staging: android: lmk: Kill protected apps if size exceeds than 100 MB

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
staging: android: lowmemorykiller: select a new task to kill

Under certain circumstances, a process may take time to handle a SIGKILL.
When lowmemkiller is called again shortly after, it would pick the same
process to kill over and over, so that we cann't get free memory for long time.

Solution is to check fatal_signal_pending() on the selected task, and if it's
already pending, select a new task to kill.

Signed-off-by: Tianshui Shi <kfp634@motorola.com>
Tested-by: Jira Key <JIRAKEY@motorola.com>
Reviewed-by: Yi-Wei Zhao <gbjc64@motorola.com>
Reviewed-by: Jason Hrycay <jason.hrycay@motorola.com>
Reviewed-by: Jeffrey Carlyle <jeff.carlyle@motorola.com>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
trace: memkill: trace LMK and OOM kills

How to enable tracer:

  # mount -t debugfs nodev /sys/kernel/debug
  # echo 1 > /sys/kernel/debug/tracing/tracing_on
  # echo 1 > /sys/kernel/debug/tracing/events/memkill/enable
  # cat /sys/kernel/debug/tracing/trace

Event format:

  oom_kill: <pid> <comm> <total_vm> <anon_rss> <file_rss> <oom_score_adj> <order> <points> <cached> <freeswap>
  oom_kill_shared: <pid> <comm>
  lmk_kill: <pid> <comm> <selected_oom_adj> <selected_tasksize> <min_adj> <cached> <freeswap>

[neo: Modified to use oom_adj as short]

Signed-off-by: Jeffrey Carlyle <jeff.carlyle@motorola.com>
Reviewed-by: Jason Hrycay <jason.hrycay@motorola.com>
Reviewed-by: Klocwork kwcheck <klocwork-kwcheck@sourceforge.mot.com>
Reviewed-by: Thirumarai Selvi S <a16462@motorola.com>
Reviewed-by: Check Patch <CHEKPACH@motorola.com>
Reviewed-by: Christopher Fries <qcf001@motorola.com>
Submit-Approved: Jira Key <jirakey@motorola.com>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
trace: allow memkill tracing to be selectively enabled

Signed-off-by: Jeffrey Carlyle <jeff.carlyle@motorola.com>
Tested-by: Jira Key <jirakey@motorola.com>
Reviewed-by: Klocwork kwcheck <klocwork-kwcheck@sourceforge.mot.com>
Reviewed-by: Thirumarai Selvi S <a16462@motorola.com>
Reviewed-by: Check Patch <CHEKPACH@motorola.com>
Submit-Approved: Jira Key <jirakey@motorola.com>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
trace: memkill: Rectify format for min_adj

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
trace: memkill: per-zone page state for LMK

LMK considers memory status per zone. This change appends
gfp mask and per-zone free/file page state to LMK kill tracing.
A field <Node_id>:<Zone_id>:<Nr_free>:<Nr_page> is printed for
each zone.

Signed-off-by: Yuanyuan Zhong <a6510c@motorola.com>
Signed-off-by: Jeffrey Carlyle <jeff.carlyle@motorola.com>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
trace: memkill: provide fixed zone info columns.

Maintain kernel trace log to always have fixed number of columns.

propagated_from: (CR)

Signed-off-by: Yi-wei Zhao <gbjc64@motorola.com>
Reviewed-on: http://gerrit.pcs.mot.com/537078
SLT-Approved: Slta Waiver <sltawvr@motorola.com>
Tested-by: Jira Key <jirakey@motorola.com>
Reviewed-by: David Ding <dding@motorola.com>
Reviewed-by: Dong-Dong Yang <gdb746@motorola.com>
Reviewed-by: Jeff Thompson <jthomps1@motorola.com>
Reviewed-by: Klocwork kwcheck <klocwork-kwcheck@sourceforge.mot.com>
Reviewed-by: Check Patch <CHEKPACH@motorola.com>
Submit-Approved: Jira Key <jirakey@motorola.com>

SLT-Approved: Slta Waiver <sltawvr@motorola.com>
Tested-by: Jira Key <jirakey@motorola.com>
Reviewed-by: Klocwork kwcheck <klocwork-kwcheck@sourceforge.mot.com>
Reviewed-by: Check Patch <CHEKPACH@motorola.com>
Reviewed-by: Jason Hrycay <jason.hrycay@motorola.com>
Submit-Approved: Jira Key <jirakey@motorola.com>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
staging: android: lowmemorykiller: implement task's adj rbtree

Based on the current LMK implementation, LMK has to scan all processes to
select the correct task to kill during low memory.
The basic idea for the optimization is to :
queue all tasks with oom_score_adj priority, and then LMK just selects the
proper task from the queue(rbtree) to kill.

performance improvement:
the current implementation: average time to find a task to kill : 1004us
the optimized implementation: average time to find a task to kill: 43us

Signed-off-by: Hong-Mei Li <a21834@motorola.com>
SLT-Approved: Slta Waiver <sltawvr@motorola.com>
Tested-by: Jira Key <jirakey@motorola.com>
Reviewed-by: Yi-Wei Zhao <gbjc64@motorola.com>
Submit-Approved: Jira Key <jirakey@motorola.com>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
staging: android: lmk: check free memory when tasks switch to background

Add more free-memory check point.
This patch trigger low memory killer to scan free memory when a process is moved
to background task groups.

Signed-off-by: Hong-Mei Li <a21834@motorola.com>
Reviewed-on: http://gerrit.pcs.mot.com/557973
Tested-by: Jira Key <jirakey@motorola.com>
Reviewed-by: Yi-Wei Zhao <gbjc64@motorola.com>
SLTApproved: Yi-Wei Zhao <gbjc64@motorola.com>
Submit-Approved: Jira Key <jirakey@motorola.com>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
staging: android: lmk: skip if killed by lmk

A task can be selected to kill when it's already exiting. Sending
signal to the task at that state won't set TIF_SIGPENDING for it.
After that, every task including threads in the exiting task itself
running into lmk will compete for the mutex, then spend some time
waiting for the exiting task to release memory or try to send signal
to the same task again.
We want the exiting task to exit as early as possible but it's slowed
down greatly by the mutex and waiting. Skip lmk if current thread
group leader is exiting and is killed by lmk. Also delegate TIF_MEMDIE
to current task.

Signed-off-by: Yuanyuan Zhong <zyy@motorola.com>
SLTApproved: Slta Waiver <sltawvr@motorola.com>
Tested-by: Jira Key <jirakey@motorola.com>
Reviewed-by: Check Patch <CHEKPACH@motorola.com>
Reviewed-by: Klocwork kwcheck <klocwork-kwcheck@sourceforge.mot.com>
Reviewed-by: Russell Knize <rknize@motorola.com>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
staging: android: lmk: check TIF directly

When trying to fix that lmk can't kill an exiting task
((CR) staging: android: lmk: skip if killed by lmk),
additional check was added for the TIF_MEMDIE flag.
However the task lock has already been taken when examining
the task. The same helper function which tries to grab the
task lock again will be deadlocked.
Change to check the thread flag of thread group leader directly.

Signed-off-by: Yuanyuan Zhong <zyy@motorola.com>
Reviewed-on: http://gerrit.pcs.mot.com/587751
SLTApproved: Slta Waiver <sltawvr@motorola.com>
Tested-by: Jira Key <jirakey@motorola.com>
Reviewed-by: Yi-Wei Zhao <gbjc64@motorola.com>
Submit-Approved: Jira Key <jirakey@motorola.com>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
mm/huge_memory: use new hashtable implementation

Switch hugemem to use the new hashtable implementation. This reduces the amount of
generic unrelated code in the hugemem.

This also removes the dymanic allocation of the hash table. The size of the table is
constant so there's no point in paying the price of an extra dereference when accessing
it.

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
net/neighbour: queue work on power efficient wq

Workqueue used in neighbour layer have no real dependency of scheduling these on
the cpu which scheduled them.

On a idle system, it is observed that an idle cpu wakes up many times just to
service this work. It would be better if we can schedule it on a cpu which the
scheduler believes to be the most appropriate one.

This patch replaces normal workqueues with power efficient versions. This
doesn't change existing behavior of code unless CONFIG_WQ_POWER_EFFICIENT is
enabled.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
ASoC: msm: Use 16K sample rate for RFECNS

To enable record with an RFECNS device use a 16K
sample rate.

Signed-off-by: Ben Romberger <bromberg@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
fastcharge: New enhancements

* Add 1800 mA level
* Add "fake_charge_ac" hack. If fast charge is on with fake_charge_ac = 1,
  device will show current source as AC instead of USB.
* By default, fake_charge_ac is disabled.

Sincere thanks to mankindtw@xda for idea.

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
mdss: ppp: Add support for MDP_Y_CBCR_H2V2_VENUS format

Currently support to handle MDP_Y_CBCR_H2V2_VENUS format is
not present in driver. Adding the same.

Signed-off-by: Radhika Ranjan Soni <rrsoni@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
msm: mdss: Fix possible buffer overflow in ppp

Correct the limit check for the buffer format and avoid the
possible buffer overflow.

Signed-off-by: Shivaraj Shetty <shivaraj@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
mdss: ppp: Add support for MDP_BGRX_8888 in mdp3 ppp

Support for MDP_BGRX_8888 is required, so we are adding it in.

Signed-off-by: Terence Hampson <thampson@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
mdss: ppp: Fix ppp parse error out sequence

Put was called on fence twice, second time with a NULL pointer,
which was causing a crash.

Signed-off-by: Terence Hampson <thampson@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
mdss: ppp: free ppp bw when not in use for some time

For every request ppp was toggling on and off bw and clock.
This behavior was not for ideal bw driver and would also increase
the total time to process ppp request. Now ppp request for bw and
keeps it until there has been no additional requests for over
50ms.

Signed-off-by: Terence Hampson <thampson@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>