[PATCH] x86-64: Dynamically adjust machine check interval

[linux-2.6-omap-h63xx.git] / Documentation / x86_64 / machinecheck

diff --git a/Documentation/x86_64/machinecheck b/Documentation/x86_64/machinecheck
index 068a6d9904b99a60a5c554bc5c1cfe2f2e0bcd7a..feaeaf6f6e4dd45dc03028886764d35477d2b3b9 100644 (file)
--- a/Documentation/x86_64/machinecheck
+++ b/Documentation/x86_64/machinecheck
@@ -36,7 +36,12 @@ between all CPUs.
 
 check_interval
        How often to poll for corrected machine check errors, in seconds
-       (Note output is hexademical). Default 5 minutes.
+       (Note output is hexademical). Default 5 minutes.  When the poller
+       finds MCEs it triggers an exponential speedup (poll more often) on
+       the polling interval.  When the poller stops finding MCEs, it
+       triggers an exponential backoff (poll less often) on the polling
+       interval. The check_interval variable is both the initial and
+       maximum polling interval.
 
 tolerant
        Tolerance level. When a machine check exception occurs for a non