mm: compaction: compact normal zone

Compact normal zone when system run into early suspend.

There isn't need to compact other zones since there isn't
big memory block needs in those zones on our platform.

This is ported from the following patch:

 * (CR) compact normal zone only in early suspend
   Reviewed-on: http://gerrit.pcs.mot.com/494963

Change-Id: If81d1d440a365bd54a6bd6d23ef851493280692c
Signed-off-by: Yi-wei Zhao <gbjc64@motorola.com>
Reviewed-on: http://gerrit.pcs.mot.com/507168
Tested-by: Jira Key <JIRAKEY@motorola.com>
Reviewed-by: Jason Hrycay <jason.hrycay@motorola.com>
(cherry picked from commit a8cb0d740ddbe26511f280b958d6c6b41e7bb7e2)

Signed-off-by: Luis Cruz <ljc2491@gmail.com>
compact all zones on earlysuspend

mm: compaction: add Android-specific hook.

On larger memory configurations the bulk of memory is in the high
zone and in the 3.4 Android kernels ION and KGSL attempt to make
large allocations. So it's no longer enough to compact just normal
zone. That simplifies things by removing the need for some code.
The suitability of compaction per zone is checked implicitly, so we
will only do anything "expensive" when there's a good reason. Given
that the screen is off at that time, user won't notice anything.
This takes about 150ms on 2GB configuration with MSM8960pro CPU.

Also the code added previously to install earlysuspend handler
was not properly checking for CONFIG_HAS_EARLYSUSPEND, which means
Android-specific code has been stuffed into generic kernel code.
Fix that too, while we're at it.

Change-Id: Icd7b5ec3a304d47611602bdac3e2aad6f4faf8c1
Signed-off-by: Igor Kovalenko <cik009@motorola.com>
Reviewed-on: http://gerrit.pcs.mot.com/522737
Tested-by: Jira Key <jirakey@motorola.com>
Reviewed-by: Klocwork kwcheck <klocwork-kwcheck@sourceforge.mot.com>
Submit-Approved: Jira Key <jirakey@motorola.com>
(cherry picked from commit 88cdf7ab16589afff4f72226980541e15816c8f4)

Signed-off-by: Luis Cruz <ljc2491@gmail.com>
mm: compaction: do suspend compaction in workqueue

Move compact_nodes_suspend out of the direct early suspend workqueue
to avoid long delays in the suspend path on a heavily loaded system;
examples being heavily use of filesystem contending with the pages
that are trying to be compacted.

Signed-off-by: Yuan Jiangli <jlyuan@motorola.com>
Reviewed-on: http://gerrit.pcs.mot.com/535748
SLT-Approved: Slta Waiver <sltawvr@motorola.com>
Tested-by: Jira Key <jirakey@motorola.com>
Reviewed-by: Christopher Fries <qcf001@motorola.com>
Reviewed-by: Igor Kovalenko <cik009@motorola.com>
Reviewed-by: Klocwork kwcheck <klocwork-kwcheck@sourceforge.mot.com>
Submit-Approved: Jira Key <jirakey@motorola.com>
Reviewed-by: Check Patch <CHEKPACH@motorola.com>

(cherry-pick from commit  6e202c2572708430f682987b2240eae50dadb1e3)

Change-Id: Ifcf8e0ff8f60d3c7f099d95653a43ba9651eeb28
Reviewed-on: http://gerrit.pcs.mot.com/540977
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: Luis Cruz <ljc2491@gmail.com>
mm: page_alloc: retry direct compaction

When system load is heavy, memory commpaction may encounter
transient failure; add retry mechanism. And add the following
statistic variable "compact_retry_success" in /proc/vmstat
to see how many compaction success due to the retry.

And __zone_watermark_ok() will easily return false when system
is busy, which will make compaction failure as well. Amend some
to save margin cases.

This patch is ported from the patch:
 * (CR) mem compaction enhancement
   Reviewed-on: http://gerrit.pcs.mot.com/494962

Change-Id: I049a29542926d94f78c723278a711bbf6a87b4a1
Signed-off-by: Yi-wei Zhao <gbjc64@motorola.com>

Conflicts:

	mm/page_alloc.c

Signed-off-by: Luis Cruz <ljc2491@gmail.com>
msm: bam_dmux: UL inactivity timeout is too high

Reduce UL_TIMEOUT from 1000 ms to 200 ms to improve current drain
for idle use case.

Change-Id: I83eba12e28506735ff15f52533dda653872fc9f2
Signed-off-by: Alexander Filonenko <vtp684@motorola.com>
Reviewed-on: http://gerrit.pcs.mot.com/538334
Tested-by: Jira Key <jirakey@motorola.com>
Reviewed-by: Connie Zhao <czhao1@motorola.com>
Reviewed-by: Check Patch <CHEKPACH@motorola.com>
Reviewed-by: Klocwork kwcheck <klocwork-kwcheck@sourceforge.mot.com>
Submit-Approved: Jira Key <jirakey@motorola.com>
Reviewed-by: Igor Kovalenko <cik009@motorola.com>
Reviewed-by: Christopher Fries <c.fries@motorola.com>
SLT-Approved: Christopher Fries <c.fries@motorola.com>
Signed-off-by: Luis Cruz <ljc2491@gmail.com>
Delay UL powerdown if BAM is in polling mode

Change-Id: I982c669863390d5ea828d8dd3158e76dab3163e9
Reviewed-on: http://gerrit.pcs.mot.com/548359
Tested-by: Jira Key <jirakey@motorola.com>
Reviewed-by: Igor Kovalenko <cik009@motorola.com>
Reviewed-by: Klocwork kwcheck <klocwork-kwcheck@sourceforge.mot.com>
Reviewed-by: Alexander Filonenko <alexf@motorola.com>
SLT-Approved: Christopher Fries <c.fries@motorola.com>
Submit-Approved: Jira Key <jirakey@motorola.com>
Signed-off-by: Luis Cruz <ljc2491@gmail.com>
msm: bam_dmux: optimize UL inactivity timeout

Increase UL_TIMEOUT_DELAY to 300 ms to avoid most of powerdown attempts while
in polling mode.

Change-Id: Ibbcf641caac492357f78c1d6fd378609ea546c67
Signed-off-by: Alexander Filonenko <vtp684@motorola.com>
Reviewed-on: http://gerrit.pcs.mot.com/548732
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: Igor Kovalenko <cik009@motorola.com>
SLT-Approved: Christopher Fries <c.fries@motorola.com>
Submit-Approved: Jira Key <jirakey@motorola.com>
Signed-off-by: Luis Cruz <ljc2491@gmail.com>
msm: bam_dmux: fix compilation issue
Change-Id: Ie4dd92ce622a1e59bd415b0d8ba25c1896b20fab
Signed-off-by: Jeffrey Carlyle <jeff.carlyle@motorola.com>
[ljc: also call BUG instead of panic]
Signed-off-by: Luis Cruz <ljc2491@gmail.com>
msm: bam_dmux: Use power efficient workqueues for delayed timeouts
There is no need to use a normal per-CPU workqueue for delayed power downs
as they're not timing or performance critical and waking up a core for them
would defeat some of the point.

Signed-off-by: Luis Cruz <ljc2491@gmail.com>