From: Zhan Chen <zhanc1@andrew.cmu.edu>
To: andi@firstfloor.org
Cc: linux-mm@kvack.org
Subject: 3.10 kernel issue: dequeue_hwpoisoned_huge_page fails in soft offline
Date: Tue, 12 Jul 2016 17:30:34 -0700 [thread overview]
Message-ID: <CAAs6xrw+UDeBJE1WKG9FK-YFN6xLDbA_c=_-y857fsRcO9K=Zw@mail.gmail.com> (raw)
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Hi Andi,
I encounter an issue with 3.10 kernel where soft offlined huge page can not
be dequeued. Specifically, in function soft_offline_huge_page,
dequeue_hwpoisoned_huge_page returns negative. It turns out that right
after the page is put_page, it's grabbed by some thread again.
Is there a fix that can prevent offlined pages being put back in use?
Plus, from the comment, dequeue_hwpoisoned_huge_page assumes caller holding
the page lock, which is not the case in this context, would this be a
problem in this case ?
Thank you.
-Zhan
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reply other threads:[~2016-07-13 0:30 UTC|newest]
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