Difference between revisions of "Application:SBromwichKernel"
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The sbromwich series of kernels are my kernels with all current webos-internals testing patches applied, plus my own patches. | The sbromwich series of kernels are my kernels with all current webos-internals testing patches applied, plus my own patches. | ||
| + | |||
| + | = Patches applied for 1.4.1-24 = | ||
| + | |||
| + | * Reduce number of scheduling calls made to try to reduce battery drain. | ||
= Patches applied for 1.4.1-23 = | = Patches applied for 1.4.1-23 = | ||
| − | * Debug settings removed from default kernel build | + | * Debug settings removed from default kernel build. |
| − | * Compile kernel with explicit cortex-a8 tuning flags for gcc | + | * Compile kernel with explicit cortex-a8 tuning flags for gcc. |
| − | * Tweak prcm power manager to more explicitly wait for power set calls to return, remove debug cruft, and add Wait For Interrupt instruction if a prcm setting attempt fails | + | * Tweak prcm power manager to more explicitly wait for power set calls to return, remove debug cruft, and add Wait For Interrupt instruction if a prcm setting attempt fails. |
| − | * Enable preempt kernel | + | * Enable preempt kernel. |
= Known problems = | = Known problems = | ||
Revision as of 02:03, 9 May 2010
The sbromwich series of kernels are my kernels with all current webos-internals testing patches applied, plus my own patches.
Patches applied for 1.4.1-24
- Reduce number of scheduling calls made to try to reduce battery drain.
Patches applied for 1.4.1-23
- Debug settings removed from default kernel build.
- Compile kernel with explicit cortex-a8 tuning flags for gcc.
- Tweak prcm power manager to more explicitly wait for power set calls to return, remove debug cruft, and add Wait For Interrupt instruction if a prcm setting attempt fails.
- Enable preempt kernel.
Known problems
- Pre can take some extra time to respond to certain activities, especially when waking up; lags of up to 2 seconds can be experienced on wakeup. The alternative is a reboot, which will take even longer.
Improvements
- User interactivity latency should be lower (time to respond to keypresses, etc).
- Fewer powerd wakeups allowing the system to sleep longer.
Warnings
- My patch makes the kernel boot at 800MHz. Run this kernel at your own risk. Not compliant with point 6 of http://forums.precentral.net/webos-internals/241355-next-generation-kernel-development-packaging.html .
- anticipatory io scheduler recommended.
- Install SmartReflex patches at your own risk. SmartReflex is not expected to work.
- Some users have reported increased battery usage when running this kernel.