tree 98cdf246280c59e0bf044ae6d2c229fc27b73203
parent 189d3c4a94ef19fca2a71a6a336e9fda900e25e7
author Peter Zijlstra <a.p.zijlstra@chello.nl> 1209542076 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1209569390 -0700

mm: bdi: allow setting a maximum for the bdi dirty limit

Add "max_ratio" to /sys/class/bdi.  This indicates the maximum percentage of
the global dirty threshold allocated to this bdi.

[mszeredi@suse.cz]

 - fix parsing in max_ratio_store().
 - export bdi_set_max_ratio() to modules
 - limit bdi_dirty with bdi->max_ratio
 - document new sysfs attribute

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>