Revert "mm/page_isolation: unset migratetype directly for non Buddy page"
authorChen Wandun <chenwandun@huawei.com>
Fri, 4 Feb 2022 04:49:06 +0000 (20:49 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 4 Feb 2022 17:25:04 +0000 (09:25 -0800)
commita85468b766d3bc17c8b17ed23a36ef6469340bb2
tree8aa2ba797cb19c0e17b0cf2716157af0baa9d195
parent1f2cfdd349b7647f438c1e552dc1b983da86d830
Revert "mm/page_isolation: unset migratetype directly for non Buddy page"

This reverts commit 721fb891ad0b3956d5c168b2931e3e5e4fb7ca40.

Commit 721fb891ad0b ("mm/page_isolation: unset migratetype directly for
non Buddy page") will result memory that should in buddy disappear by
mistake.  move_freepages_block moves all pages in pageblock instead of
pages indicated by input parameter, so if input pages is not in buddy
but other pages in pageblock is in buddy, it will result in page out of
control.

Link: https://lkml.kernel.org/r/20220126024436.13921-1-chenwandun@huawei.com
Fixes: 721fb891ad0b ("mm/page_isolation: unset migratetype directly for non Buddy page")
Signed-off-by: Chen Wandun <chenwandun@huawei.com>
Reported-by: "kernelci.org bot" <bot@kernelci.org>
Acked-by: David Hildenbrand <david@redhat.com>
Tested-by: Dong Aisheng <aisheng.dong@nxp.com>
Tested-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/page_isolation.c