linux-kernel - [RFC PATCH v1 3/6] ktask: add /proc/sys/debug/ktask_max

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Message-Id: <1500070573-3948-4-git-send-email-daniel.m.jordan@oracle.com>
Date:   Fri, 14 Jul 2017 15:16:10 -0700
From:   daniel.m.jordan@...cle.com
To:     linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [RFC PATCH v1 3/6] ktask: add /proc/sys/debug/ktask_max_threads

Adds a proc file to control the maximum number of ktask threads in use
for any one job.  Its primary use is to aid in debugging.

Signed-off-by: Daniel Jordan <daniel.m.jordan@...cle.com>
---
 kernel/sysctl.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 4dfba1a..7fe142b 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -67,6 +67,7 @@
 #include <linux/kexec.h>
 #include <linux/bpf.h>
 #include <linux/mount.h>
+#include <linux/ktask_internal.h>
 
 #include <linux/uaccess.h>
 #include <asm/processor.h>
@@ -1850,6 +1851,15 @@ static int sysrq_sysctl_handler(struct ctl_table *table, int write,
 		.extra2		= &one,
 	},
 #endif
+#if defined(CONFIG_KTASK)
+	{
+		.procname	= "ktask_max_threads",
+		.data		= &ktask_max_threads,
+		.maxlen		= sizeof(ktask_max_threads),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec,
+	},
+#endif
 	{ }
 };
 
-- 
1.7.1