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memory_hotplug: drop spurious calls to flush_scheduled_work()

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lru_add_drain_all() uses schedule_on_each_cpu() which is synchronous.
There is no reason to call flush_scheduled_work() after
lru_add_drain_all().  Drop the spurious calls.

This is to prepare for the deprecation and removal of
flush_scheduled_work().

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
This commit is contained in:
Tejun Heo 2010-10-19 11:08:41 +02:00
parent e24dcbef93
commit 10ccd84695
1 changed files with 0 additions and 2 deletions
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mm/memory_hotplug.c
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@ -840,7 +840,6 @@ static int offline_pages(unsigned long start_pfn,
ret = 0;
if (drain) {
lru_add_drain_all();
flush_scheduled_work();
cond_resched();
drain_all_pages();
}
@ -862,7 +861,6 @@ static int offline_pages(unsigned long start_pfn,
}
/* drain all zone's lru pagevec, this is asyncronous... */
lru_add_drain_all();
flush_scheduled_work();
yield();
/* drain pcp pages , this is synchrouns. */
drain_all_pages();