[PATCH 0/3] makedumpfile: hugepage filtering for vmcore dump
jingbai.ma at hp.com
Tue Nov 5 20:47:49 EST 2013
On 11/06/2013 04:26 AM, Vivek Goyal wrote:
> On Tue, Nov 05, 2013 at 09:45:32PM +0800, Jingbai Ma wrote:
>> This patch set intend to exclude unnecessary hugepages from vmcore dump file.
>> This patch requires the kernel patch to export necessary data structures into
>> vmcore: "kexec: export hugepage data structure into vmcoreinfo"
>> This patch introduce two new dump levels 32 and 64 to exclude all unused and
>> active hugepages. The level to exclude all unnecessary pages will be 127 now.
> Interesting. Why hugepages should be treated any differentely than normal
> If user asked to filter out free page, then it should be filtered and
> it should not matter whether it is a huge page or not?
Yes, free hugepages should be filtered out with other free pages. It
But for active hugepages, I would offer user more choices/flexibility.
I'm OK to filter active hugepages with other user data page.
Any other comments?
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