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    SubjectRe: [PATCH -v10 0/4] Lock-less list
    On Thu, 20 Jan 2011 08:45:58 +0800
    Huang Ying <> wrote:

    > On Thu, 2011-01-20 at 05:55 +0800, Andrew Morton wrote:
    > > I'm trying to remember why we're talking about this.
    > >
    > > You had an ACPI-based "hardware error reporting" thing. And that
    > > required an nmi-context memory allocator. And that required a
    > > "lockless" list implementation.
    > >
    > > Yes?
    > Yes. But the "lockless" list implementation is general, it can be used
    > by other part of kernel too, such as irq_work and xlist in
    > net/rds/xlist.h in the patchset.

    Well. Lots of things are general but that doesn't mean we toss them
    into the kernel when we already have plenty of infrastructure to handle
    that sort of thing.

    otoh, hoisting xlist.h out of net/rds and making it generally available
    is a good thing.

    otooh, net/rds/ probably didn't need xlist at all and could have used
    existing general code.

    So... I'd say that unless and until the NMI-context allocator is
    merged, the case for merging the lockless list code is a bit marginal?
    Or have you identified other code sites which could use llist and which
    would gain some benefit from migrating?

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