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SubjectRe: [parisc-linux] Re: Problems with kernel mmap (failing tst-mmap-eofsync in glibc on parisc)
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On Fri, 2003-08-22 at 13:31, David S. Miller wrote:
> 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.

Hmm, but if it does that then the glibc bug test should show up on sparc
because the i_mmap_shared list is empty if we only do MAP_SHARED of read
only files.

James


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