On Tue, May 07, 2019 at 09:04:30AM +0200, Greg Kroah-Hartman wrote: > Um, why can't "all" Android devices take the same patches that the Pixel > phones are using today? They should all be in the public android-common > kernel repositories that all Android devices should be syncing with on a > weekly/monthly basis anyway, right? > > thanks, > > greg k-h
Hi Greg, I only see PSI present in the android-common kernels for 4.9 and above. The vast majority of Android devices do not run a 4.9+ kernel. It seems unreasonable to expect OEMs to toil with backporting PSI themselves to get decent memory management. But even if they did backport PSI, it wouldn't help too much because a PSI-enabled LMKD solution is not ready yet. It looks like a PSI-based LMKD is still under heavy development and won't be ready for all Android devices for quite some time. Additionally, it looks like the supposedly-dead lowmemorykiller.c is still being actively tweaked by Google [1], which does not instill confidence that a definitive LMK solution a la PSI is coming any time soon. Thanks, Sultan [1] https://android.googlesource.com/kernel/common/+/152bacdd85c46f0c76b00c4acc253e414513634c
