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Commit 68809c71 authored by Fengguang Wu's avatar Fengguang Wu
Browse files

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: default avatarFengguang 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;