From: Roman Gushchin <guro@fb.com>
To: Hugh Dickins <hughd@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
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: Re: [PATCH 4/4] mm: /proc//sys/vm/stat_refresh stop checking monotonic numa stats
Date: Sun, 28 Feb 2021 16:53:32 -0800 [thread overview]
Message-ID: <YDw7DN/Q6cBEyyuc@carbon.dhcp.thefacebook.com> (raw)
In-Reply-To: <alpine.LSU.2.11.2102251514110.13363@eggly.anvils>
On Thu, Feb 25, 2021 at 03:15:42PM -0800, Hugh Dickins wrote:
> All of the VM NUMA stats are event counts, incremented never decremented:
> it is not very useful for vmstat_refresh() to check them throughout their
> first aeon, then warn on them throughout their next.
>
> Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Roman Gushchin <guro@fb.com>
Thanks!
> ---
>
> mm/vmstat.c | 9 ---------
> 1 file changed, 9 deletions(-)
>
> --- vmstat3/mm/vmstat.c 2021-02-25 12:42:15.000000000 -0800
> +++ vmstat4/mm/vmstat.c 2021-02-25 12:44:20.000000000 -0800
> @@ -1854,15 +1854,6 @@ int vmstat_refresh(struct ctl_table *tab
> __func__, zone_stat_name(i), val);
> }
> }
> -#ifdef CONFIG_NUMA
> - for (i = 0; i < NR_VM_NUMA_STAT_ITEMS; i++) {
> - val = atomic_long_read(&vm_numa_stat[i]);
> - if (val < 0) {
> - pr_warn("%s: %s %ld\n",
> - __func__, numa_stat_name(i), val);
> - }
> - }
> -#endif
> for (i = 0; i < NR_VM_NODE_STAT_ITEMS; i++) {
> /*
> * Skip checking stats known to go negative occasionally.
next prev parent reply other threads:[~2021-03-01 0:53 UTC|newest]
Thread overview: 12+ 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 23:12 ` [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
2021-03-01 0:53 ` Roman Gushchin
2021-03-01 22:08 ` Hugh Dickins
2021-03-02 0:34 ` Roman Gushchin
2021-03-02 6:03 ` [PATCH v2 " Hugh Dickins
2021-03-04 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
2021-03-01 0:53 ` Roman Gushchin [this message]
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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