Commit 68809c71 authored May 06, 2012 by Fengguang Wu

writeback: initialize global_dirty_limit



This prevents global_dirty_limit from remaining 0 (the initial value)
for long time, since it's only updated in update_dirty_limit() when
above the dirty freerun area.

It will avoid unexpected consequences when some random code use it as a
convenient approximation of the global dirty threshold.

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>

parent 4cd9069a

mm/page-writeback.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1568,6 +1568,7 @@ void writeback_set_ratelimit(void)
		unsigned long background_thresh;
		unsigned long dirty_thresh;
		global_dirty_limits(&background_thresh, &dirty_thresh);
		global_dirty_limit = dirty_thresh;
		ratelimit_pages = dirty_thresh / (num_online_cpus() * 32);
		if (ratelimit_pages < 16)
		ratelimit_pages = 16;

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