smp,csd: Throw an error if a CSD lock is stuck for too long

[platform/kernel/linux-rpi.git] / Documentation / admin-guide / kernel-parameters.txt

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 0a1731a..4164433 100644 (file)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -5858,6 +5858,13 @@
                        This feature may be more efficiently disabled
                        using the csdlock_debug- kernel parameter.
 
+       smp.panic_on_ipistall= [KNL]
+                       If a csd_lock_timeout extends for more than
+                       the specified number of milliseconds, panic the
+                       system.  By default, let CSD-lock acquisition
+                       take as long as they take.  Specifying 300,000
+                       for this value provides a 5-minute timeout.
+
        smsc-ircc2.nopnp        [HW] Don't use PNP to discover SMC devices
        smsc-ircc2.ircc_cfg=    [HW] Device configuration I/O port
        smsc-ircc2.ircc_sir=    [HW] SIR base I/O port