Ubuntu
systemd package

  1. Bug #1234743
  2. Comment #23

Comment 23 for bug 1234743

Revision history for this message
Dimitri John Ledkov (xnox) wrote : Re: [Bug 1234743] Re: omapfb module floods system with udev events on samsung galaxy nexus

On 10 October 2013 14:37, Dmitrijs Ledkovs <email address hidden> wrote:
> On 10 October 2013 14:15, Colin King <email address hidden> wrote:
>> I believe the library /vendor/lib/hw/hwcomposer.omap4.so depends on
>> these VSYNCs, I'm unsure how the plumbing works between the kernel and
>> this library - is this proprietary code?
>>
>> The kernel just shoves these VSYNC uevents outs for the
>> hwcompiser.omap4.so to handle. I am of the current understanding that it
>> is not used by anything else.
>>
>
> Proprietary or not it's source code is here:
>
> https://android.googlesource.com/platform/hardware/ti/omap4-aah/+/master/hwc/hwc.c
>
> Or at least appears to be and/or similarish.

Which appears to be getting a FD to "kernel" event source, via socket created by
https://android.googlesource.com/platform/hardware/libhardware_legacy/+/android-4.3_r3/uevent/uevent.c

so if we filter those VSYNC events on the "udev" source, systemd-udev
& upstart & et al user space shouldn't be spammed with those and the
driver will still work.

Regards,

Dmitrijs.