On Thu, 27 Apr 2006 16:01:30 -0700
Andrew Morton <[email protected]> wrote:
> KAMEZAWA Hiroyuki <[email protected]> wrote:
> >
> > This patch registers hot-added memory to iomem_resource.
> > By this, /proc/iomem can show hot-added memory.
> > This patch is against 2.6.17-rc2-mm1.
> >
> > Note: kdump uses /proc/iomem to catch memory range when it is installed.
> > So, kdump should be re-installed after /proc/iomem change.
> >
>
> What do you mean by "kdump should be reinstalled"? The kdump userspace
> tools need to re-run kexec_load()?
>
yes. I heard an admin has to re-run kexec_load.
- http://www.uwsg.indiana.edu/hypermail/linux/kernel/0604.0/0821.html
- http://www.uwsg.indiana.edu/hypermail/linux/kernel/0604.0/0829.html
Added CC to [email protected], [email protected]
> If so, why?
>
It reads physical memory list from /proc/iomem now.
The physical memory list is read and saved at kdump kernel loading time
instead of crashing time.
> And how is kdump to know that memory was hot-added? Do we generate a
> hotplug event?
>
A user program has to make memory section online from sysfs , anyway.
The hotplug script for memory hotplug will run at memory hotplug event
from ACPI. If a user uses /probe interface (powerpc, x86_64),
he knows what he does.
hot-add -> online memory -> kexec_load() is a scenario I think of.
Thanks,
-Kame
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
