Messages in this thread Patch in this message | | | Date | Thu, 3 May 2012 11:53:13 +0800 | From | Fengguang Wu <> | Subject | [PATCH] writeback: initialize global_dirty_limit |
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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> --- mm/page-writeback.c | 1 + 1 file changed, 1 insertion(+)
--- linux-next.orig/mm/page-writeback.c 2012-04-25 20:16:12.766859391 +0800 +++ linux-next/mm/page-writeback.c 2012-05-03 11:44:32.746272930 +0800 @@ -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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