Messages in this thread Patch in this message | | | Date | Thu, 12 May 2011 21:57:17 +0800 | From | Wu Fengguang <> | Subject | [PATCH 11/17] writeback: add bdi_dirty_limit() kernel-doc |
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Clarify the bdi_dirty_limit() comment.
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> --- mm/page-writeback.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-)
--- linux-next.orig/mm/page-writeback.c 2011-05-05 23:30:22.000000000 +0800 +++ linux-next/mm/page-writeback.c 2011-05-05 23:30:31.000000000 +0800 @@ -437,10 +437,17 @@ void global_dirty_limits(unsigned long * *pdirty = dirty; } -/* +/** * bdi_dirty_limit - @bdi's share of dirty throttling threshold + * @bdi: the backing_dev_info to query + * @dirty: global dirty limit in pages + * + * Returns @bdi's dirty limit in pages. The term "dirty" in the context of + * dirty balancing includes all PG_dirty, PG_writeback and NFS unstable pages. + * And the "limit" in the name is not seriously taken as hard limit in + * balance_dirty_pages(). * - * Allocate high/low dirty limits to fast/slow devices, in order to prevent + * It allocates high/low dirty limits to fast/slow devices, in order to prevent * - starving fast devices * - piling up dirty pages (that will take long time to sync) on slow devices *
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