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    SubjectRe: Oops with DCACHE_WORD_ACCESS and ocfs2, autofs4
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    From: "H. Peter Anvin" <hpa@zytor.com>
    Date: Wed, 02 May 2012 23:38:51 -0700

    > On 05/02/2012 10:57 PM, Linus Torvalds wrote:
    >>
    >> There are multiple ways to fix this, including just marking that
    >> unaligned word access as being able to take an exception, but I had
    >> hoped to avoid having to do that. There are alternatives, like always
    >> padding allocations up by 7 bytes, but those are nasty too. So I'd
    >> like to understand what triggers this for Jana, it's possible we can
    >> just work around that particular issue.
    >>
    >
    > Can we do the trick of aligning the pointer and ignoring the start?
    > That would allow even architectures that don't have unaligned accesses
    > to work, too.

    Doing that would flub the hash computation.


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