linux-toradex.git/Documentation, branch tegra-10.11.7

Merge branch 'linux-tegra-2.6.36' into android-tegra-2.6.36

2011-01-08T01:20:53+00:00

Conflicts:
	arch/arm/mm/cache-v6.S

Change-Id: I1a2063218dd705a762a40f4a9dfe504ce1a1d491

watchdog: Improve initialisation error message and documentation

2011-01-07T21:58:43+00:00

commit 551423748a4eba55f2eb0fc250d757986471f187 upstream.

The error message 'NMI watchdog failed to create perf event...'
does not make it clear that this is a fatal error for the
watchdog.  It also currently prints the error value as a
pointer, rather than extracting the error code with PTR_ERR().
Fix that.

Add a note to the description of the 'nowatchdog' kernel
parameter to associate it with this message.

Reported-by: Cesare Leonardi 
Signed-off-by: Ben Hutchings 
Cc: 599368@bugs.debian.org
Cc: 608138@bugs.debian.org
Cc: Don Zickus 
Cc: Frederic Weisbecker 
LKML-Reference: <1294009362.3167.126.camel@localhost>
Signed-off-by: Ingo Molnar 
Signed-off-by: Greg Kroah-Hartman

PM / Runtime: Fix pm_runtime_suspended()

2011-01-07T21:58:32+00:00

commit f08f5a0add20834d3f3d876dfe08005a5df656db upstream.

There are some situations (e.g. in __pm_generic_call()), where
pm_runtime_suspended() is used to decide whether or not to execute
a device's (system) ->suspend() callback.  The callback is not
executed if pm_runtime_suspended() returns true, but it does so
for devices that don't even support runtime PM, because the
power.disable_depth device field is ignored by it.  This leads to
problems (i.e. devices are not suspened when they should), so rework
pm_runtime_suspended() so that it returns false if the device's
power.disable_depth field is different from zero.

Signed-off-by: Rafael J. Wysocki 
Signed-off-by: Greg Kroah-Hartman

cpufreq: interactive: New 'interactive' governor

2010-12-01T23:10:04+00:00

This governor is designed for latency-sensitive workloads, such as
interactive user interfaces.  The interactive governor aims to be
significantly more responsive to ramp CPU quickly up when CPU-intensive
activity begins.

Existing governors sample CPU load at a particular rate, typically
every X ms.  This can lead to under-powering UI threads for the period of
time during which the user begins interacting with a previously-idle system
until the next sample period happens.

The 'interactive' governor uses a different approach. Instead of sampling
the CPU at a specified rate, the governor will check whether to scale the
CPU frequency up soon after coming out of idle.  When the CPU comes out of
idle, a timer is configured to fire within 1-2 ticks.  If the CPU is very
busy from exiting idle to when the timer fires then we assume the CPU is
underpowered and ramp to MAX speed.

If the CPU was not sufficiently busy to immediately ramp to MAX speed, then
the governor evaluates the CPU load since the last speed adjustment,
choosing the highest value between that longer-term load or the short-term
load since idle exit to determine the CPU speed to ramp to.

A realtime thread is used for scaling up, giving the remaining tasks the
CPU performance benefit, unlike existing governors which are more likely to
schedule rampup work to occur after your performance starved tasks have
completed.

The tuneables for this governor are:
/sys/devices/system/cpu/cpufreq/interactive/min_sample_time:
	The minimum amount of time to spend at the current frequency before
	ramping down. This is to ensure that the governor has seen enough
	historic CPU load data to determine the appropriate workload.
	Default is 80000 uS.
/sys/devices/system/cpu/cpufreq/interactive/go_maxspeed_load
	The CPU load at which to ramp to max speed.  Default is 85.

Change-Id: Ib2b362607c62f7c56d35f44a9ef3280f98c17585
Signed-off-by: Mike Chan 
Signed-off-by: Todd Poynor 
Bug: 3152864

Merge commit 'v2.6.36' into android-2.6.36

2010-10-21T22:00:17+00:00

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

2010-10-09T19:06:26+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (27 commits)
  net: clear heap allocation for ETHTOOL_GRXCLSRLALL
  isdn: strcpy() => strlcpy()
  Revert "mac80211: use netif_receive_skb in ieee80211_tx_status callpath"
  mac80211: delete AddBA response timer
  ath9k_hw: fix regression in ANI listen time calculation
  caif: fix two caif_connect() bugs
  bonding: fix WARN_ON when writing to bond_master sysfs file
  skge: add quirk to limit DMA
  MAINTAINERS: update Intel LAN Ethernet info
  e1000e.txt: Add e1000e documentation
  e1000.txt: Update e1000 documentation
  ixgbevf.txt: Update ixgbevf documentation
  cls_u32: signedness bug
  Bluetooth: Disallow to change L2CAP_OPTIONS values when connected
  sctp: Fix out-of-bounds reading in sctp_asoc_get_hmac()
  sctp: prevent reading out-of-bounds memory
  ipv4: correct IGMP behavior on v3 query during v2-compatibility mode
  netdev: Depend on INET before selecting INET_LRO
  Revert "ipv4: Make INET_LRO a bool instead of tristate."
  net: Fix the condition passed to sk_wait_event()
  ...

page-types.c: fix name of unpoison interface

2010-10-07T07:41:24+00:00

The page-types utility still uses an out of date name for the
unpoison interface: debugfs:hwpoison/renew-pfn
This patch renames and fixes it.

Signed-off-by: Naoya Horiguchi 
Acked-by: Wu Fengguang 
Signed-off-by: Andi Kleen

Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6

2010-10-07T02:11:17+00:00

e1000e.txt: Add e1000e documentation

2010-10-05T20:28:07+00:00

Adds documentation for the e1000e networking driver.

Signed-off-by: Jeff Kirsher 
Signed-off-by: David S. Miller

e1000.txt: Update e1000 documentation

2010-10-05T20:27:31+00:00

Updated the e1000 networking driver documentation.

Signed-off-by: Jeff Kirsher 
Signed-off-by: David S. Miller