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mm/vmalloc: make sure to dump unpurged areas in /proc/vmallocinfo

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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: dd3b8353ba ("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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Eric Dumazet 2021-11-05 13:39:28 -07:00 committed by Linus Torvalds
parent 51e50b3a22
commit 7cc7913e8e
1 changed files with 2 additions and 1 deletions
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3
mm/vmalloc.c
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@ -3913,7 +3913,7 @@ static int s_show(struct seq_file *m, void *p)
(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, void *p)
/*
* As a final step, dump "unpurged" areas.
*/
final:
if (list_is_last(&va->list, &vmap_area_list))
show_purge_info(m);