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    SubjectRe: nfsd, v4: oops in find_acceptable_alias, ppc32 Linux, post-2.6.27-rc1
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    On Tue, 2008-08-05 at 21:43 +1200, Paul Collins wrote:
    > Michael Ellerman <michael@ellerman.id.au> writes:
    >
    > > I see you have FTRACE enabled. That's new and could potentially bugger
    > > things up without the compiler knowing, so can you turn that off.
    >
    > With FTRACE disabled, doing cross-builds from the 2.6.26 amd64 client, a
    > setup that normally triggers the problem on the 2nd or 3rd build, I was
    > able to do 10 complete builds. ("make clean oldconfig vmlinux modules")
    >
    > So it looks like ftrace is the cause, or at least provokes some other
    > usually-latent problem. I wasn't using it, so I'll just leave it off.

    OK, that's sort of good, but also not. I can't see anything in the
    ftrace code that explains it, but I guess it's lurking. We'll try and
    reproduce locally and bang on it.

    Thanks for chasing it, and let us know if you get an oops with
    CONFIG_FTRACE=n.

    > > And can you enable CONFIG_CODE_PATCHING_SELFTEST and
    > > CONFIG_FTR_FIXUP_SELFTEST, that will enable tests of some code I changed
    > > that /could/ (maybe) cause random blow ups.
    >
    > With those options enabled, I get this:
    >
    > Running code patching self-tests ...
    > Running feature fixup self-tests ...

    That's good, they only print if they fail.

    cheers

    --
    Michael Ellerman
    OzLabs, IBM Australia Development Lab

    wwweb: http://michael.ellerman.id.au
    phone: +61 2 6212 1183 (tie line 70 21183)

    We do not inherit the earth from our ancestors,
    we borrow it from our children. - S.M.A.R.T Person
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