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    SubjectRe: [PATCH v4 09/17] mm: workingset: use xas_set_lru() to pass shadow_nodes
    On Tue, Dec 14, 2021 at 10:09 PM Johannes Weiner <> wrote:
    > On Tue, Dec 14, 2021 at 12:53:34AM +0800, Muchun Song wrote:
    > > The workingset will add the xa_node to shadow_nodes, so we should use
    > > xas_set_lru() to pass the list_lru which we want to insert xa_node
    > > into to set up the xa_node reclaim context correctly.
    > >
    > > Signed-off-by: Muchun Song <>
    > Ah, you can't instantiate the list on-demand in list_lru_add() because
    > that's happening in an atomic context. So you need the lru available
    > in the broader xa update context and group the lru setup in with the
    > other pre-atomic node allocation bits. Fair enough. I think it would
    > be a bit easier to read if this patch and the previous one were
    > squashed (workingset is the only user of xa_lru anyway) and you added
    > that explanation. But other than that, the changes make sense to me;
    > to a combined patch, please add:

    Great. I'll do it. Thanks for your review.

    > Acked-by: Johannes Weiner <>

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