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    SubjectRe: [parisc-linux] Re: Problems with kernel mmap (failing tst-mmap-eofsync in glibc on parisc)
    On Fri, 22 Aug 2003 19:34:41 +0100 (BST)
    Hugh Dickins <hugh@veritas.com> wrote:

    > And to me. If VM_SHARED is set, then __vma_link_file puts the vma on
    > on i_mmap_shared. If VM_SHARED is not set, it puts the vma on i_mmap.
    > flush_dcache_page treats i_mmap_shared and i_mmap lists equally.

    But file system page cache writes only call flush_dache_page()
    if the page has a non-empty i_mmap_shared list.

    > Might the problem be in parisc's __flush_dcache_page,
    > which only examines i_mmap_shared?

    No, it examines both lists, the problem is not there.

    The issue seems to be some confusion about whether the
    test program in question is actually mmap()'ing the area
    with PROT_WRITE set, and if so why the test case isn't
    passing because in such a case the page will have a non-empty
    i_mmap_shared list.
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