* Vivek Goyal [2008-07-21 09:39]: > > On Mon, Jul 21, 2008 at 03:25:39PM +0200, Bernhard Walle wrote: > > * Vivek Goyal [2008-07-21 09:17]: > > > > > > Is /proc/iomem updated upon memory hotplug event. > > > > Yes. I just checked that (yesterday). > > > > I think it would make sense to extend /sys/firmware/memmap on > > hot-plugging. Just because on reboot, the firmware will see that > > memory, too, and report it. However, we need a way to discriminate the > > originally firmware-provided memory map with later added memory. I'm > > not sure how that can be done, I have to think about it. > > Probably use another type of RAM identifier (System RAM (hotplug)). > > But the point is, if /sys/devices/system/memory also represents all > the physical memory present in the system then it might be not be > justified to create another similar interface. (Until and unless there > is something unique about /sys/firmware/memmap). But I don't see anything like a physical address there: /sys/devices/system/memory/memory2: -r--r--r-- 1 root root 4096 2008-07-21 15:45 phys_device -r--r--r-- 1 root root 4096 2008-07-21 15:45 phys_index -rw-r--r-- 1 root root 4096 2008-07-21 15:45 state (on a PPC64 machine where SUSE kernel has that interface enabled by default). Bernhard -- Bernhard Walle, SUSE LINUX Products GmbH, Architecture Development -- To unsubscribe from this list: send the line "unsubscribe kernel-testers" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
