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    SubjectRe: [PATCH 4/4] irq: move move_irq_desc calling to set_affinity directly -v4

    This patch and the existing code in Linus's git is wrong.

    In mainline:

    static void ack_apic_edge(unsigned int irq)
    struct irq_desc *desc = irq_to_desc(irq);



    static void irq_complete_move(struct irq_desc **descp)
    *descp = desc = move_irq_desc(desc, me);

    So, we end up modifying the stack pointer in the stack frame of
    ack_apic_edge() but not really achieving the actual irq desc migration.

    hmm.. We should be seeing crashes/memory leaks etc when this code is
    turned on with the appropriate config options (apart from the code not
    achieving its actual intentions).

    As far as I can see, this patch also has the same issue.
    Please fix both mainline and this patch.

    And also, please see below:

    On Tue, 2009-04-14 at 13:44 -0700, Yinghai Lu wrote:
    > Impact: fix panic
    > so could move_masked_irq call move_irq_desc directly.
    > also we still don't support IRQ_MOVE_PCNTXT aka intr_remapped path

    As you added the original bits and also modifying these bits now, it
    will be good if you can post a patch for this too. And if you can't test
    particular paths, please copy the interested folks and get an ack from
    their test results, before pushing the patch to upstream.


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      Last update: 2009-04-15 00:07    [W:0.043 / U:17.240 seconds]
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