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    SubjectRe: [BUG] SLOB breaks Crypto
    Geert Uytterhoeven wrote:
    > On Fri, Mar 19, 2010 at 02:33, Herbert Xu <> wrote:
    >> On Thu, Mar 18, 2010 at 10:24:41PM +0100, wrote:
    >>> Pekka Enberg schrieb:
    >>>> Even with CONFIG_DEBUG_SLAB enabled or with CONFIG_SLUB and
    >>> no, these options have not been / are not enabled.
    >> Can you please try it with those options enabled? That will tell
    >> us if there is some latent bug in the crypto layer that only shows
    >> up right away under SLOB.
    > After seeing a posting from Nemoto-san on the linux-mips list (should
    > show up soon on
    > I'm wondering if these defaults are the culprit;
    > mm/slab.c:#define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long long)
    > mm/slob.c:#define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long)
    > mm/slub.c:#define ARCH_KMALLOC_MINALIGN __alignof__(unsigned long long)

    Just a quick note: I changed this line in mm/slob.c to (unsigned long
    long) and was able to load tcrypt without the kernel oopsing or
    panic'ing. When running all test via

    modprobe tcrypt

    the tests seem to pass fine judging by /proc/crypto. Nevertheless module
    insertion fails (as expected) but does not return EAGAIN but EMULTIHOP


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