On 05/09/2014 03:13 PM, Tejun Heo wrote: > Currently cgroup implements refcnting separately using atomic_t > cgroup->refcnt. The destruction paths of cgroup and css are rather > complex and bear a lot of similiarities including the use of RCU and > bouncing to a work item. > > This patch makes cgroup use the refcnt of self css for refcnting > instead of using its own. This makes cgroup refcnting use css's > percpu refcnt and share the destruction mechanism. >... In next-20150515, this patch causes silent boot failures on NVIDIA Tegra ARM systems. There isn't even any earlyprintk. Reverting this one patch solves this. I was a bit surprised that cgroups would cause such an issue, but looking at a normal kernel boot, I guess cgroup does get initialized very early: Uncompressing Linux... done, booting the kernel. [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Initializing cgroup subsys cpuacct Anyway, I'll try to track down what the problem is, but if someone familiar with this patch could give it a look, that'd be very useful, since I'm not at all familiar with this code or feature. -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
