Hello Sponsors, Attached you can find a debdiff for the artful series which fixes the issue expressed on this bug for powerpc architecture.
The patch cover multiple commits from upstream MariaDB, * Commit 6ea41f1e84eb6b864cac17ad0b862bde9820dc33: Implements the os_fast_mutex(unlock_full_barrier/trylock_full_barrier) which implies a full memory barrier. It also implements the os_mb OS memory barrier primitives for the different architectures which is guaranteed to act as full acquire-release barrier. * Commit 5ad02062d928cccbd29c0a2db6f0f7ceb33195d1: Based on the previous commit, it adds a memory barrier on the mutex_exit to prevent reading the number of waiters before releasing the lock, this is completed with a modification on mutex_set_waiters that adds a os_mb to make sure waiters store won't pass over mutex_test_and_set. * Commit 40497577ffd9f85557b15e08ad913f627b2e9530: The ib mutex set_and_test function and acquires the lock by calling the os_atomic_test_and_set_byte_acquire method which should be safe in PowerPC, at the same time the mutex unlock method will call the os_atomic_test_and_set_byte_release which is implemented as a __sync_lock_release + a __sync_synchronize call in PowerPC. I've already performed the verification marked on this bug, with the following results: http://pastebin.ubuntu.com/25286767/ ** Patch added: "lp1657256-artful.debdiff" https://bugs.launchpad.net/ubuntu/+source/percona-xtradb-cluster-5.5/+bug/1657256/+attachment/4930410/+files/lp1657256-artful.debdiff -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1657256 Title: Percona crashes when doing a a 'larger' update To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/percona-xtradb-cluster-5.5/+bug/1657256/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
