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    SubjectRe: [patch 2/2] x86, fpu: lazy allocation of FPU area - v3
    Pavel Machek wrote:
    > On Thu 2008-03-06 16:51:41, Ingo Molnar wrote:
    >> * Pavel Machek <pavel@ucw.cz> wrote:
    >>
    >>>>> kmem_cache_alloc() can fail (return NULL) and not handling it is a
    >>>>> bug.
    >>>> oops. you are correct. Will send a sigsegv in the failure case then.
    >>>> Thanks.
    >>> You are introducing possibility of hard to debug error, where previous
    >>> code just worked... Does not look like good idea to me.
    >> hm, how does it differ from any other allocation failure? We could fail
    >
    > Well, we should not be sending SIGSEGV...? SIGBUS would be cleaner, or
    > SIGKILL... what happens when userland tries to catch this one?
    >

    I'm confused...

    Normally when we need memory for userspace and can't get it, we put the
    process to sleep until memory is available.

    Why is this different in any way?

    -hpa


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