OOM in Camera

[rinigus]

OOM can be triggered by:

• start few apps and browser
• start camera (Jolla's stock)
• shoot video, stay in camera after its done
• switch to camera photo mode, no pictures needed to be taken
• in camera, swipe to left to get to shot video
• watch video
• go back to camera

When you get back to the camera, other processes will be killed in the background by low memory killer.

That will not happen, if after watching video, you'll get to desktop and close camera app.

[rinigus]

looks like disabling CONFIG_ANDROID_LOW_MEMORY_KILLER in kernel gets rid of it

[rinigus]

however, disabling it leads to simple way of rebooting device - tested using

perl -wE 'my @xs; for (1..2**20) { push @xs, q{a} x 2**20 }; say scalar @xs;'

So, if wishing to use classical oom killer, we will need to set its options correctly as well

[rinigus]

Same script froze Android lowmemorykiller. Maybe a touch too aggressive

[rinigus]

Not in AOSP10/aarch64