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    SubjectRe: aio stress panic on 2.6.11-mm1

    Any sense of how costly it is to use spin_lock_irq's vs spin_lock
    (across different architectures) ? Isn't rwsem used very widely ?


    On Wed, Mar 09, 2005 at 10:33:58AM +0000, David Howells wrote:
    > Andrew Morton <> wrote:
    > > If we want to take the spinlock from interrupt context, the non-interrupt
    > > context code needs to do spin_lock_irq(), not spin_lock().
    > Yeah. I think I had a patch for that somewhere, but I think Linus turned it
    > down. I can't find any emails on that subject though. I'll knock together a
    > new patch for it.
    > David
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    Suparna Bhattacharya (
    Linux Technology Center
    IBM Software Lab, India

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