Android: memcg v1 - v2
summary
Upgrade effort moves Android memcg from v1 to v2 to add real dma-buf accounting using a per-CPU counter that flushes to global totals, plus kernel-initiated proactive reclaim for backgrounded apps and working-set protection for foreground latency. Testing on kernels 5.10 vs 6.1 finds many fixes: reclaim slowdowns from 2,000 zombies (vs ~400–500 active cgroups), a big unexplained slab increase, and performance wins that reduce jank once patches are applied.
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