Sat, 19 Mar 2016 20:32:57 -0700 From: "Russell L. Carter" <rcarter@pinyon.org> To: Paul Vixie <paul@redbarn.org> Cc: freebsd-virtualization@freebsd.org Subject: Re: UFS vs. ZFS inside bhyve hosted on ZFS Message-ID: <56EE19E9.7040403@pinyon.org> In-Reply-To: <56EE1550.4060403@redbarn.org> References: <56ECAFEB.8060305@pinyon.org> <56EE1468.5050503@pinyon.org> <56EE1550.4060403@redbarn.org>
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On 03/19/16 20:13, Paul Vixie wrote: > > > Russell L. Carter wrote: >> ... I have two bhyve VMs configured >> identically, both running r297047, each configured with 15G of RAM and >> 3 cpus, verified by examining 'sysctl hw' from within the running >> guest. One has the default ZFS install, the other UFS. However, >> >> # cd /usr/src && make buildworld -j <anything> >> >> after 15 minutes or so freezes the -current-UFS guest with the >> following console output: >> >> root@vm1:~ # ahcich0: Timeout on slot 29 port 0 >> ahcich0: is 00000008 cs 00000000 ss 00000000 rs bfffffff tfd 50 serr >> 00000000 cmd 0001dd17 >> (ada0:ahcich0:0:0:0): WRITE_FPDMA_QUEUED. ACB: 61 40 70 dc 3a 40 00 00 >> 00 00 00 00 >> (ada0:ahcich0:0:0:0): CAM status: Command timeout >> (ada0:ahcich0:0:0:0): Retrying command > > two questions: > > why ada rather than vtblk? No idea. I chose the default UFS selection in the iso installer. Happy to change it to something better. > > is the host's backing store made with 'zfs create -V', or is it 'truncate'? > From https://github.com/pr1ntf/iohyve/blob/master/iohyve: zfs create -V $size -o volmode=dev $pool/iohyve/$name/disk0 where $size is 32G. Neither side of (host/guest) looks even slightly cramped after the fact. Best, Russell
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