Messages in this thread | | | Date | Tue, 21 Nov 2017 14:12:13 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH] mm: migrate: fix an incorrect call of prep_transhuge_page() |
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On Mon, 20 Nov 2017 21:18:55 -0500 Zi Yan <zi.yan@sent.com> wrote:
> In [1], Andrea reported that during memory hotplug/hot remove > prep_transhuge_page() is called incorrectly on non-THP pages for > migration, when THP is on but THP migration is not enabled. > This leads to a bad state of target pages for migration. > > This patch fixes it by only calling prep_transhuge_page() when we are > certain that the target page is THP.
What are the user-visible effects of the bug?
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