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    SubjectRe: [PATCH 0/3] allow zram to use zbud as underlying allocator
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    On Mon, Sep 14, 2015 at 4:01 PM, Vlastimil Babka <vbabka@suse.cz> 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


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