From: David Brownell <david-b@pacbell.net>
To: linux-hotplug@vger.kernel.org
Subject: Re: PCI Hot Plug Operation
Date: Mon, 06 May 2002 17:16:08 +0000 [thread overview]
Message-ID: <marc-linux-hotplug-102070594004589@msgid-missing> (raw)
In-Reply-To: <marc-linux-hotplug-102044288121120@msgid-missing>
> > Do I need to install a driver for my card to make the kernel aware of a
> > possible hot pluggable device?
>
> PCI Hotplug only works if you have a PCI Hotplug controller on your
> motherboard. This is usually only on high end servers or cPCI machines.
> Do you have such a machine?
Erm, when did that change?
There might be confusion about the several different types of PCI hotplug
that can happen. It started out as a generic term in Linux, not specific
to a specific technology.
- The original Linux PCI hotplug support worked well for CardBus.
Plug in a new CardBus device ("PC-Card" form factor with PCI
bus, often mis-termed PCMCIA) and get a hotplug event.
- Docking station support ... I'm not clear what the status here
is, but some of them support CardBus, so they should inherit
a certain level of hotplug support from that.
- Compaq's "PCI Hotplug" support is, as Greg said, for higher
end hardware ... aiming at "more nines than usual" availability.
- The "Compact PCI" stuff is a different form factor (VME?) that
is likewise targetted at high availability applications, where it
is not practical to take systems down to reconfigure hardware.
Admittedly you need to configure the support for those kinds of
bus into your system, but "/sbin/hotplug pci" can be invoked without
any "PCI Hotplug" (or CompactPCI) controller ... laptops do it.
- Dave
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prev parent reply other threads:[~2002-05-06 17:16 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-03 15:16 PCI Hot Plug Operation Greg KH
2002-05-03 15:40 ` Greg KH
2002-05-03 16:00 ` Bill Bruce
2002-05-03 16:53 ` Greg KH
2002-05-03 17:48 ` Stephen Williams
2002-05-04 8:33 ` Paul Hedderly
2002-05-04 8:57 ` David Woodhouse
2002-05-06 16:32 ` Greg KH
2002-05-06 17:16 ` David Brownell [this message]
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