1 files changed, 74 insertions, 14 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index b5cfd047becb..b801a332fb6f 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -44,6 +44,7 @@ parameter is applicable:
         AVR32   AVR32 architecture is enabled.
         AX25    Appropriate AX.25 support is enabled.
         BLACKFIN Blackfin architecture is enabled.
+        CLK     Common clock infrastructure is enabled.
         DRM     Direct Rendering Management support is enabled.
         DYNAMIC_DEBUG Build in debug messages and enable them at runtime
         EDD     BIOS Enhanced Disk Drive Services (EDD) is enabled
@@ -320,6 +321,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                         on: enable for both 32- and 64-bit processes
                         off: disable for both 32- and 64-bit processes
 
+        alloc_snapshot  [FTRACE]
+                        Allocate the ftrace snapshot buffer on boot up when the
+                        main buffer is allocated. This is handy if debugging
+                        and you need to use tracing_snapshot() on boot up, and
+                        do not want to use tracing_snapshot_alloc() as it needs
+                        to be done where GFP_KERNEL allocations are allowed.
+
         amd_iommu=      [HW,X86-64]
                         Pass parameters to the AMD IOMMU driver in the system.
                         Possible values are:
@@ -465,6 +473,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
         cio_ignore=     [S390]
                         See Documentation/s390/CommonIO for details.
+        clk_ignore_unused
+                        [CLK]
+                        Keep all clocks already enabled by bootloader on,
+                        even if no driver has claimed them. This is useful
+                        for debug and development, but should not be
+                        needed on a platform with proper driver support.
+                        For more information, see Documentation/clk.txt.
 
         clock=          [BUGS=X86-32, HW] gettimeofday clocksource override.
                         [Deprecated]
@@ -596,9 +611,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                         is selected automatically. Check
                         Documentation/kdump/kdump.txt for further details.
 
-        crashkernel_low=size[KMG]
-                        [KNL, x86] parts under 4G.
-
         crashkernel=range1:size1[,range2:size2,...][@offset]
                         [KNL] Same as above, but depends on the memory
                         in the running system. The syntax of range is
@@ -606,6 +618,26 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                         a memory unit (amount[KMG]). See also
                         Documentation/kdump/kdump.txt for an example.
 
+        crashkernel=size[KMG],high
+                        [KNL, x86_64] range could be above 4G. Allow kernel
+                        to allocate physical memory region from top, so could
+                        be above 4G if system have more than 4G ram installed.
+                        Otherwise memory region will be allocated below 4G, if
+                        available.
+                        It will be ignored if crashkernel=X is specified.
+        crashkernel=size[KMG],low
+                        [KNL, x86_64] range under 4G. When crashkernel=X,high
+                        is passed, kernel could allocate physical memory region
+                        above 4G, that cause second kernel crash on system
+                        that require some amount of low memory, e.g. swiotlb
+                        requires at least 64M+32K low memory.  Kernel would
+                        try to allocate 72M below 4G automatically.
+                        This one let user to specify own low range under 4G
+                        for second kernel instead.
+                        0: to disable low allocation.
+                        It will be ignored when crashkernel=X,high is not used
+                        or memory reserved is below 4G.
+
         cs89x0_dma=     [HW,NET]
                         Format: <dma>
 
@@ -800,6 +832,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
         edd=            [EDD]
                         Format: {"off" | "on" | "skip[mbr]"}
 
+        efi_no_storage_paranoia [EFI; X86]
+                        Using this parameter you can use more than 50% of
+                        your efi variable storage. Use this parameter only if
+                        you are really sure that your UEFI does sane gc and
+                        fulfills the spec otherwise your board may brick.
+
         eisa_irq_edge=  [PARISC,HW]
                         See header of drivers/parisc/eisa.c.
 
@@ -2473,9 +2511,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                         In kernels built with CONFIG_RCU_NOCB_CPU=y, set
                         the specified list of CPUs to be no-callback CPUs.
                         Invocation of these CPUs' RCU callbacks will
-                        be offloaded to "rcuoN" kthreads created for
-                        that purpose.  This reduces OS jitter on the
+                        be offloaded to "rcuox/N" kthreads created for
+                        that purpose, where "x" is "b" for RCU-bh, "p"
+                        for RCU-preempt, and "s" for RCU-sched, and "N"
+                        is the CPU number.  This reduces OS jitter on the
                         offloaded CPUs, which can be useful for HPC and
+
                         real-time workloads.  It can also improve energy
                         efficiency for asymmetric multiprocessors.
 
@@ -2499,6 +2540,17 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                         leaf rcu_node structure.  Useful for very large
                         systems.
 
+        rcutree.jiffies_till_first_fqs= [KNL,BOOT]
+                        Set delay from grace-period initialization to
+                        first attempt to force quiescent states.
+                        Units are jiffies, minimum value is zero,
+                        and maximum value is HZ.
+
+        rcutree.jiffies_till_next_fqs= [KNL,BOOT]
+                        Set delay between subsequent attempts to force
+                        quiescent states.  Units are jiffies, minimum
+                        value is one, and maximum value is HZ.
+
         rcutree.qhimark=        [KNL,BOOT]
                         Set threshold of queued
                         RCU callbacks over which batch limiting is disabled.
@@ -2513,16 +2565,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
         rcutree.rcu_cpu_stall_timeout= [KNL,BOOT]
                         Set timeout for RCU CPU stall warning messages.
 
-        rcutree.jiffies_till_first_fqs= [KNL,BOOT]
-                        Set delay from grace-period initialization to
-                        first attempt to force quiescent states.
-                        Units are jiffies, minimum value is zero,
-                        and maximum value is HZ.
+        rcutree.rcu_idle_gp_delay=      [KNL,BOOT]
+                        Set wakeup interval for idle CPUs that have
+                        RCU callbacks (RCU_FAST_NO_HZ=y).
 
-        rcutree.jiffies_till_next_fqs= [KNL,BOOT]
-                        Set delay between subsequent attempts to force
-                        quiescent states.  Units are jiffies, minimum
-                        value is one, and maximum value is HZ.
+        rcutree.rcu_idle_lazy_gp_delay= [KNL,BOOT]
+                        Set wakeup interval for idle CPUs that have
+                        only "lazy" RCU callbacks (RCU_FAST_NO_HZ=y).
+                        Lazy RCU callbacks are those which RCU can
+                        prove do nothing more than free memory.
 
         rcutorture.fqs_duration= [KNL,BOOT]
                         Set duration of force_quiescent_state bursts.
@@ -3234,6 +3285,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                         or other driver-specific files in the
                         Documentation/watchdog/ directory.
 
+        workqueue.disable_numa
+                        By default, all work items queued to unbound
+                        workqueues are affine to the NUMA nodes they're
+                        issued on, which results in better behavior in
+                        general.  If NUMA affinity needs to be disabled for
+                        whatever reason, this option can be used.  Note
+                        that this also can be controlled per-workqueue for
+                        workqueues visible under /sys/bus/workqueue/.
+
         x2apic_phys     [X86-64,APIC] Use x2apic physical mode instead of
                         default x2apic cluster mode on platforms
                         supporting x2apic.