diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/device-mapper/cache.txt | 11 | ||||
| -rw-r--r-- | Documentation/device-mapper/thin-provisioning.txt | 34 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/clock/renesas,cpg-mstp-clocks.txt | 4 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/net/opencores-ethoc.txt | 22 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/pinctrl/brcm,bcm11351-pinctrl.txt (renamed from Documentation/devicetree/bindings/pinctrl/brcm,capri-pinctrl.txt) | 8 | ||||
| -rw-r--r-- | Documentation/networking/can.txt | 6 | 
6 files changed, 64 insertions, 21 deletions
| diff --git a/Documentation/device-mapper/cache.txt b/Documentation/device-mapper/cache.txt index e6b72d35515..68c0f517c60 100644 --- a/Documentation/device-mapper/cache.txt +++ b/Documentation/device-mapper/cache.txt @@ -124,12 +124,11 @@ the default being 204800 sectors (or 100MB).  Updating on-disk metadata  ------------------------- -On-disk metadata is committed every time a REQ_SYNC or REQ_FUA bio is -written.  If no such requests are made then commits will occur every -second.  This means the cache behaves like a physical disk that has a -write cache (the same is true of the thin-provisioning target).  If -power is lost you may lose some recent writes.  The metadata should -always be consistent in spite of any crash. +On-disk metadata is committed every time a FLUSH or FUA bio is written. +If no such requests are made then commits will occur every second.  This +means the cache behaves like a physical disk that has a volatile write +cache.  If power is lost you may lose some recent writes.  The metadata +should always be consistent in spite of any crash.  The 'dirty' state for a cache block changes far too frequently for us  to keep updating it on the fly.  So we treat it as a hint.  In normal diff --git a/Documentation/device-mapper/thin-provisioning.txt b/Documentation/device-mapper/thin-provisioning.txt index 8a7a3d46e0d..05a27e9442b 100644 --- a/Documentation/device-mapper/thin-provisioning.txt +++ b/Documentation/device-mapper/thin-provisioning.txt @@ -116,6 +116,35 @@ Resuming a device with a new table itself triggers an event so the  userspace daemon can use this to detect a situation where a new table  already exceeds the threshold. +A low water mark for the metadata device is maintained in the kernel and +will trigger a dm event if free space on the metadata device drops below +it. + +Updating on-disk metadata +------------------------- + +On-disk metadata is committed every time a FLUSH or FUA bio is written. +If no such requests are made then commits will occur every second.  This +means the thin-provisioning target behaves like a physical disk that has +a volatile write cache.  If power is lost you may lose some recent +writes.  The metadata should always be consistent in spite of any crash. + +If data space is exhausted the pool will either error or queue IO +according to the configuration (see: error_if_no_space).  If metadata +space is exhausted or a metadata operation fails: the pool will error IO +until the pool is taken offline and repair is performed to 1) fix any +potential inconsistencies and 2) clear the flag that imposes repair. +Once the pool's metadata device is repaired it may be resized, which +will allow the pool to return to normal operation.  Note that if a pool +is flagged as needing repair, the pool's data and metadata devices +cannot be resized until repair is performed.  It should also be noted +that when the pool's metadata space is exhausted the current metadata +transaction is aborted.  Given that the pool will cache IO whose +completion may have already been acknowledged to upper IO layers +(e.g. filesystem) it is strongly suggested that consistency checks +(e.g. fsck) be performed on those layers when repair of the pool is +required. +  Thin provisioning  ----------------- @@ -258,10 +287,9 @@ ii) Status  	should register for the event and then check the target's status.      held metadata root: -	The location, in sectors, of the metadata root that has been +	The location, in blocks, of the metadata root that has been  	'held' for userspace read access.  '-' indicates there is no -	held root.  This feature is not yet implemented so '-' is -	always returned. +	held root.      discard_passdown|no_discard_passdown  	Whether or not discards are actually being passed down to the diff --git a/Documentation/devicetree/bindings/clock/renesas,cpg-mstp-clocks.txt b/Documentation/devicetree/bindings/clock/renesas,cpg-mstp-clocks.txt index a6a352c2771..5992dceec7a 100644 --- a/Documentation/devicetree/bindings/clock/renesas,cpg-mstp-clocks.txt +++ b/Documentation/devicetree/bindings/clock/renesas,cpg-mstp-clocks.txt @@ -21,9 +21,9 @@ Required Properties:      must appear in the same order as the output clocks.    - #clock-cells: Must be 1    - clock-output-names: The name of the clocks as free-form strings -  - renesas,indices: Indices of the gate clocks into the group (0 to 31) +  - renesas,clock-indices: Indices of the gate clocks into the group (0 to 31) -The clocks, clock-output-names and renesas,indices properties contain one +The clocks, clock-output-names and renesas,clock-indices properties contain one  entry per gate clock. The MSTP groups are sparsely populated. Unimplemented  gate clocks must not be declared. diff --git a/Documentation/devicetree/bindings/net/opencores-ethoc.txt b/Documentation/devicetree/bindings/net/opencores-ethoc.txt new file mode 100644 index 00000000000..2dc127c30d9 --- /dev/null +++ b/Documentation/devicetree/bindings/net/opencores-ethoc.txt @@ -0,0 +1,22 @@ +* OpenCores MAC 10/100 Mbps + +Required properties: +- compatible: Should be "opencores,ethoc". +- reg: two memory regions (address and length), +  first region is for the device registers and descriptor rings, +  second is for the device packet memory. +- interrupts: interrupt for the device. + +Optional properties: +- clocks: phandle to refer to the clk used as per +  Documentation/devicetree/bindings/clock/clock-bindings.txt + +Examples: + +	enet0: ethoc@fd030000 { +		compatible = "opencores,ethoc"; +		reg = <0xfd030000 0x4000 0xfd800000 0x4000>; +		interrupts = <1>; +		local-mac-address = [00 50 c2 13 6f 00]; +		clocks = <&osc>; +        }; diff --git a/Documentation/devicetree/bindings/pinctrl/brcm,capri-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/brcm,bcm11351-pinctrl.txt index 9e9e9ef9f85..c119debe6ba 100644 --- a/Documentation/devicetree/bindings/pinctrl/brcm,capri-pinctrl.txt +++ b/Documentation/devicetree/bindings/pinctrl/brcm,bcm11351-pinctrl.txt @@ -1,4 +1,4 @@ -Broadcom Capri Pin Controller +Broadcom BCM281xx Pin Controller  This is a pin controller for the Broadcom BCM281xx SoC family, which includes  BCM11130, BCM11140, BCM11351, BCM28145, and BCM28155 SoCs. @@ -7,14 +7,14 @@ BCM11130, BCM11140, BCM11351, BCM28145, and BCM28155 SoCs.  Required Properties: -- compatible:	Must be "brcm,capri-pinctrl". +- compatible:	Must be "brcm,bcm11351-pinctrl"  - reg:		Base address of the PAD Controller register block and the size  		of the block.  For example, the following is the bare minimum node:  	pinctrl@35004800 { -		compatible = "brcm,capri-pinctrl"; +		compatible = "brcm,bcm11351-pinctrl";  		reg = <0x35004800 0x430>;  	}; @@ -119,7 +119,7 @@ Optional Properties (for HDMI pins):  Example:  // pin controller node  pinctrl@35004800 { -	compatible = "brcm,capri-pinctrl"; +	compatible = "brcmbcm11351-pinctrl";  	reg = <0x35004800 0x430>;  	// pin configuration node diff --git a/Documentation/networking/can.txt b/Documentation/networking/can.txt index f3089d42351..0cbe6ec22d6 100644 --- a/Documentation/networking/can.txt +++ b/Documentation/networking/can.txt @@ -554,12 +554,6 @@ solution for a couple of reasons:    not specified in the struct can_frame and therefore it is only valid in    CANFD_MTU sized CAN FD frames. -  As long as the payload length is <=8 the received CAN frames from CAN FD -  capable CAN devices can be received and read by legacy sockets too. When -  user-generated CAN FD frames have a payload length <=8 these can be send -  by legacy CAN network interfaces too. Sending CAN FD frames with payload -  length > 8 to a legacy CAN network interface returns an -EMSGSIZE error. -    Implementation hint for new CAN applications:    To build a CAN FD aware application use struct canfd_frame as basic CAN | 
