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    SubjectRe: [PATCH] add vmalloc stats to meminfo
    >> Some workloads like to eat up a lot of vmalloc space.
    > Which workloads are those?
    >> It is often hard to tell
    >> whether this is because the area is too small, or just too fragmented. This
    >> makes it easy to determine.
    > I do not recall ever having seen any bug/problem reports which this patch
    > would have helped to solve. Could you explain in more detai why is it useful?

    Seen on specweb - doubling the size of the vmalloc space made it go
    away, but without any counters, it was all really just guesswork.

    I am also going to implement per-node slabcache on top of vmalloc,
    as slabs have to be in permanently mapped KVA, but all ZONE_NORMAL
    is on node 0. That's going to put a lot of pressure on the vmalloc


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