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-rw-r--r--Documentation/admin-guide/kernel-parameters.txt10
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index fa08ec0dfbe7..54582ca6c4f9 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -782,6 +782,16 @@
cs89x0_media= [HW,NET]
Format: { rj45 | aui | bnc }
+ csdlock_debug= [KNL] Enable debug add-ons of cross-CPU function call
+ handling. When switched on, additional debug data is
+ printed to the console in case a hanging CPU is
+ detected, and that CPU is pinged again in order to try
+ to resolve the hang situation.
+ 0: disable csdlock debugging (default)
+ 1: enable basic csdlock debugging (minor impact)
+ ext: enable extended csdlock debugging (more impact,
+ but more data)
+
dasd= [HW,NET]
See header of drivers/s390/block/dasd_devmap.c.