Hi Tejun, Andy was looking at blkio throttling capability to throttle all the IO going to a disk. He wanted to use it to throttle all IO going to a data device of thin pool when thin pool is about to be full. Hoping this will give him extra time to respond and thin pool does not get full. This requries hierarchical control enabled in blkio. In the past we had that sane_behavior flag to enable this on cgroup V1 and that allowed one to put upper limit in root cgroup and that controlled all IO going to disk. Now sane_behavior flag is gone and V2 does not allow configure limits for root cgroup. So looks like we lost that capability now. Am I missing something. Is there a way to still enable it. Thanks Vivek -- To unsubscribe from this list: send the line "unsubscribe cgroups" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
