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    SubjectRe: exit_mmap
    Actually I was talking about 2.4.19 but I saw that this was solved in
    2.5,
    sorry for the disturbance

    Stephane wrote:
    >
    > I have a question about mmap and the close operation of a
    > vm_area_struct.
    > Is there a reason why in exit_mmap, when a process dies unexpectedly,
    > the vm_ops->close is called before zap_page_range is called?
    >
    > The problem is that if you have allocated one or several kernel pages
    > for a vm_area_struct, you can not free them in the vm_ops->close
    > operation since the count field of the pages is not 0 because they are
    > still mapped. The count will be cleared when zap_page_range is called.
    >
    > This means that exit_mmap calls vm_ops->close and zap_page_range in the
    > reverse order of a normal execution of the process, that is when the
    > process unmap the area before dying.
    >
    > It would be more deterministic and simple if vm_ops->close was always
    > called when all the pages of the area was unmapped.
    >
    > PS: please can you CC'ed the answer to stephane.tessier@netinsight.se
    > --
    > Stephane Tessier
    > Net Insight AB stephane.tessier@netinsight.se
    > Västberga Allé 9 http://www.netinsight.se
    > SE-126 30 Hägersten phone:+46-8-685 04 60
    > Sweden fax: +46-8-685 04 20

    --
    Stephane Tessier
    Net Insight AB stephane.tessier@netinsight.se
    Västberga Allé 9 http://www.netinsight.se
    SE-126 30 Hägersten phone:+46-8-685 04 60
    Sweden fax: +46-8-685 04 20
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