mm: improve the description for dirty_background_ratio/dirty_ratio sysctl
authorZheng Liu <wenqing.lz@taobao.com>
Tue, 12 Nov 2013 23:08:30 +0000 (15:08 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 13 Nov 2013 03:09:11 +0000 (12:09 +0900)
commit715ea41e60277f28f84d6c937737350e00955d56
treec8046aac7007ecb657f56fae897df195c2d2761b
parenta1aeb65a4c80d8e97eca8bcde02a5aeae11f6201
mm: improve the description for dirty_background_ratio/dirty_ratio sysctl

Now dirty_background_ratio/dirty_ratio contains a percentage of total
avaiable memory, which contains free pages and reclaimable pages.  The
number of these pages is not equal to the number of total system memory.
But they are described as a percentage of total system memory in
Documentation/sysctl/vm.txt.  So we need to fix them to avoid
misunderstanding.

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Cc: Rob Landley <rob@landley.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Documentation/sysctl/vm.txt