ARM FCSE - random programs segfaults

[Michael Trimarchi]

Hi,

Martix wrote:
> Hi,
> I've compiled latest 2.6.29-andy-tracking kernel with ARM Fast Context
> Switch Extension patch [1], using gta02_moredrivers_defconfig kernel
> config and CONFIG_ARM_FCSE=y and CONFIG_ARM_FCSE_BEST_EFFORT=y
> options. I've tested this kernel with latest SHR-unstable. System with
> FCSE enabled is really faster. However some (mostly Python)
> applications randomly segfaults during loading[3]. But when
> application loads properly, it runs rock stable[4].
>
> Seems, it isn't related to 32 MB virtual memory limit and best effort
> mode, because applications running above this limit runs properly.
>
> I also tested FCSE on Qt Moko v16 with nodebug v17 kernel, but Qte
> always restarts when loading desktop.
>
> ARM FSCE support is already included in Android on FreeRunner
> distributon kernel. I like to see this included also in Openmoko
> distributions kernels, when will be stable and ready.
>   
I have readed your email, but I don't have time right now to take a look.
I'm going to add the original author of the patches. Maybe he can give
some hints

Michael

> Regards,
>
> Martin 'Martix' Holec
>
> [1] http://gitorious.org/android-on-freerunner/kernel_openmoko/commit/1623424a807210d761b829253c93cbc45fd74dba?diffmode=inline
> [2] http://git.openmoko.org/?p=kernel.git;a=commit;h=973a41fce60e5f6edfcf0eaf94056a57eee65e16
> [3] http://disk.unart.cz/martix@openmoko.cz/strace.log
> [4] http://disk.unart.cz/martix@openmoko.cz/strace2.log
>
>
>