1. 16 9月, 2020 36 次提交
  2. 07 9月, 2020 2 次提交
  3. 06 9月, 2020 1 次提交
    • M
      xfs: don't update mtime on COW faults · b17164e2
      Mikulas Patocka 提交于
      When running in a dax mode, if the user maps a page with MAP_PRIVATE and
      PROT_WRITE, the xfs filesystem would incorrectly update ctime and mtime
      when the user hits a COW fault.
      
      This breaks building of the Linux kernel.  How to reproduce:
      
       1. extract the Linux kernel tree on dax-mounted xfs filesystem
       2. run make clean
       3. run make -j12
       4. run make -j12
      
      at step 4, make would incorrectly rebuild the whole kernel (although it
      was already built in step 3).
      
      The reason for the breakage is that almost all object files depend on
      objtool.  When we run objtool, it takes COW page fault on its .data
      section, and these faults will incorrectly update the timestamp of the
      objtool binary.  The updated timestamp causes make to rebuild the whole
      tree.
      Signed-off-by: NMikulas Patocka <mpatocka@redhat.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      b17164e2
  4. 03 9月, 2020 1 次提交