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    SubjectRe: [PATCH] __free_pages_ok oops
    > and Gerd Knorr's report (extracts below) implies that his bttv driver
    > was calling unmap_kiobuf at interrupt time. Is that right, Gerd?


    > encourage him to unmap at interrupt time). Now maybe Gerd's code is
    > wrong anyway: a quick look suggests it may also vfree there, which
    > would be wrong at interrupt time.

    vfree() isn't allowed? I know vmalloc() isn't because it might sleep
    while waiting for the VM getting a few free pages. Why vfree isn't
    allowed? I can't see why freeing ressources is a problem ...

    Is somewhere a list of things which are allowed from irq context and
    which are not?


    #define ENOCLUE 125 /* userland programmer induced race condition */
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