Messages in this thread |  | | Date | Wed, 21 Aug 96 07:43 PDT | From | (Stig) | Subject | Re: getting Linux into business.. |
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Eric Youngdale wrote: > > I am wondering whether umount should be made more robust so that > it essentially forks prior to each unmount attempt. When all the children > have died we know that everything is unmounted, and we can proceed. If > one of the umounts hangs, then at least all of the remaining partitions > are cleanly unmounted.
Sounds like a really good start. Maybe it's even 90% sufficient.
A related problem is that other hung processes will have their current directories marked as active and/or open. Those processes won't die and so present an obstacle to unmounting other partitions besides the hung one. Typically these hung processes will be something along the lines of df(1).
> If some NFS partition cannot be unmounted, can we still force the > root partition back to R/O status so that it is also marked clean?
There might also be a problem with a scsi device that's disappeared, perhaps because it was generating errors or perhaps because it was turned off, or...
I would really like to see hot swap capability, too, by the way. I'd like to be able to move a tape drive between several machines w/o rebooting. Since they're not all unix, network backups aren't an option.
Stig
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