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    SubjectRe: [patch] IDE problems on SMP, fixed? (fwd)

    On Wed, 29 Jul 1998, Linus Torvalds wrote:

    > [ Btw, I added code to the big kernel lock that checks that the lock is
    > always aquired with interrupts enabled (locally or globally). I've run a
    > kernel that would panic if interrupts were ever disabled upon trying to
    > access the global kernel lock, and it's been up so far, under both heavy
    > load and me trying to find some other way to crash it. [...]

    the case i occasionally saw was i think the first lock_kernel() done in
    non-boot CPUs. (this was fixed) But i think the original reason was
    because lock_kernel() _itself_ used to disable interrupts (just like a
    spin_lock_irq()). But now it's lean and mean.

    -- mingo

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