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#6 read-only mapped file not coherent

v1.2.0
open
John Byrne
Filesystem (49)
3
2008-05-24
2002-08-28
David Zafman
No

If an O_RDONLY open file is mapped PROT_READ, it will
not be coherent relative to writable mappings on other
nodes. This is related to base linux code that turns
off VM_SHARED if the file block is in FMODE_WRITE when
doing the mmap.

Discussion

  • David Zafman
    David Zafman
    2004-03-23

    • priority: 5 --> 3
     
  • David Zafman
    David Zafman
    2004-12-11

    • assigned_to: dzafman --> jlbyrne
     
  • Roger Tsang
    Roger Tsang
    2008-05-24

    Logged In: YES
    user_id=1246761
    Originator: NO

    This must be a 2.4 problem. If I read correctly 2.6.11-ssi base code doesn't turn off VM_SHARED when file is FMODE_WRITE.

     
  • Roger Tsang
    Roger Tsang
    2008-05-24

    • milestone: --> v1.2.0