[patch V2 15/17] mm/vmscan: Adjust system_state checks

From	Thomas Gleixner <tglx@linutronix.de>
Newsgroups	linux.kernel
Subject	[patch V2 15/17] mm/vmscan: Adjust system_state checks
Date	2017-05-16 21:00 +0200
Message-ID	<tHPRn-M2-3@gated-at.bofh.it> (permalink)
References	<tHPRn-M2-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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To enable smp_processor_id() and might_sleep() debug checks earlier, it's
required to add system states between SYSTEM_BOOTING and SYSTEM_RUNNING.

Adjust the system_state check in kswapd_run() to handle the extra states.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: linux-mm@kvack.org
---
 mm/vmscan.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -3643,7 +3643,7 @@ int kswapd_run(int nid)
 	pgdat->kswapd = kthread_run(kswapd, pgdat, "kswapd%d", nid);
 	if (IS_ERR(pgdat->kswapd)) {
 		/* failure at boot is fatal */
-		BUG_ON(system_state == SYSTEM_BOOTING);
+		BUG_ON(system_state < SYSTEM_RUNNING);
 		pr_err("Failed to start kswapd on node %d\n", nid);
 		ret = PTR_ERR(pgdat->kswapd);
 		pgdat->kswapd = NULL;

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[patch V2 15/17] mm/vmscan: Adjust system_state checks Thomas Gleixner <tglx@linutronix.de> - 2017-05-16 21:00 +0200
  Re: [patch V2 15/17] mm/vmscan: Adjust system_state checks Vlastimil Babka <vbabka@suse.cz> - 2017-05-17 09:00 +0200
  [tip:sched/core] mm/vmscan: Adjust system_state checks tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2017-05-23 11:10 +0200

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