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    SubjectRe: [PATCH v2 0/2] Fix nouveau-related freezes
    On Wed, Nov 10, 2010 at 6:04 PM, Andy Lutomirski <luto@mit.edu> wrote:
    > Nouveau takes down my system quite reliably when any hotplug event occurs.
    > The bug happens because the IRQ handler didn't acknowledge the hotplug
    > state until the bottom half, so the card generated a new interrupt
    > immediately, starving the bottom half and permanently starving that CPU
    > (and hence the bottom half).
    >
    > Even with this fix, a lot of the IRQ code looks rather broken.
    >
    > This is tested on 2.6.36 (and makes the system stable for me), but it also
    > applies cleanly to 2.6.37 (untested, but surely also necessary).  Fedora 14's
    > 2.6.35 kernels seem to have to same problem for me, so I suspect that 2.6.35
    > needs this fix as well.  (All of my tests are on an NV50 card.)
    >
    > Changes from v1:
    >  - Ignore unrequested hotplug bits (I accidentally removed that part).
    >  - Support newer hardware (untested -- Ben, can you check this?)

    Just a quick ping: is this making its way to Linus (and stable)? I've
    been running it for five days through (literally, due to monitor bugs)
    thousands of plug/unplug cycles with no ill effects.

    (Can we *please* get rid of, or at least ratelimit, the
    plugged/unplugged printk? It's taking over my logs, and I'm almost
    certain that it's not a driver bug.)

    --Andy
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