iscsi_tcp: propogate EAGAIN from sendpage to libiscsi

[safe/jmp/linux-2.6] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index e455938..08def8d 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -48,6 +48,7 @@ parameter is applicable:
        EFI     EFI Partitioning (GPT) is enabled
        EIDE    EIDE/ATAPI support is enabled.
        FB      The frame buffer device is enabled.
        EFI     EFI Partitioning (GPT) is enabled
        EIDE    EIDE/ATAPI support is enabled.
        FB      The frame buffer device is enabled.

+       GCOV    GCOV profiling is enabled.

        HW      Appropriate hardware is enabled.
        IA-64   IA-64 architecture is enabled.
        IMA     Integrity measurement architecture is enabled.
        HW      Appropriate hardware is enabled.
        IA-64   IA-64 architecture is enabled.
        IMA     Integrity measurement architecture is enabled.


@@ -56,7 +57,6 @@ parameter is applicable:
        ISAPNP  ISA PnP code is enabled.
        ISDN    Appropriate ISDN support is enabled.
        JOY     Appropriate joystick support is enabled.
        ISAPNP  ISA PnP code is enabled.
        ISDN    Appropriate ISDN support is enabled.
        JOY     Appropriate joystick support is enabled.

-       KMEMTRACE kmemtrace is enabled.

        LIBATA  Libata driver is enabled
        LP      Printer support is enabled.
        LOOP    Loopback device support is enabled.
        LIBATA  Libata driver is enabled
        LP      Printer support is enabled.
        LOOP    Loopback device support is enabled.


@@ -329,11 +329,6 @@ and is between 256 and 4096 characters. It is defined in the file
                                    flushed before they will be reused, which
                                    is a lot of faster
 
                                    flushed before they will be reused, which
                                    is a lot of faster
 

-       amd_iommu_size= [HW,X86-64]
-                       Define the size of the aperture for the AMD IOMMU
-                       driver. Possible values are:
-                       '32M', '64M' (default), '128M', '256M', '512M', '1G'
-

        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>


@@ -497,6 +492,13 @@ and is between 256 and 4096 characters. It is defined in the file
                        Also note the kernel might malfunction if you disable
                        some critical bits.
 
                        Also note the kernel might malfunction if you disable
                        some critical bits.
 

+       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
+                       to determine OS memory pressure for page stealing by
+                       a hypervisor.
+                       Default: yes
+

        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


@@ -545,6 +547,10 @@ and is between 256 and 4096 characters. It is defined in the file
                        console=brl,ttyS0
                For now, only VisioBraille is supported.
 
                        console=brl,ttyS0
                For now, only VisioBraille is supported.
 

+       consoleblank=   [KNL] The console blank (screen saver) timeout in
+                       seconds. Defaults to 10*60 = 10mins. A value of 0
+                       disables the blank timer.
+

        coredump_filter=
                        [KNL] Change the default value for
                        /proc/<pid>/coredump_filter.
        coredump_filter=
                        [KNL] Change the default value for
                        /proc/<pid>/coredump_filter.


@@ -646,6 +652,13 @@ and is between 256 and 4096 characters. It is defined in the file
                        DMA-API debugging code disables itself because the
                        architectural default is too low.
 
                        DMA-API debugging code disables itself because the
                        architectural default is too low.
 

+       dma_debug_driver=<driver_name>
+                       With this option the DMA-API debugging driver
+                       filter feature can be enabled at boot time. Just
+                       pass the driver to filter for as the parameter.
+                       The filter can be disabled or changed to another
+                       driver later using sysfs.
+

        dscc4.setup=    [NET]
 
        dtc3181e=       [HW,SCSI]
        dscc4.setup=    [NET]
 
        dtc3181e=       [HW,SCSI]


@@ -752,12 +765,25 @@ and is between 256 and 4096 characters. It is defined in the file
                        ia64_pal_cache_flush instead of SAL_CACHE_FLUSH.
 
        ftrace=[tracer]
                        ia64_pal_cache_flush instead of SAL_CACHE_FLUSH.
 
        ftrace=[tracer]

-                       [ftrace] will set and start the specified tracer
+                       [FTRACE] will set and start the specified tracer

                        as early as possible in order to facilitate early
                        boot debugging.
 
        ftrace_dump_on_oops
                        as early as possible in order to facilitate early
                        boot debugging.
 
        ftrace_dump_on_oops

-                       [ftrace] will dump the trace buffers on oops.
+                       [FTRACE] will dump the trace buffers on oops.
+
+       ftrace_filter=[function-list]
+                       [FTRACE] Limit the functions traced by the function
+                       tracer at boot up. function-list is a comma separated
+                       list of functions. This list can be changed at run
+                       time by the set_ftrace_filter file in the debugfs
+                       tracing directory. 
+
+       ftrace_notrace=[function-list]
+                       [FTRACE] Do not trace the functions specified in
+                       function-list. This list can be changed at run time
+                       by the set_ftrace_notrace file in the debugfs
+                       tracing directory.

 
        gamecon.map[2|3]=
                        [HW,JOY] Multisystem joystick and NES/SNES/PSX pad
 
        gamecon.map[2|3]=
                        [HW,JOY] Multisystem joystick and NES/SNES/PSX pad


@@ -771,6 +797,12 @@ and is between 256 and 4096 characters. It is defined in the file
                        Format: off | on
                        default: on
 
                        Format: off | on
                        default: on
 

+       gcov_persist=   [GCOV] When non-zero (default), profiling data for
+                       kernel modules is saved and remains accessible via
+                       debugfs, even when the module is unloaded/reloaded.
+                       When zero, profiling data is discarded and associated
+                       debugfs files are removed at module unload time.
+

        gdth=           [HW,SCSI]
                        See header of drivers/scsi/gdth.c.
 
        gdth=           [HW,SCSI]
                        See header of drivers/scsi/gdth.c.
 


@@ -873,11 +905,8 @@ and is between 256 and 4096 characters. It is defined in the file
 
        ide-core.nodma= [HW] (E)IDE subsystem
                        Format: =0.0 to prevent dma on hda, =0.1 hdb =1.0 hdc
 
        ide-core.nodma= [HW] (E)IDE subsystem
                        Format: =0.0 to prevent dma on hda, =0.1 hdb =1.0 hdc

-                       .vlb_clock .pci_clock .noflush .noprobe .nowerr .cdrom
-                       .chs .ignore_cable are additional options
-                       See Documentation/ide/ide.txt.
-
-       idebus=         [HW] (E)IDE subsystem - VLB/PCI bus speed
+                       .vlb_clock .pci_clock .noflush .nohpa .noprobe .nowerr
+                       .cdrom .chs .ignore_cable are additional options

                        See Documentation/ide/ide.txt.
 
        ide-pci-generic.all-generic-ide [HW] (E)IDE subsystem
                        See Documentation/ide/ide.txt.
 
        ide-pci-generic.all-generic-ide [HW] (E)IDE subsystem


@@ -914,6 +943,12 @@ and is between 256 and 4096 characters. It is defined in the file
                        Formt: { "sha1" | "md5" }
                        default: "sha1"
 
                        Formt: { "sha1" | "md5" }
                        default: "sha1"
 

+       ima_tcb         [IMA]
+                       Load a policy which meets the needs of the Trusted
+                       Computing Base.  This means IMA will measure all
+                       programs exec'd, files mmap'd for exec, and all files
+                       opened for read by uid=0.
+

        in2000=         [HW,SCSI]
                        See header of drivers/scsi/in2000.c.
 
        in2000=         [HW,SCSI]
                        See header of drivers/scsi/in2000.c.
 


@@ -1054,24 +1089,19 @@ and is between 256 and 4096 characters. It is defined in the file
                        use the HighMem zone if it exists, and the Normal
                        zone if it does not.
 
                        use the HighMem zone if it exists, and the Normal
                        zone if it does not.
 

-       kmemtrace.enable=       [KNL,KMEMTRACE] Format: { yes | no }
-                               Controls whether kmemtrace is enabled
-                               at boot-time.
-
-       kmemtrace.subbufs=n     [KNL,KMEMTRACE] Overrides the number of
-                       subbufs kmemtrace's relay channel has. Set this
-                       higher than default (KMEMTRACE_N_SUBBUFS in code) if
-                       you experience buffer overruns.
-

        kgdboc=         [HW] kgdb over consoles.
                        Requires a tty driver that supports console polling.
        kgdboc=         [HW] kgdb over consoles.
                        Requires a tty driver that supports console polling.

-                       (only serial suported for now)
+                       (only serial supported for now)

                        Format: <serial_device>[,baud]
 
        kmac=           [MIPS] korina ethernet MAC address.
                        Configure the RouterBoard 532 series on-chip
                        Ethernet adapter MAC address.
 
                        Format: <serial_device>[,baud]
 
        kmac=           [MIPS] korina ethernet MAC address.
                        Configure the RouterBoard 532 series on-chip
                        Ethernet adapter MAC address.
 

+       kmemleak=       [KNL] Boot-time kmemleak enable/disable
+                       Valid arguments: on, off
+                       Default: on
+

        kstack=N        [X86] Print N words from the kernel stack
                        in oops dumps.
 
        kstack=N        [X86] Print N words from the kernel stack
                        in oops dumps.
 


@@ -1390,7 +1420,7 @@ and is between 256 and 4096 characters. It is defined in the file
                        ('y', default) or cooked coordinates ('n')
 
        mtrr_chunk_size=nn[KMG] [X86]
                        ('y', default) or cooked coordinates ('n')
 
        mtrr_chunk_size=nn[KMG] [X86]

-                       used for mtrr cleanup. It is largest continous chunk
+                       used for mtrr cleanup. It is largest continuous chunk

                        that could hold holes aka. UC entries.
 
        mtrr_gran_size=nn[KMG] [X86]
                        that could hold holes aka. UC entries.
 
        mtrr_gran_size=nn[KMG] [X86]


@@ -1535,6 +1565,10 @@ and is between 256 and 4096 characters. It is defined in the file
                        register save and restore. The kernel will only save
                        legacy floating-point registers on task switch.
 
                        register save and restore. The kernel will only save
                        legacy floating-point registers on task switch.
 

+       noxsave         [BUGS=X86] Disables x86 extended register state save
+                       and restore using xsave. The kernel will fallback to
+                       enabling legacy floating-point and sse state.
+

        nohlt           [BUGS=ARM,SH] Tells the kernel that the sleep(SH) or
                        wfi(ARM) instruction doesn't work correctly and not to
                        use it. This is also useful when using JTAG debugger.
        nohlt           [BUGS=ARM,SH] Tells the kernel that the sleep(SH) or
                        wfi(ARM) instruction doesn't work correctly and not to
                        use it. This is also useful when using JTAG debugger.


@@ -1659,6 +1693,14 @@ and is between 256 and 4096 characters. It is defined in the file
        oprofile.timer= [HW]
                        Use timer interrupt instead of performance counters
 
        oprofile.timer= [HW]
                        Use timer interrupt instead of performance counters
 

+       oprofile.cpu_type=      Force an oprofile cpu type
+                       This might be useful if you have an older oprofile
+                       userland or if you want common events.
+                       Format: { archperfmon }
+                       archperfmon: [X86] Force use of architectural
+                               perfmon on Intel CPUs instead of the
+                               CPU specific event set.
+

        osst=           [HW,SCSI] SCSI Tape Driver
                        Format: <buffer_size>,<write_threshold>
                        See also Documentation/scsi/st.txt.
        osst=           [HW,SCSI] SCSI Tape Driver
                        Format: <buffer_size>,<write_threshold>
                        See also Documentation/scsi/st.txt.