linux-kernel - [PATCH 5.0 131/146] mm/page_isolation.c: fix a wrong flag in set_migratetype

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Date:   Mon,  1 Apr 2019 19:02:23 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Michal Hocko <mhocko@...e.com>,
        Oscar Salvador <osalvador@...e.de>, Qian Cai <cai@....pw>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH 5.0 131/146] mm/page_isolation.c: fix a wrong flag in set_migratetype_isolate()

5.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Qian Cai <cai@....pw>

commit f5777bc2d9cf0712554228b1a7927b6f13f5c1f0 upstream.

Due to has_unmovable_pages() taking an incorrect irqsave flag instead of
the isolation flag in set_migratetype_isolate(), there are issues with
HWPOSION and error reporting where dump_page() is not called when there
is an unmovable page.

Link: http://lkml.kernel.org/r/20190320204941.53731-1-cai@lca.pw
Fixes: d381c54760dc ("mm: only report isolation failures when offlining memory")
Acked-by: Michal Hocko <mhocko@...e.com>
Reviewed-by: Oscar Salvador <osalvador@...e.de>
Signed-off-by: Qian Cai <cai@....pw>
Cc: <stable@...r.kernel.org>	[5.0.x]
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 mm/page_isolation.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -59,7 +59,8 @@ static int set_migratetype_isolate(struc
 	 * FIXME: Now, memory hotplug doesn't call shrink_slab() by itself.
 	 * We just check MOVABLE pages.
 	 */
-	if (!has_unmovable_pages(zone, page, arg.pages_found, migratetype, flags))
+	if (!has_unmovable_pages(zone, page, arg.pages_found, migratetype,
+				 isol_flags))
 		ret = 0;
 
 	/*