Messages in this thread | | | Date | Fri, 16 Apr 2004 16:39:44 -0700 | From | Grant Grundler <> | Subject | Re: [Pcihpd-discuss] [RFC] New sysfs tree for hotplug |
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On Fri, Apr 16, 2004 at 03:34:36PM -0700, Greg KH wrote: > > Recent large machines have many PCI devices and some boards that > > contain devices (e.g. CPU, memory, and/or I/O devices). A certain PCI > > device (PCI1) might be connected with other one (PCI2), which means that > > there is a dependency between PCI1 and PCI2. > > You have this today?
I interpreted his comments to mean PCI-PCI Bridges. eg something like a 4-port NIC which usually has a PCI-PCI bridge to "isolate" multiple PCI devices (NICs): +-[60]---01.0-[61]--+-04.0 Digital Equipment Corporation DECchip 21142/43 | +-05.0 Digital Equipment Corporation DECchip 21142/43 | +-06.0 Digital Equipment Corporation DECchip 21142/43 | \-07.0 Digital Equipment Corporation DECchip 21142/43 ...
I thought this was already handled though so I may be misunderstanding. Keiichiro, an example would be very helpful in understanding.
... > Hm, no. What about usb, firewire, scsi and any other future bus that > can be "hotpluggable". The kernel doesn't treat them differently, and > we shouldn't either.
SCSI has a heirarchy as well. Ie LUNs can be removed without removing the target (RAID controllers). Normal JBOD use equates LUNs and targets.
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