Messages in this thread | | | Date | Thu, 3 Oct 2002 09:13:20 -0700 | From | Greg KH <> | Subject | Re: EVMS Submission for 2.5 |
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On Thu, Oct 03, 2002 at 10:51:39AM -0400, Alexander Viro wrote: > > > On Thu, 3 Oct 2002, Kevin Corry wrote: > > > > I might agree with something along the lines of > > > * when evms is initialized, it's notified of all existing gendisks > > > * whenever disk is added after evms initialization, we notify evms > > > * whenever disk is removed, we notify evms > > > > This sounds like it would be exactly what EVMS needs. The only thing we would > > want to add to this list is: "*whenever a disk is modified, notify evms". For > > example, with removable media drives (such as Zip and Jaz), when a cartidge > > is changed, the capacity of the drive might change, and we would like to be > > notified of that event. > > Umm... OK. There were some plans to add a notifier chain for such events > and EVMS looks like a possible user of that beast. However, it's not > obvious whether we need to do any of that in the kernel - we definitely > can have userland up and running before _any_ block devices are initialized, > so it might be a work for userland helper.
/sbin/hotplug already gets called for _every_ device that is added to the system as of 2.5.40, so you should probably use that as your userspace notifier event. If there's anything that the /sbin/hotplug call misses, that you need for evms, please let me know.
thanks,
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