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  1. Core ReactOS
  2. CORE-14349

Deadlocks can happen in Cc

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Details

    • Bug
    • Resolution: Fixed
    • Critical
    • 0.4.9
    • NTCore
    • None

    Description

      This is due to the number of locks being present in Cc (Shared cache map, VACB, master lock) and the way they are locked.

      We often see the scenario:

      • Lock master, lock shared, lock VACB
      • Release shared, release master
      • Lock master, lock shared
      • Release VACB
      • Release shared
      • Release master

      The problem is that, it's an unlocking in disorder and if someone else tries to perform using the same path, then, we have an issue if it can lock master & shared, but not VACB and if VACB tries to acquire master & shared to release VACB (this is what we call, a deadlock ).

      Attachments

        1. vacb_lock.diff
          7 kB
        2. vacb_lock.diff
          9 kB
        3. vacb_lock.diff
          9 kB
        4. vacb_lock.diff
          12 kB
        5. vacb_lock.diff
          13 kB
        6. vacb_lock.diff
          14 kB
        7. vacb_lock.diff
          15 kB
        8. vacb_lock.diff
          16 kB
        9. vacb_lock.diff
          19 kB
        10. vacb_lock.diff
          19 kB
        11. vacb_lock.diff
          18 kB
        12. vacb_lock.diff
          19 kB
        13. 0.4.8-RC-8-gbfcab8b__And_VACBLOCK_applied__BSOD0x34.log
          113 kB

        Issue Links

          is blocked by

          Bug - A problem which impairs or prevents the functions of the product. CORE-14449 Stack overflow in interrupt handlers, BSOD 0x7F

          • Critical - Crashes, loss of data, severe memory leak.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. CORE-14549 Intermittent "(ntoskrnl/mm/ARM3/pagfault.c:1127) Access on reserved section?" + "[SYSREG] timeout", on all 3 testbots. Since CORE-14349 fix

          • Critical - Crashes, loss of data, severe memory leak.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. CORE-14548 Relocated dlls randomly contain incorrect pages

          • Major - Major loss of function.
          • Resolved
          relates to

          Bug - A problem which impairs or prevents the functions of the product. CORE-14553 [NTOSKRNL] suspected bug: 0.4.9-dev-709-g953dc72 aka "Dropping the VACB lock" increased thread-count unexpectedly

          • Trivial - Cosmetic problem like misspelt words or misaligned text.
          • Untriaged

          Activity

            People

              Heis Spiter Pierre Schweitzer
              Heis Spiter Pierre Schweitzer
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              Dates

                Created:
                Updated:
                Resolved: