Hello, CAI. On Wed, Oct 05, 2016 at 10:09:39AM -0400, CAI Qian wrote: > > This one seems to be the offender. cgroup is trying to offline a > > cpuset css, which takes place under cgroup_mutex. The offlining ends > > up trying to drain active usages of a sysctl table which apprently is > > not happening. Did something hang or crash while trying to generate > > sysctl content? > > Hmm, I am not sure, since the trinity was running from an non-privileged > user which can only read content from /proc or /sys. So, userland, priviledged or not, can't cause this. The ref is held only while the kernel code is operating to generate content or iterating, which shouldn't be affected by userland actions. This is caused by kernel code hanging or crashing while holding a ref. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
