Re: [Xen-devel] [RFC][PATCH] Use ioemu block drivers through blktap

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 31/3/08 14:23, "Ian Jackson" <Ian.Jackson@xxxxxxxxxxxxx> wrote:

>> I think in your classification they are "not really necessary" cleanups.
>> But that's no reason not to do them, right?
> 
> Yes, but to avoid gradually accumulating an ever increasing amount of
> cruft, that cleanup mechanism ought to be capable of cleaning up even
> `lost' garbage of one kind or another.  And once you've got such a
> garbage collecting cleanup arrangement, you don't need any separate
> atexit-like arrangement which cleans up specifically after the current
> run.

The SIGHUP was only introduced in the first place to allow cleanup when
using stub domains. In that case the SIGHUP goes to a qemu-dm 'proxy script'
which then kills the actual stub domain. That's another case where the
mechanism for tearing down such pervasive state really belongs in xend, in
my opinion. I would be very much up for seeing us going back to SIGKILL of
qemu-dm processes.

 -- Keir



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