5.4.210 velinux

Documentation/ABI/testing/sysfs-ata

@@ -107,13 +107,14 @@ Description:
 				described in ATA8 7.16 and 7.17. Only valid if
 				the device is not a PM.
 
-		pio_mode:	(RO) Transfer modes supported by the device when
-				in PIO mode. Mostly used by PATA device.
+		pio_mode:	(RO) PIO transfer mode used by the device.
+				Mostly used by PATA devices.
 
-		xfer_mode:	(RO) Current transfer mode
+		xfer_mode:	(RO) Current transfer mode. Mostly used by
+				PATA devices.
 
-		dma_mode:	(RO) Transfer modes supported by the device when
-				in DMA mode. Mostly used by PATA device.
+		dma_mode:	(RO) DMA transfer mode used by the device.
+				Mostly used by PATA devices.
 
 		class:		(RO) Device class. Can be "ata" for disk,
 				"atapi" for packet device, "pmp" for PM, or

Documentation/ABI/testing/sysfs-bus-iio-vf610

@@ -1,4 +1,4 @@
-What:		/sys/bus/iio/devices/iio:deviceX/conversion_mode
+What:		/sys/bus/iio/devices/iio:deviceX/in_conversion_mode
 KernelVersion:	4.2
 Contact:	linux-iio@vger.kernel.org
 Description:

Documentation/ABI/testing/sysfs-devices-system-cpu

@@ -495,6 +495,7 @@ What:		/sys/devices/system/cpu/vulnerabilities
 		/sys/devices/system/cpu/vulnerabilities/srbds
 		/sys/devices/system/cpu/vulnerabilities/tsx_async_abort
 		/sys/devices/system/cpu/vulnerabilities/itlb_multihit
+		/sys/devices/system/cpu/vulnerabilities/mmio_stale_data
 Date:		January 2018
 Contact:	Linux kernel mailing list <linux-kernel@vger.kernel.org>
 Description:	Information about CPU vulnerabilities

Documentation/PCI/pci-error-recovery.rst

@@ -79,19 +79,19 @@ This structure has the form::
 
 	struct pci_error_handlers
 	{
-		int (*error_detected)(struct pci_dev *dev, enum pci_channel_state);
+		int (*error_detected)(struct pci_dev *dev, pci_channel_state_t);
 		int (*mmio_enabled)(struct pci_dev *dev);
 		int (*slot_reset)(struct pci_dev *dev);
 		void (*resume)(struct pci_dev *dev);
 	};
 
 The possible channel states are::
 
-	enum pci_channel_state {
+	typedef enum {
 		pci_channel_io_normal,  /* I/O channel is in normal state */
 		pci_channel_io_frozen,  /* I/O to channel is blocked */
 		pci_channel_io_perm_failure, /* PCI card is dead */
-	};
+	} pci_channel_state_t;
 
 Possible return values are::
 
@@ -348,7 +348,7 @@ STEP 6: Permanent Failure
 -------------------------
 A "permanent failure" has occurred, and the platform cannot recover
 the device.  The platform will call error_detected() with a
-pci_channel_state value of pci_channel_io_perm_failure.
+pci_channel_state_t value of pci_channel_io_perm_failure.
 
 The device driver should, at this point, assume the worst. It should
 cancel all pending I/O, refuse all new I/O, returning -EIO to

Documentation/accounting/psi.rst

@@ -35,11 +35,7 @@ Pressure interface
 Pressure information for each resource is exported through the
 respective file in /proc/pressure/ -- cpu, memory, and io.
 
-The format for CPU is as such::
-
-	some avg10=0.00 avg60=0.00 avg300=0.00 total=0
-
-and for memory and IO::
+The format is as such::
 
 	some avg10=0.00 avg60=0.00 avg300=0.00 total=0
 	full avg10=0.00 avg60=0.00 avg300=0.00 total=0
@@ -56,6 +52,9 @@ situation from a state where some tasks are stalled but the CPU is
 still doing productive work. As such, time spent in this subset of the
 stall state is tracked separately and exported in the "full" averages.
 
+CPU full is undefined at the system level, but has been reported
+since 5.13, so it is set to zero for backward compatibility.
+
 The ratios (in %) are tracked as recent trends over ten, sixty, and
 three hundred second windows, which gives insight into short term events
 as well as medium and long term trends. The total absolute stall time
@@ -90,7 +89,8 @@ Triggers can be set on more than one psi metric and more than one trigger
 for the same psi metric can be specified. However for each trigger a separate
 file descriptor is required to be able to poll it separately from others,
 therefore for each trigger a separate open() syscall should be made even
-when opening the same psi interface file.
+when opening the same psi interface file. Write operations to a file descriptor
+with an already existing psi trigger will fail with EBUSY.
 
 Monitors activate only when system enters stall state for the monitored
 psi metric and deactivates upon exit from the stall state. While system is

Documentation/admin-guide/cgroup-v2.rst

@@ -986,6 +986,8 @@ All time durations are in microseconds.
 	- nr_periods
 	- nr_throttled
 	- throttled_usec
+	- nr_bursts
+	- burst_usec
 
   cpu.weight
 	A read-write single value file which exists on non-root
@@ -1017,6 +1019,12 @@ All time durations are in microseconds.
 	$PERIOD duration.  "max" for $MAX indicates no limit.  If only
 	one number is written, $MAX is updated.
 
+  cpu.max.burst
+	A read-write single value file which exists on non-root
+	cgroups.  The default is "0".
+
+	The burst in the range [0, $MAX].
+
   cpu.pressure
 	A read-only nested-key file which exists on non-root cgroups.
 
@@ -1174,6 +1182,27 @@ PAGE_SIZE multiple when read back.
         It will broke low boundary. Because it tries to reclaim the
         memory many times, until the memory drops to a certain level.
 
+  memory.reclaim
+	A write-only nested-keyed file which exists for all cgroups.
+
+	This is a simple interface to trigger memory reclaim in the
+	target cgroup.
+
+	This file accepts a single key, the number of bytes to reclaim.
+	No nested keys are currently supported.
+
+	Example::
+
+	  echo "1G" > memory.reclaim
+
+	The interface can be later extended with nested keys to
+	configure the reclaim behavior. For example, specify the
+	type of memory to reclaim from (anon, file, ..).
+
+	Please note that the kernel can over or under reclaim from
+	the target cgroup. If less bytes are reclaimed than the
+	specified amount, -EAGAIN is returned.
+
   memory.oom.group
 	A read-write single value file which exists on non-root
 	cgroups.  The default value is "0".
@@ -1344,8 +1373,19 @@ PAGE_SIZE multiple when read back.
 
 		Amount of reclaimed pages
 
-	  pgactivate(npn)
+	  pgscan_kswapd (npn)
+		Amount of scanned pages by kswapd (in an inactive LRU list)
+
+	  pgscan_direct (npn)
+		Amount of scanned pages directly  (in an inactive LRU list)
 
+	  pgsteal_kswapd (npn)
+		Amount of reclaimed pages by kswapd
+
+	  pgsteal_direct (npn)
+		Amount of reclaimed pages directly
+
+	  pgactivate(npn)
 		Amount of pages moved to the active LRU list
 
 	  pgdeactivate(npn)
@@ -1496,8 +1536,7 @@ IO Interface Files
 ~~~~~~~~~~~~~~~~~~
 
   io.stat
-	A read-only nested-keyed file which exists on non-root
-	cgroups.
+	A read-only nested-keyed file.
 
 	Lines are keyed by $MAJ:$MIN device numbers and not ordered.
 	The following nested keys are defined.

Documentation/admin-guide/devices.txt

@@ -3002,10 +3002,10 @@
 		65 = /dev/infiniband/issm1     Second InfiniBand IsSM device
 		  ...
 		127 = /dev/infiniband/issm63    63rd InfiniBand IsSM device
-		128 = /dev/infiniband/uverbs0   First InfiniBand verbs device
-		129 = /dev/infiniband/uverbs1   Second InfiniBand verbs device
+		192 = /dev/infiniband/uverbs0   First InfiniBand verbs device
+		193 = /dev/infiniband/uverbs1   Second InfiniBand verbs device
 		  ...
-		159 = /dev/infiniband/uverbs31  31st InfiniBand verbs device
+		223 = /dev/infiniband/uverbs31  31st InfiniBand verbs device
 
  232 char	Biometric Devices
 		0 = /dev/biometric/sensor0/fingerprint	first fingerprint sensor on first device

Documentation/admin-guide/hw-vuln/index.rst

@@ -15,3 +15,4 @@ are configurable at compile, boot or run time.
    tsx_async_abort
    multihit.rst
    special-register-buffer-data-sampling.rst
+   processor_mmio_stale_data.rst