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    SubjectRe: [PATCH 9/9] block: make blk-throttle preserve the issuing task on delayed bios
    Hello,

    On Fri, Feb 17, 2012 at 04:58:14PM -0500, Vivek Goyal wrote:
    > blk-throttle is just one of places where we lose submitter's context info.
    > There are others too.

    Yeah, sure. We do that in quite a few places now.

    > As Kent said, doing this at more generic level will probably make sense.
    > I think dm layer also might benefit from it. We had issues with losing
    > this process context info while bio is being submitted with a helper thread.
    >
    > https://lkml.org/lkml/2010/10/24/59
    >
    > But I guess this will require some changes at dm layer too so that it
    > takes extra bio->ioc and bio->blkcg references at cloning time.

    Yeah, it just needs to make sure %current's ioc is there and call
    bio_associate_current() before passing bios to worker. We'll get
    there.

    Thanks.

    --
    tejun


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