diff mbox series

[092/262] mm/vmalloc: make sure to dump unpurged areas in /proc/vmallocinfo

Message ID 20211105203928.VUhnNzshg%akpm@linux-foundation.org (mailing list archive)
State New
Headers show
Series [001/262] scripts/spelling.txt: add more spellings to spelling.txt | expand

Commit Message

Andrew Morton Nov. 5, 2021, 8:39 p.m. UTC 
From: Eric Dumazet <edumazet@google.com>
Subject: mm/vmalloc: make sure to dump unpurged areas in /proc/vmallocinfo

If last va found in vmap_area_list does not have a vm pointer,
vmallocinfo.s_show() returns 0, and show_purge_info() is not called as it
should.

Link: https://lkml.kernel.org/r/20211001170815.73321-1-eric.dumazet@gmail.com
Fixes: dd3b8353bae7 ("mm/vmalloc: do not keep unpurged areas in the busy tree")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Pengfei Li <lpf.vector@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/vmalloc.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

--- a/mm/vmalloc.c~mm-vmalloc-make-sure-to-dump-unpurged-areas-in-proc-vmallocinfo
+++ a/mm/vmalloc.c
@@ -3913,7 +3913,7 @@  static int s_show(struct seq_file *m, vo
 			(void *)va->va_start, (void *)va->va_end,
 			va->va_end - va->va_start);
 
-		return 0;
+		goto final;
 	}
 
 	v = va->vm;
@@ -3954,6 +3954,7 @@  static int s_show(struct seq_file *m, vo
 	/*
 	 * As a final step, dump "unpurged" areas.
 	 */
+final:
 	if (list_is_last(&va->list, &vmap_area_list))
 		show_purge_info(m);