Hi Robin, > > I remember there were some issues around 4.2 with the revision of the arm64 > atomic implementations affecting the cmpxchg_double() in SLUB, but those > should all be fixed (and the symptoms tended to be considerably more fatal). > A stronger candidate would be 97303480753e (which landed in 4.4), which has > various knock-on effects on the layout of SLUB internals - does fiddling > with L1_CACHE_SHIFT make any difference? >
I'll check the commits, thanks. I forgot to add L1_CACHE_SHIFT was my first suspect - I had spent a long time debugging network controller, which stopped working because of this change - L1_CACHE_BYTES (and hence NET_SKB_PAD) not fitting HW constraints. Anyway reverting it didn't help at all for page alloc issue. Best regards, Marcin
