提交 68809c71 编写于 作者: F 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: NFengguang Wu <fengguang.wu@intel.com>
上级 4cd9069a
......@@ -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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