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    SubjectRe: [RFC][PATCH 0/10] I/O context inheritance
    On Tue, Apr 22 2008, Hirokazu Takahashi wrote:
    > Hi,
    >
    > Sorry, these patches are for linux-2.6.25.
    >
    > > This series of patches make the block I/O layer and the I/O schedulers
    > > be able to determine the right io_context of every I/O.
    > >
    > > The current implementation of the block I/O layer and the I/O schedulers
    > > assume that the current process is the one which issued the given I/O,
    > > then use the io_context of this process to control the I/O.
    > > But this assumption isn't quite right because several kernel threads
    > > will handle I/O requests on behalf of the processes which originated them.
    > > This often happens when you want to use device mapper modules.
    > >
    > > The patches make every bio has a pointer to an io_context, which will
    > > be set when it is allocated or cloned. So it makes it possible to find
    > > the right io_context from any bio at any place.
    > >
    > > I'm waiting for your comments.

    Can you give a brief summary of what you need this stuff for?

    --
    Jens Axboe



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