brain-hackers_pepepper-mirror/linux-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/linux-brain.git synced 2024-06-09 07:16:21 +09:00
Code Issues Projects Releases Wiki Activity

writeback: add bdi_dirty_limit() kernel-doc

Browse Source 
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>
This commit is contained in:
Wu Fengguang 2011-03-02 17:14:34 -06:00
parent e185dda89d
commit 6f71865627
1 changed files with 9 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
mm/page-writeback.c
View File

@ -437,10 +437,17 @@ void global_dirty_limits(unsigned long *pbackground, unsigned long *pdirty)
*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
*
* Allocate high/low dirty limits to fast/slow devices, in order to prevent
* 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().
*
* 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
*