From 7a9e6da11c9478741947de3a37ac7de26abd23f0 Mon Sep 17 00:00:00 2001 From: Petr Oros Date: Thu, 22 May 2014 14:04:44 +0200 Subject: doc: fix incorrect formula to calculate CommitLimit value The formula to calculate "CommitLimit" value mentioned in kernel documentation is incorrect. Right formula is: CommitLimit = ([total RAM pages] - [total huge TLB pages]) * overcommit_ratio / 100 + [total swap pages] Signed-off-by: Petr Oros Acked-by: Randy Dunlap Signed-off-by: Jiri Kosina --- Documentation/filesystems/proc.txt | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'Documentation/filesystems') diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index d4fa7f52034e..324328d18464 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt @@ -854,7 +854,8 @@ WritebackTmp: Memory used by FUSE for temporary writeback buffers if strict overcommit accounting is enabled (mode 2 in 'vm.overcommit_memory'). The CommitLimit is calculated with the following formula: - CommitLimit = ('vm.overcommit_ratio' * Physical RAM) + Swap + CommitLimit = ([total RAM pages] - [total huge TLB pages]) * + overcommit_ratio / 100 + [total swap pages] For example, on a system with 1G of physical RAM and 7G of swap with a `vm.overcommit_ratio` of 30 it would yield a CommitLimit of 7.3G. -- cgit