On Thu, Dec 31, 2015 at 09:56:28PM -0500, Tejun Heo wrote: > task_struct has a cluster of unsigned bitfields. Some are updated > under scheduler locks while others are updated only by the task > itself. Currently, the two classes of bitfields aren't distinguished > and end up on the same word which can lead to clobbering when there > are simultaneous read-modify-write attempts. While difficult to prove > definitely, it's likely that the resulting inconsistency led to low > frqeuency failures such as wrong memcg_may_oom state or loadavg > underflow due to clobbered sched_contributes_to_load. Ping. -- tejun -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>