[patch 11/15] mm, oom: keep oom_adj under or at upper limit when printing

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From: Charles Haithcock <chaithco@xxxxxxxxxx>
Subject: mm, oom: keep oom_adj under or at upper limit when printing

For oom_score_adj values in the range [942,999], the current
calculations will print 16 for oom_adj. This patch simply limits the
output so output is inline with docs.

Link: https://lkml.kernel.org/r/20201020165130.33927-1-chaithco@xxxxxxxxxx
Signed-off-by: Charles Haithcock <chaithco@xxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 fs/proc/base.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/fs/proc/base.c~mm-oom-keep-oom_adj-under-or-at-upper-limit-when-printing
+++ a/fs/proc/base.c
@@ -1049,6 +1049,8 @@ static ssize_t oom_adj_read(struct file
 		oom_adj = (task->signal->oom_score_adj * -OOM_DISABLE) /
 			  OOM_SCORE_ADJ_MAX;
 	put_task_struct(task);
+	if (oom_adj > OOM_ADJUST_MAX)
+		oom_adj = OOM_ADJUST_MAX;
 	len = snprintf(buffer, sizeof(buffer), "%d\n", oom_adj);
 	return simple_read_from_buffer(buf, count, ppos, buffer, len);
 }
_



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