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authorSeongJae Park <sjpark@amazon.de>2020-06-07 21:40:04 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-08 11:05:55 -0700
commit92fb1db26eefc11554820f11ce8e92007da2fbf4 (patch)
tree5de7e60db1dad71f124f9ec55d421022bed61122 /ipc
parent9aa900c8094dba7a60dc805ecec1e9f720744ba1 (diff)
mm/page_idle.c: skip offline pages
'Idle page tracking' users can pass random pfn that might be mapped to an offline page. To avoid accessing such pages, this commit modifies the 'page_idle_get_page()' to use 'pfn_to_online_page()' instead of 'pfn_valid()' and 'pfn_to_page()' combination, so that the pfn mapped to an offline page can be skipped. Reported-by: David Hildenbrand <david@redhat.com> Signed-off-by: SeongJae Park <sjpark@amazon.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Link: http://lkml.kernel.org/r/20200605092502.18018-2-sjpark@amazon.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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