Revert "mm/vmstat.c: do not show lowmem reserve protection information of empty zone"
authorBaoquan He <bhe@redhat.com>
Sat, 15 Aug 2020 00:30:07 +0000 (17:30 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sat, 15 Aug 2020 02:56:56 +0000 (19:56 -0700)
commita8a4b7aeaf841311cb13ff0f6c4710c7a00e68d4
treeddc871d32ffa43d62a80c02275a831598fcfb4b2
parent9922c1deff915c2b67ec79ea6b87c289772c6492
Revert "mm/vmstat.c: do not show lowmem reserve protection information of empty zone"

This reverts commit 26e7deadaae175.

Sonny reported that one of their tests started failing on the latest
kernel on their Chrome OS platform.  The root cause is that the above
commit removed the protection line of empty zone, while the parser used in
the test relies on the protection line to mark the end of each zone.

Let's revert it to avoid breaking userspace testing or applications.

Fixes: 26e7deadaae175 ("mm/vmstat.c: do not show lowmem reserve protection information of empty zone)"
Reported-by: Sonny Rao <sonnyrao@chromium.org>
Signed-off-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: <stable@vger.kernel.org> [5.8.x]
Link: http://lkml.kernel.org/r/20200811075412.12872-1-bhe@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/vmstat.c