From: Hugh Dickins <hughd@google.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Roman Gushchin <guro@fb.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@kernel.org>,
Vlastimil Babka <vbabka@suse.cz>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/4] mm: no more EINVAL from /proc/sys/vm/stat_refresh
Date: Thu, 25 Feb 2021 15:12:10 -0800 (PST) [thread overview]
Message-ID: <alpine.LSU.2.11.2102251510410.13363@eggly.anvils> (raw)
In-Reply-To: <alpine.LSU.2.11.2102251502240.13363@eggly.anvils>
EINVAL was good for drawing the refresher's attention to a warning in
dmesg, but became very tiresome when running test suites scripted with
"set -e": an underflow from a bug in one feature would cause unrelated
tests much later to fail, just because their /proc/sys/vm/stat_refresh
touch failed with that error. Stop doing that.
Signed-off-by: Hugh Dickins <hughd@google.com>
---
mm/vmstat.c | 5 -----
1 file changed, 5 deletions(-)
--- vmstat1/mm/vmstat.c 2021-02-25 11:50:36.000000000 -0800
+++ vmstat2/mm/vmstat.c 2021-02-25 11:56:18.000000000 -0800
@@ -1844,7 +1844,6 @@ int vmstat_refresh(struct ctl_table *tab
if (val < 0) {
pr_warn("%s: %s %ld\n",
__func__, zone_stat_name(i), val);
- err = -EINVAL;
}
}
#ifdef CONFIG_NUMA
@@ -1853,7 +1852,6 @@ int vmstat_refresh(struct ctl_table *tab
if (val < 0) {
pr_warn("%s: %s %ld\n",
__func__, numa_stat_name(i), val);
- err = -EINVAL;
}
}
#endif
@@ -1862,11 +1860,8 @@ int vmstat_refresh(struct ctl_table *tab
if (val < 0) {
pr_warn("%s: %s %ld\n",
__func__, node_stat_name(i), val);
- err = -EINVAL;
}
}
- if (err)
- return err;
if (write)
*ppos += *lenp;
else
next prev parent reply other threads:[~2021-02-25 23:13 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-25 23:10 [PATCH 1/4] mm: restore node stat checking in /proc/sys/vm/stat_refresh Hugh Dickins
2021-02-25 23:10 ` Hugh Dickins
2021-02-25 23:12 ` Hugh Dickins [this message]
2021-02-25 23:12 ` [PATCH 2/4] mm: no more EINVAL from /proc/sys/vm/stat_refresh Hugh Dickins
2021-03-01 0:38 ` Roman Gushchin
2021-02-25 23:14 ` [PATCH 3/4] mm: /proc/sys/vm/stat_refresh skip checking known negative stats Hugh Dickins
2021-02-25 23:14 ` Hugh Dickins
2021-03-01 0:53 ` Roman Gushchin
2021-03-01 22:08 ` Hugh Dickins
2021-03-01 22:08 ` Hugh Dickins
2021-03-02 0:34 ` Roman Gushchin
2021-03-02 6:03 ` [PATCH v2 " Hugh Dickins
2021-03-02 6:03 ` Hugh Dickins
2021-03-04 2:25 ` Roman Gushchin
2021-02-25 23:15 ` [PATCH 4/4] mm: /proc//sys/vm/stat_refresh stop checking monotonic numa stats Hugh Dickins
2021-02-25 23:15 ` Hugh Dickins
2021-03-01 0:53 ` Roman Gushchin
2021-03-01 0:37 ` [PATCH 1/4] mm: restore node stat checking in /proc/sys/vm/stat_refresh Roman Gushchin
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