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From: Ni zhan Chen <nizhan.chen@gmail.com>
To: Linux Memory Management List <linux-mm@kvack.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>,
	Petr Holasek <pholasek@redhat.com>,
	Hugh Dickins <hughd@google.com>,
	Chris Wright <chrisw@sous-sol.org>,
	Rik van Riel <riel@redhat.com>,
	Izik Eidus <izik.eidus@ravellosystems.com>
Subject: ksm questions
Date: Wed, 24 Oct 2012 19:19:45 +0800	[thread overview]
Message-ID: <5087CED1.2030307@gmail.com> (raw)

Hi all,

I have some questions about ksm.

1) khugepaged default nice value is 19, but ksmd default nice value is 
5, why this big different?
2) why ksm doesn't support pagecache and tmpfs now? What's the bottleneck?
3) ksm kernel doc said that "KSM only merges anonymous(private) pages, 
never pagecache(file) pages". But where judege it should be private?
4) ksm kernel doc said that "To avoid the instability and the resulting 
false negatives to be permanent, KSM re-initializes the unstable tree 
root node to an empty tree, at every KSM pass." But I can't find where 
re-initializes the unstable tree, could you explain me?

Thanks in advance. :-)

Regards,
Chen

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             reply	other threads:[~2012-10-24 11:19 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-24 11:19 Ni zhan Chen [this message]
2012-10-24 11:46 ` Izik Eidus
2012-10-24 11:59   ` Ni zhan Chen
2012-10-24 12:02     ` Izik Eidus
2012-10-24 12:16       ` Ni zhan Chen
2012-10-24 12:20         ` Izik Eidus
2012-10-24 12:35   ` Ni zhan Chen
2012-10-24 12:40   ` Ni zhan Chen

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