Bumberry Pi

Nexus 5 big-bum kernel V23

I know I said I won't post about this anymore, but everybody lies.
From V20 we have new interesting things that are worth mentioning in a special blog post.
I kind of changed the base of the kernel. It's still franco-ish, but with a little cherry-picking from there and a little from here, and from there also.

I will try to make a complete list of features enabled and active in this kernel:

min default CPU freq: 300MHz
max default CPU freq: 2.26GHz
overclock possibility up to 3.01GHz, with the following freq steps: 2.4GHz, 2.72GHz, 2.80GHz, 2.88GHz
CPU under/overvolting possibility
default CPU governor: blu_active (the same one which Code Blue kernel uses)
available CPU governors: ondemand, interactive (the one from franco's original work) and performance
hotplug: blu_plug (the same one which Code Blue kernel uses). I've changed from mako_hotplug to this one.
hotplug special tunables: powersave mode, min/max CPUs online, max CPUs online when screen is off, max freq when screen is off
I/O readahead size: 512KB
I/O default schedueler: BFQ v7r5
available I/O scheduelers: noop, deadline, row, cfq, zen
dynamic fsync. When screen is on, file syncing is disabled. Once you turn off the screen, sync will be enabled
GPU min/max 200/450MHz
GPU default governor: interactive
GPU available governors: ondemand, performance
color profiles. Based on franco, works with FKU or Nexus Display Control app.
franco sound
high performance mode sound driver, enabled by default
various memory improvements. This doesn't mean less consumed RAM, also free RAM is wasted RAM for linux. Also, read this: http://www.linuxatemyram.com/
fast charge from faux123. This enables a custom mode where you can input your maximum input amperage, from 500mAh to 2000mAh, with the following steps: 500mAh, 900mAh, 1200mAh, 1500mAh, 2000mAh. I don't recommend setting anything more than 1200mAh.
KSM: Kernel Samepage Merging.

KSM merges memory pages from one app with another app, thus only loading one memory page, not two pages that are the same.

Let's say that app A has the page X loaded in memory. Let's say that app B loads pages X and Y in memory. KSM detects that and points app B to the memory address from page X loaded by app A. In the end we have this:

Without KSM:
A: X
B: X, Y
Total: X, X, Y

With KSM:
A: X
B: ^, Y
Total: X, Y
the famous I2C @ 19.2MHz
HTCP as default TCP congestion control. (I personally don't see any differences between different TCP Congestion Control algorithms)
other TCPCC available: reno, bic, cubic (I used this in DD-WRT), westwood (they say it's good for wireless/3G/4G devices), highspeed, hybla, vegas, veno, scalable, lp, yeah, illinois. (I will get rid of 90% of this, since I'm 100% sure that 99% of the Internet users don't even know what these are.) (https://github.com/StefanescuCristian/hammerhead/commit/2c8947b6403074d6c272a1b01076d55e2dd08ac1)
compilled with latest Linaro GCC (4.9.2)
I probably forgot somethings

There are comments.

Bumberry Pi

Other articles

Nexus5 kernel v11

Nexus 5 kernel v2

Changelog:

Nexus 5 kernel

Other articles

Changelog:

blogroll

social