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Message-Id: <20220418121201.102275824@linuxfoundation.org>
Date: Mon, 18 Apr 2022 14:11:58 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Bharata B Rao <bharata@....com>,
"Peter Zijlstra (Intel)" <peterz@...radead.org>,
Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
Mel Gorman <mgorman@...e.de>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 052/218] sched/debug: Remove mpol_get/put and task_lock/unlock from sched_show_numa
From: Bharata B Rao <bharata@....com>
[ Upstream commit 28c988c3ec29db74a1dda631b18785958d57df4f ]
The older format of /proc/pid/sched printed home node info which
required the mempolicy and task lock around mpol_get(). However
the format has changed since then and there is no need for
sched_show_numa() any more to have mempolicy argument,
asssociated mpol_get/put and task_lock/unlock. Remove them.
Fixes: 397f2378f1361 ("sched/numa: Fix numa balancing stats in /proc/pid/sched")
Signed-off-by: Bharata B Rao <bharata@....com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Acked-by: Mel Gorman <mgorman@...e.de>
Link: https://lore.kernel.org/r/20220118050515.2973-1-bharata@amd.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
kernel/sched/debug.c | 10 ----------
1 file changed, 10 deletions(-)
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index fa178b62ea79..69c3252d151b 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -836,25 +836,15 @@ void print_numa_stats(struct seq_file *m, int node, unsigned long tsf,
static void sched_show_numa(struct task_struct *p, struct seq_file *m)
{
#ifdef CONFIG_NUMA_BALANCING
- struct mempolicy *pol;
-
if (p->mm)
P(mm->numa_scan_seq);
- task_lock(p);
- pol = p->mempolicy;
- if (pol && !(pol->flags & MPOL_F_MORON))
- pol = NULL;
- mpol_get(pol);
- task_unlock(p);
-
P(numa_pages_migrated);
P(numa_preferred_nid);
P(total_numa_faults);
SEQ_printf(m, "current_node=%d, numa_group_id=%d\n",
task_node(p), task_numa_group_id(p));
show_numa_stats(p, m);
- mpol_put(pol);
#endif
}
--
2.34.1
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