#
# README for usbip-utils
#
# Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
#               2005-2008 Takahiro Hirofuchi


[Requirements]
    - USB/IP device drivers
	Found in the staging directory of the Linux kernel.

    - libudev >= 2.0
	libudev library

    - libwrap0-dev
	tcp wrapper library

    - gcc >= 4.0

    - libtool, automake >= 1.9, autoconf >= 2.5.0, pkg-config

[Optional]
    - hwdata
        Contains USB device identification data.


[Install]
    0. Generate configuration scripts.
	$ ./autogen.sh

    1. Compile & install the userspace utilities.
	$ ./configure [--with-tcp-wrappers=no] [--with-usbids-dir=<dir>]
	$ make install

    2. Compile & install USB/IP drivers.


[Usage]
    server:# (Physically attach your USB device.)

    server:# insmod usbip-core.ko
    server:# insmod usbip-host.ko

    server:# usbipd -D
	- Start usbip daemon.

    server:# usbip list -l
	- List driver assignments for USB devices.

    server:# usbip bind --busid 1-2
	- Bind usbip-host.ko to the device with busid 1-2.
	- The USB device 1-2 is now exportable to other hosts!
	- Use `usbip unbind --busid 1-2' to stop exporting the device.

    client:# insmod usbip-core.ko
    client:# insmod vhci-hcd.ko

    client:# usbip list --remote <host>
	- List exported USB devices on the <host>.

    client:# usbip attach --remote <host> --busid 1-2
	- Connect the remote USB device.

    client:# usbip port
	- Show virtual port status.

    client:# usbip detach --port <port>
	- Detach the USB device.


[Example]
---------------------------
	SERVER SIDE
---------------------------
Physically attach your USB devices to this host.

    trois:# insmod path/to/usbip-core.ko
    trois:# insmod path/to/usbip-host.ko
    trois:# usbipd -D

In another terminal, let's look up what USB devices are physically
attached to this host.

    trois:# usbip list -l
    Local USB devices
    =================
     - busid 1-1 (05a9:a511)
	     1-1:1.0 -> ov511

     - busid 3-2 (0711:0902)
	     3-2:1.0 -> none

     - busid 3-3.1 (08bb:2702)
	     3-3.1:1.0 -> snd-usb-audio
	     3-3.1:1.1 -> snd-usb-audio

     - busid 3-3.2 (04bb:0206)
	     3-3.2:1.0 -> usb-storage

     - busid 3-3 (0409:0058)
	     3-3:1.0 -> hub

     - busid 4-1 (046d:08b2)
	     4-1:1.0 -> none
	     4-1:1.1 -> none
	     4-1:1.2 -> none

     - busid 5-2 (058f:9254)
	     5-2:1.0 -> hub

A USB storage device of busid 3-3.2 is now bound to the usb-storage
driver. To export this device, we first mark the device as
"exportable"; the device is bound to the usbip-host driver. Please
remember you can not export a USB hub.

Mark the device of busid 3-3.2 as exportable:

    trois:# usbip --debug bind --busid 3-3.2
    ...
    usbip debug: usbip_bind.c:162:[unbind_other] 3-3.2:1.0 -> usb-storage
    ...
    bind device on busid 3-3.2: complete

    trois:# usbip list -l
    Local USB devices
    =================
    ...

     - busid 3-3.2 (04bb:0206)
	     3-3.2:1.0 -> usbip-host
    ...

---------------------------
	CLIENT SIDE
---------------------------
First, let's list available remote devices that are marked as
exportable on the host.

    deux:# insmod path/to/usbip-core.ko
    deux:# insmod path/to/vhci-hcd.ko

    deux:# usbip list --remote 10.0.0.3
    Exportable USB devices
    ======================
     - 10.0.0.3
	    1-1: Prolific Technology, Inc. : unknown product (067b:3507)
	       : /sys/devices/pci0000:00/0000:00:1f.2/usb1/1-1
	       : (Defined at Interface level) / unknown subclass / unknown protocol (00/00/00)
	       :  0 - Mass Storage / SCSI / Bulk (Zip) (08/06/50)

	1-2.2.1: Apple Computer, Inc. : unknown product (05ac:0203)
	       : /sys/devices/pci0000:00/0000:00:1f.2/usb1/1-2/1-2.2/1-2.2.1
	       : (Defined at Interface level) / unknown subclass / unknown protocol (00/00/00)
	       :  0 - Human Interface Devices / Boot Interface Subclass / Keyboard (03/01/01)

	1-2.2.3: OmniVision Technologies, Inc. : OV511+ WebCam (05a9:a511)
	       : /sys/devices/pci0000:00/0000:00:1f.2/usb1/1-2/1-2.2/1-2.2.3
	       : (Defined at Interface level) / unknown subclass / unknown protocol (00/00/00)
	       :  0 - Vendor Specific Class / unknown subclass / unknown protocol (ff/00/00)

	    3-1: Logitech, Inc. : QuickCam Pro 4000 (046d:08b2)
	       : /sys/devices/pci0000:00/0000:00:1e.0/0000:02:0a.0/usb3/3-1
	       : (Defined at Interface level) / unknown subclass / unknown protocol (00/00/00)
	       :  0 - Data / unknown subclass / unknown protocol (0a/ff/00)
	       :  1 - Audio / Control Device / unknown protocol (01/01/00)
	       :  2 - Audio / Streaming / unknown protocol (01/02/00)

Attach a remote USB device:

    deux:# usbip attach --remote 10.0.0.3 --busid 1-1
    port 0 attached

Show the devices attached to this client:

    deux:# usbip port
    Port 00: <Port in Use> at Full Speed(12Mbps)
	   Prolific Technology, Inc. : unknown product (067b:3507)
	   6-1 -> usbip://10.0.0.3:3240/1-1  (remote bus/dev 001/004)
	   6-1:1.0 used by usb-storage
			  /sys/class/scsi_device/0:0:0:0/device
			  /sys/class/scsi_host/host0/device
			  /sys/block/sda/device

Detach the imported device:

    deux:# usbip detach --port 0
    port 0 detached


[Checklist]
    - See 'Debug Tips' on the project wiki.
	- http://usbip.wiki.sourceforge.net/how-to-debug-usbip
    - usbip-host.ko must be bound to the target device.
	- See /proc/bus/usb/devices and find "Driver=..." lines of the device.
    - Shutdown firewall.
	- usbip now uses TCP port 3240.
    - Disable SELinux.
    - Check the kernel and daemon messages.


[Contact]
    Mailing List: linux-usb@vger.kernel.org
ef='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>370efda701f03cccf21e02bb1fdd3b852547d75c</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/sched/sch_blackhole.c?h=nds-private-remove&amp;id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>net/sched/sch_blackhole.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sched/sch_blackhole.c?h=nds-private-remove&amp;id=0c744ea4f77d72b3dcebb7a8f2684633ec79be88'>0c744ea4f77d72b3dcebb7a8f2684633ec79be88</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/sched/sch_blackhole.c?h=nds-private-remove&amp;id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7&amp;id2=0c744ea4f77d72b3dcebb7a8f2684633ec79be88'>diff</a>)</td></tr></table>
<div class='commit-subject'>tracing: Fix hwlat kthread migration</div><div class='commit-msg'>The hwlat tracer creates a kernel thread at start of the tracer. It is
pinned to a single CPU and will move to the next CPU after each period of
running. If the user modifies the migration thread's affinity, it will not
change after that happens.

The original code created the thread at the first instance it was called,
but later was changed to destroy the thread after the tracer was finished,
and would not be created until the next instance of the tracer was
established. The code that initialized the affinity was only called on the
initial instantiation of the tracer. After that, it was not initialized, and
the previous affinity did not match the current newly created one, making
it appear that the user modified the thread's affinity when it did not, and
the thread failed to migrate again.

Cc: stable@vger.kernel.org
Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs")
Signed-off-by: Steven Rostedt (VMware) &lt;rostedt@goodmis.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>Diffstat</a> (limited to 'net/sched/sch_blackhole.c')</div><table summary='diffstat' class='diffstat'>