lkml.org 
[lkml]   [2007]   [Jul]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRE: [PATCH 0/2] Kexec jump: The first step to kexec base hibernation
Date
From
>From: Rafael J. Wysocki [mailto:rjw@sisk.pl]
>This is not the point. There are memory regions that you should not
_restore_,
>because that will cause harm.
>
>> On x86_64, there is another usage of nosave during processing E820
>> memory map. But I don't know why the memory region other than
E820_RAM
>> are marked as nosave. I think only the memory region of type E820_RAM
>> will be thought of normal memory, others will be thought as reserved.
Is
>> it sufficient just to check whether the page is reserved?
>
>No, it's not.

The "/proc/iomem" records information of all memory regions including
"normal RAM" and all kinds of reserved regions, which is backed by
iomem_resource. On x86_64, it is initialized in the exact same way as
nosave region initialization.

I think maybe we can replace the "nosave region" concepts with
"iomem_resource" (maybe need some enhancement).

Best Regards,
Huang Ying
-
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/

\
 
 \ /
  Last update: 2007-07-24 16:03    [W:2.658 / U:0.016 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site