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    SubjectRe: [PATCH -mm] remove swap token code
    (4/10/12 9:48 PM), Johannes Weiner wrote:
    > On Mon, Apr 09, 2012 at 11:32:01AM -0400, Rik van Riel wrote:
    >> The swap token code no longer fits in with the current VM model.
    >> It does not play well with cgroups or the better NUMA placement
    >> code in development, since we have only one swap token globally.
    >> It also has the potential to mess with scalability of the system,
    >> by increasing the number of non-reclaimable pages on the active
    >> and inactive anon LRU lists.
    >> Last but not least, the swap token code has been broken for a
    >> year without complaints. This suggests we no longer have much
    >> use for it.
    >> The days of sub-1G memory systems with heavy use of swap are
    >> over. If we ever need thrashing reducing code in the future,
    >> we will have to implement something that does scale.
    >> Signed-off-by: Rik van Riel<>
    > Acked-by: Johannes Weiner<>

    Acked-by: KOSAKI Motohiro <>

    I really think swap token is sane. but now (after merging Johannes's memcg naturalization)
    it don't work and we don't have a reason to maintain _current_ implementaion.

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      Last update: 2012-04-11 20:13    [W:0.020 / U:13.108 seconds]
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