mm: add overcommit_kbytes sysctl variable

[~andy/linux] / Documentation / vm / overcommit-accounting

diff --git a/Documentation/vm/overcommit-accounting b/Documentation/vm/overcommit-accounting
index 8eaa2fc4b8fae253930a798f38394438198dbf5a..cbfaaa674118daaf46e6467cf865d4cd06aae23e 100644 (file)
--- a/Documentation/vm/overcommit-accounting
+++ b/Documentation/vm/overcommit-accounting
@@ -14,8 +14,8 @@ The Linux kernel supports the following overcommit handling modes
 
 2      -       Don't overcommit. The total address space commit
                for the system is not permitted to exceed swap + a
-               configurable percentage (default is 50) of physical RAM.
-               Depending on the percentage you use, in most situations
+               configurable amount (default is 50%) of physical RAM.
+               Depending on the amount you use, in most situations
                this means a process will not be killed while accessing
                pages but will receive errors on memory allocation as
                appropriate.
@@ -26,7 +26,8 @@ The Linux kernel supports the following overcommit handling modes
 
 The overcommit policy is set via the sysctl `vm.overcommit_memory'.
 
-The overcommit percentage is set via `vm.overcommit_ratio'.
+The overcommit amount can be set via `vm.overcommit_ratio' (percentage)
+or `vm.overcommit_kbytes' (absolute value).
 
 The current overcommit limit and amount committed are viewable in
 /proc/meminfo as CommitLimit and Committed_AS respectively.