On Mon, Sep 14, 2015 at 4:01 PM, Vlastimil Babka <vbabka@xxxxxxx> wrote: > > On 09/14/2015 03:49 PM, Vitaly Wool wrote: >> >> While using ZRAM on a small RAM footprint devices, together with >> KSM, >> I ran into several occasions when moving pages from compressed swap back >> into the "normal" part of RAM caused significant latencies in system > > > I'm sure Minchan will want to hear the details of that :) > >> operation. By using zbud I lose in compression ratio but gain in >> determinism, lower latencies and lower fragmentation, so in the coming > > > I doubt the "lower fragmentation" part given what I've read about the design of zbud and zsmalloc? As it turns out, I see more cases of compaction kicking in and significantly more compact_stalls with zsmalloc. ~vitaly -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>