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    SubjectRe: Memory leak in 2.4.27 kernel, using mmap raw packet sockets
    On Tue, 30 Nov 2004 05:16:56 +0100
    Andrea Arcangeli <andrea@suse.de> wrote:

    > On Mon, Nov 29, 2004 at 08:03:31PM -0800, David S. Miller wrote:
    > >
    > > These changes have made 2.4.29-BK stop booting on sparc64.
    > > I'll get more information to find out exactly why.
    >
    > hmm strange, I would suggest to put a dump_stack here to see where it
    > triggers:
    >
    > if (!pages[i] || PageReserved(pages[i])) {
    > if (pages[i] != ZERO_PAGE(start)) {
    > + dump_stack()
    > savevma = vma;
    > goto bad_page;
    > }
    >
    > } else
    >
    > The only thing I see that's probably missing for sparc is a
    > flush_dcache_page page_cache_get, but that wouldn't prevent booting,
    > it'd only corrupt userland as worse (and it was missing from the
    > previous code too ;).

    It's happening very early on, when we boot the second processor,
    which means that something wrt. forking the first kernel thread
    is perhaps being messed up.

    I can't see how get_user_pages() could be involved there, so like I
    said I'll try to get some more info.
    -
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