[SCSI] usb-storage: add support for write cache quirk

[platform/adaptation/renesas_rcar/renesas_kernel.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index b69cfdc..c68634e 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
 
                                          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>
        amijoy.map=     [HW,JOY] Amiga joystick support
                        Map of devices attached to JOY0DAT and JOY1DAT
                        Format: <a>,<b>


@@ -397,8 +403,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
        atkbd.softrepeat= [HW]
                        Use software keyboard repeat
 
        atkbd.softrepeat= [HW]
                        Use software keyboard repeat
 

-       autotest        [IA-64]
-

        baycom_epp=     [HW,AX25]
                        Format: <io>,<mode>
 
        baycom_epp=     [HW,AX25]
                        Format: <io>,<mode>
 


@@ -508,6 +512,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        Also note the kernel might malfunction if you disable
                        some critical bits.
 
                        Also note the kernel might malfunction if you disable
                        some critical bits.
 

+       cma=nn[MG]      [ARM,KNL]
+                       Sets the size of kernel global memory area for contiguous
+                       memory allocations. For more information, see
+                       include/linux/dma-contiguous.h
+

        cmo_free_hint=  [PPC] Format: { yes | no }
                        Specify whether pages are marked as being inactive
                        when they are freed.  This is used in CMO environments
        cmo_free_hint=  [PPC] Format: { yes | no }
                        Specify whether pages are marked as being inactive
                        when they are freed.  This is used in CMO environments


@@ -515,6 +524,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        a hypervisor.
                        Default: yes
 
                        a hypervisor.
                        Default: yes
 

+       coherent_pool=nn[KMG]   [ARM,KNL]
+                       Sets the size of memory pool for coherent, atomic dma
+                       allocations if Contiguous Memory Allocator (CMA) is used.
+

        code_bytes      [X86] How many bytes of object code to print
                        in an oops report.
                        Range: 0 - 8192
        code_bytes      [X86] How many bytes of object code to print
                        in an oops report.
                        Range: 0 - 8192


@@ -1444,8 +1457,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        devices can be requested on-demand with the
                        /dev/loop-control interface.
 
                        devices can be requested on-demand with the
                        /dev/loop-control interface.
 

-       mcatest=        [IA-64]
-

        mce             [X86-32] Machine Check Exception
 
        mce=option      [X86-64] See Documentation/x86/x86_64/boot-options.txt
        mce             [X86-32] Machine Check Exception
 
        mce=option      [X86-64] See Documentation/x86/x86_64/boot-options.txt


@@ -2532,6 +2543,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
        sched_debug     [KNL] Enables verbose scheduler debug messages.
 
 
        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
        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


@@ -2912,6 +2932,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                                        initial READ(10) command);
                                o = CAPACITY_OK (accept the capacity
                                        reported by the device);
                                        initial READ(10) command);
                                o = CAPACITY_OK (accept the capacity
                                        reported by the device);

+                               p = WRITE_CACHE (the device cache is ON
+                                       by default);

                                r = IGNORE_RESIDUE (the device reports
                                        bogus residue values);
                                s = SINGLE_LUN (the device has only one
                                r = IGNORE_RESIDUE (the device reports
                                        bogus residue values);
                                s = SINGLE_LUN (the device has only one