Multithreaded MFC crash if extents on raw partitions
When running multithreaded MFC (markForCollectionMt) on a system where
the extents are on raw partitions, there is a fair risk that the gem running
the MFC will crash with a SEGV.
This is a bug in the multithreaded MFC introduced in 6.6. Regular markForCollection
is not affected.
Systems running with extents on file system are not affected.
While the MFC crashes and any MFC work done is lost, there is no persistent
corruption.
Workaround
Use only the single-threaded markForCollection if your extents are on raw
partitions.
Last updated: 2/24/12