Messages in this thread | | | Date | Mon, 14 Oct 2002 17:59:09 -0700 | From | Greg KH <> | Subject | Re: [ANNOUNCE] [PATCHES] Advanced TCA Hotswap Support in Linux Kernel |
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On Mon, Oct 14, 2002 at 11:42:15AM -0700, Steven Dake wrote: > lkml, > > http://www.sourceforge.net/project/showfiles.php?group_id=64580 > > I am announcing a sourceforge project for developing support in Linux > kernel for Advanced TCA (PICMG 3.0) architecture. Advanced TCA is a > technology where boards exist in a chassis and can either be processor > nodes or storage nodes. All boards in the chassis are connected by > FibreChannel and Ethernet. The blades can be hot added or hot removed > while the Linux processor nodes are active, meaning, that the SCSI > subsystem must add devices on insertion request and remove devices on > ejection requests. Further the typical /dev/sda naming of devices is > not appropriate since device nodes can change depending on the insertion > order of disks. > > These patches are for Linux 2.4.19 and work with the Qlogic 2300 > FibreChannel driver and at this point mostly support hotswap of the disk > subsystem.
Some questions: - is there a public spec for this architecture? - are you going to be generating a 2.5 version of this so that this feature can be added to the main kernel tree? - Why don't you use the existing kernel way of notifying userspace of hotplug events, through /sbin/hotplug? - You create a lot of new ioctls, which is not nice. You should probably do what was done for the pci hotplug subsystem, and create a ram based filesystem for this subsystem. That way you don't need to have a /dev node, and the userspace tools become dirt simple.
thanks,
greg k-h - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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