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 f995195409fd699c0e657ac1b12d3ce59267e0b2..a92c5ebf373e2bf4bea68072b58fbc0471ad9c13 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -70,7 +70,6 @@ parameter is applicable:
        M68k    M68k architecture is enabled.
                        These options have more detailed description inside of
                        Documentation/m68k/kernel-options.txt.
        M68k    M68k architecture is enabled.
                        These options have more detailed description inside of
                        Documentation/m68k/kernel-options.txt.

-       MCA     MCA bus support is enabled.

        MDA     MDA console support is enabled.
        MIPS    MIPS architecture is enabled.
        MOUSE   Appropriate mouse support is enabled.
        MDA     MDA console support is enabled.
        MIPS    MIPS architecture is enabled.
        MOUSE   Appropriate mouse support is enabled.


@@ -110,6 +109,7 @@ parameter is applicable:
        USB     USB support is enabled.
        USBHID  USB Human Interface Device support is enabled.
        V4L     Video For Linux support is enabled.
        USB     USB support is enabled.
        USBHID  USB Human Interface Device support is enabled.
        V4L     Video For Linux support is enabled.

+       VMMIO   Driver for memory mapped virtio devices is enabled.

        VGA     The VGA console has been enabled.
        VT      Virtual terminal support is enabled.
        WDT     Watchdog support is enabled.
        VGA     The VGA console has been enabled.
        VT      Virtual terminal support is enabled.
        WDT     Watchdog support is enabled.


@@ -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


@@ -610,7 +623,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
        ddebug_query=   [KNL,DYNAMIC_DEBUG] Enable debug messages at early boot
                        time. See Documentation/dynamic-debug-howto.txt for
 
        ddebug_query=   [KNL,DYNAMIC_DEBUG] Enable debug messages at early boot
                        time. See Documentation/dynamic-debug-howto.txt for

-                       details.
+                       details.  Deprecated, see dyndbg.

 
        debug           [KNL] Enable kernel debugging (events log level).
 
 
        debug           [KNL] Enable kernel debugging (events log level).
 


@@ -730,6 +743,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
        dscc4.setup=    [NET]
 
 
        dscc4.setup=    [NET]
 

+       dyndbg[="val"]          [KNL,DYNAMIC_DEBUG]
+       module.dyndbg[="val"]
+                       Enable debug messages at boot time.  See
+                       Documentation/dynamic-debug-howto.txt for details.
+

        earlycon=       [KNL] Output early console device and options.
                uart[8250],io,<addr>[,options]
                uart[8250],mmio,<addr>[,options]
        earlycon=       [KNL] Output early console device and options.
                uart[8250],io,<addr>[,options]
                uart[8250],mmio,<addr>[,options]


@@ -982,6 +1000,20 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
        i8k.restricted  [HW] Allow controlling fans only if SYS_ADMIN
                        capability is set.
 
        i8k.restricted  [HW] Allow controlling fans only if SYS_ADMIN
                        capability is set.
 

+       i915.invert_brightness=
+                       [DRM] Invert the sense of the variable that is used to
+                       set the brightness of the panel backlight. Normally a
+                       brightness value of 0 indicates backlight switched off,
+                       and the maximum of the brightness value sets the backlight
+                       to maximum brightness. If this parameter is set to 0
+                       (default) and the machine requires it, or this parameter
+                       is set to 1, a brightness value of 0 sets the backlight
+                       to maximum brightness, and the maximum of the brightness
+                       value switches the backlight off.
+                       -1 -- never invert brightness
+                        0 -- machine default
+                        1 -- force brightness inversion
+

        icn=            [HW,ISDN]
                        Format: <io>[,<membase>[,<icn_id>[,<icn_id2>]]]
 
        icn=            [HW,ISDN]
                        Format: <io>[,<membase>[,<icn_id>[,<icn_id2>]]]
 


@@ -1425,8 +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


@@ -2333,18 +2363,100 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
        ramdisk_size=   [RAM] Sizes of RAM disks in kilobytes
                        See Documentation/blockdev/ramdisk.txt.
 
        ramdisk_size=   [RAM] Sizes of RAM disks in kilobytes
                        See Documentation/blockdev/ramdisk.txt.
 

-       rcupdate.blimit=        [KNL,BOOT]
+       rcutree.blimit= [KNL,BOOT]

                        Set maximum number of finished RCU callbacks to process
                        in one batch.
 
                        Set maximum number of finished RCU callbacks to process
                        in one batch.
 

-       rcupdate.qhimark=       [KNL,BOOT]
+       rcutree.qhimark=        [KNL,BOOT]

                        Set threshold of queued
                        RCU callbacks over which batch limiting is disabled.
 
                        Set threshold of queued
                        RCU callbacks over which batch limiting is disabled.
 

-       rcupdate.qlowmark=      [KNL,BOOT]
+       rcutree.qlowmark=       [KNL,BOOT]

                        Set threshold of queued RCU callbacks below which
                        batch limiting is re-enabled.
 
                        Set threshold of queued RCU callbacks below which
                        batch limiting is re-enabled.
 

+       rcutree.rcu_cpu_stall_suppress= [KNL,BOOT]
+                       Suppress RCU CPU stall warning messages.
+
+       rcutree.rcu_cpu_stall_timeout= [KNL,BOOT]
+                       Set timeout for RCU CPU stall warning messages.
+
+       rcutorture.fqs_duration= [KNL,BOOT]
+                       Set duration of force_quiescent_state bursts.
+
+       rcutorture.fqs_holdoff= [KNL,BOOT]
+                       Set holdoff time within force_quiescent_state bursts.
+
+       rcutorture.fqs_stutter= [KNL,BOOT]
+                       Set wait time between force_quiescent_state bursts.
+
+       rcutorture.irqreader= [KNL,BOOT]
+                       Test RCU readers from irq handlers.
+
+       rcutorture.n_barrier_cbs= [KNL,BOOT]
+                       Set callbacks/threads for rcu_barrier() testing.
+
+       rcutorture.nfakewriters= [KNL,BOOT]
+                       Set number of concurrent RCU writers.  These just
+                       stress RCU, they don't participate in the actual
+                       test, hence the "fake".
+
+       rcutorture.nreaders= [KNL,BOOT]
+                       Set number of RCU readers.
+
+       rcutorture.onoff_holdoff= [KNL,BOOT]
+                       Set time (s) after boot for CPU-hotplug testing.
+
+       rcutorture.onoff_interval= [KNL,BOOT]
+                       Set time (s) between CPU-hotplug operations, or
+                       zero to disable CPU-hotplug testing.
+
+       rcutorture.shuffle_interval= [KNL,BOOT]
+                       Set task-shuffle interval (s).  Shuffling tasks
+                       allows some CPUs to go into dyntick-idle mode
+                       during the rcutorture test.
+
+       rcutorture.shutdown_secs= [KNL,BOOT]
+                       Set time (s) after boot system shutdown.  This
+                       is useful for hands-off automated testing.
+
+       rcutorture.stall_cpu= [KNL,BOOT]
+                       Duration of CPU stall (s) to test RCU CPU stall
+                       warnings, zero to disable.
+
+       rcutorture.stall_cpu_holdoff= [KNL,BOOT]
+                       Time to wait (s) after boot before inducing stall.
+
+       rcutorture.stat_interval= [KNL,BOOT]
+                       Time (s) between statistics printk()s.
+
+       rcutorture.stutter= [KNL,BOOT]
+                       Time (s) to stutter testing, for example, specifying
+                       five seconds causes the test to run for five seconds,
+                       wait for five seconds, and so on.  This tests RCU's
+                       ability to transition abruptly to and from idle.
+
+       rcutorture.test_boost= [KNL,BOOT]
+                       Test RCU priority boosting?  0=no, 1=maybe, 2=yes.
+                       "Maybe" means test if the RCU implementation
+                       under test support RCU priority boosting.
+
+       rcutorture.test_boost_duration= [KNL,BOOT]
+                       Duration (s) of each individual boost test.
+
+       rcutorture.test_boost_interval= [KNL,BOOT]
+                       Interval (s) between each boost test.
+
+       rcutorture.test_no_idle_hz= [KNL,BOOT]
+                       Test RCU's dyntick-idle handling.  See also the
+                       rcutorture.shuffle_interval parameter.
+
+       rcutorture.torture_type= [KNL,BOOT]
+                       Specify the RCU implementation to test.
+
+       rcutorture.verbose= [KNL,BOOT]
+                       Enable additional printk() statements.
+

        rdinit=         [KNL]
                        Format: <full_path>
                        Run specified binary instead of /init from the ramdisk,
        rdinit=         [KNL]
                        Format: <full_path>
                        Run specified binary instead of /init from the ramdisk,


@@ -2375,6 +2487,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
        resume=         [SWSUSP]
                        Specify the partition device for software suspend
 
        resume=         [SWSUSP]
                        Specify the partition device for software suspend

+                       Format:
+                       {/dev/<dev> | PARTUUID=<uuid> | <int>:<int> | <hex>}

 
        resume_offset=  [SWSUSP]
                        Specify the offset from the beginning of the partition
 
        resume_offset=  [SWSUSP]
                        Specify the offset from the beginning of the partition


@@ -2429,6 +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


@@ -2850,6 +2973,22 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
        video=          [FB] Frame buffer configuration
                        See Documentation/fb/modedb.txt.
 
        video=          [FB] Frame buffer configuration
                        See Documentation/fb/modedb.txt.
 

+       virtio_mmio.device=
+                       [VMMIO] Memory mapped virtio (platform) device.
+
+                               <size>@<baseaddr>:<irq>[:<id>]
+                       where:
+                               <size>     := size (can use standard suffixes
+                                               like K, M and G)
+                               <baseaddr> := physical base address
+                               <irq>      := interrupt number (as passed to
+                                               request_irq())
+                               <id>       := (optional) platform device id
+                       example:
+                               virtio_mmio.device=1K@0x100b0000:48:7
+
+                       Can be used multiple times for multiple devices.
+

        vga=            [BOOT,X86-32] Select a particular video mode
                        See Documentation/x86/boot.txt and
                        Documentation/svga.txt.
        vga=            [BOOT,X86-32] Select a particular video mode
                        See Documentation/x86/boot.txt and
                        Documentation/svga.txt.