Greg KH wrote:
>> Best would be of course to generate only a single event at the same
>> time the tty device is create.
>
> That's what you are seeing. And then watching as it's being destroyed.
> And then created. And then destroyed. And so on (virtual ttys are
> nasty at times..)
wait a second, the kernel code opens /dev/console before running
init. so that should trigger that first hotplug event. and if
init is a process that does not close stdin/out/err, there should
not be any additional hotplug event, right?
I know for sure that some gentoo machine created > 3000 hotplug
events during bootup. I'm note sure if the init closed stdin/out/err,
and that installation was replaced by debian anyway, but it sure
killed the machine, if I hadn't disabled hotplugging (3000 bash
processes need more ram than a normal machine has).
init strarts processes and those sure have stdin/out/err open,
so they can write to the console. so I somehow doubt it closes
and opens those all the time, but I haven't checked the code.
so I wonder: is or was there any bug in the kernel where hundreds
or thousands of hotplug requests are created, simply because
processed are executed?
it is a fact I saw thousands of hotplug events during a boot sequence.
I'd like to know why that happened, and whether it would happen again.
rm -rf /sbin/hotplug and switching to udevd is once option to solve
the problem, but not an explanation why it happened in the first place.
Regards, Andreas
p.a. I don't use udevd, but my initramfs disables hotplug and
the last initscript enables it again. also works ok.
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