At Tue, 25 Mar 2025 19:31:21 +0900, Ryota Ozaki <ozaki-r%netbsd.org@localhost> wrote: Subject: Re: File sharing over virtio-9p > > vio9p is not optimized for performance yet, for example, it can serve > each request synchronously. Good to know. > > I wonder is there anything NetBSD, i.e. vio9p(4), can do to cleanly shut > > down the 9p connection and allow it to be reused without having to > > restart the host QEMU process? This would be nice as then a VM could > > reboot itself without having to use the host tools to restart. > > umount /9pfs before rebooting might help you. > > vio9p itself is just a bridge between a client and a server of 9p, so > it doesn't help for shutting down the 9p connection over it, I think. Indeed -- I tried a unmounting before a reboot and the mount worked again with no problem this time. I'm not sure why there could or would be any difference between vfs_shutdown() calling dounmount() vs. the call from sys_unmount(). Perhaps it is just a matter of timing, or whether or not some previous activity had occurred, or maybe it's entirely an issue on the QEMU side. -- Greg A. Woods <gwoods%acm.org@localhost> Kelowna, BC +1 250 762-7675 RoboHack <woods%robohack.ca@localhost> Planix, Inc. <woods%planix.com@localhost> Avoncote Farms <woods%avoncote.ca@localhost>
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