Messages in this thread Patch in this message | | | Date | Mon, 13 Dec 2010 14:43:08 +0800 | From | Wu Fengguang <> | Subject | [PATCH 19/47] writeback: fix increasement of nr_dirtied_pause |
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Fix a bug that
current->nr_dirtied_pause += current->nr_dirtied_pause >> 5;
does not effectively increase nr_dirtied_pause when it's less than 32. Thus nr_dirtied_pause may never grow up.
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> --- mm/page-writeback.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- linux-next.orig/mm/page-writeback.c 2010-12-08 22:44:27.000000000 +0800 +++ linux-next/mm/page-writeback.c 2010-12-08 22:44:28.000000000 +0800 @@ -700,7 +700,7 @@ pause: if (pause == 0 && nr_dirty < background_thresh) current->nr_dirtied_pause = ratelimit_pages(bdi); else if (pause == 1) - current->nr_dirtied_pause += current->nr_dirtied_pause >> 5; + current->nr_dirtied_pause += current->nr_dirtied_pause / 32 + 1; else if (pause >= HZ/10) /* * when repeated, writing 1 page per 100ms on slow devices,
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