SCSI & usb-storage: add try_rc_10_first flag

[~andy/linux] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index b40b413db88e2aeea1f19f2200dbf6049da36206..a92c5ebf373e2bf4bea68072b58fbc0471ad9c13 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -335,6 +335,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                                          requirements as needed. This option
                                          does not override iommu=pt
 
+       amd_iommu_dump= [HW,X86-64]
+                       Enable AMD IOMMU driver option to dump the ACPI table
+                       for AMD IOMMU. With this option enabled, AMD IOMMU
+                       driver will print ACPI tables for AMD IOMMU during
+                       IOMMU initialization.
+
        amijoy.map=     [HW,JOY] Amiga joystick support
                        Map of devices attached to JOY0DAT and JOY1DAT
                        Format: <a>,<b>
@@ -2537,6 +2543,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
        sched_debug     [KNL] Enables verbose scheduler debug messages.
 
+       skew_tick=      [KNL] Offset the periodic timer tick per cpu to mitigate
+                       xtime_lock contention on larger systems, and/or RCU lock
+                       contention on all systems with CONFIG_MAXSMP set.
+                       Format: { "0" | "1" }
+                       0 -- disable. (may be 1 via CONFIG_CMDLINE="skew_tick=1"
+                       1 -- enable.
+                       Note: increases power consumption, thus should only be
+                       enabled if running jitter sensitive (HPC/RT) workloads.
+
        security=       [SECURITY] Choose a security module to enable at boot.
                        If this boot parameter is not specified, only the first
                        security module asking for security registration will be