Hello. I am reporting possible bugs caused by the absence of memory barriers.
Please examine this issue and let me know your opinion. In add_async_extent(), an async_extent object is allocated and initialized and then links to &cow->extents. However, since there is no memory barrier between the initialization and the linking to the list, these two operations are executed opposite order. And the re-ordering might result race condition. The similar issue is also in join_transaction(). Thank you Sincerely Shin Hong -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
