Hello, On Thu, Nov 19, 2015 at 03:54:35PM +0530, Raghavendra K T wrote: > While I was creating thousands of docker container on a power8 baremetal > (config: 4.3.0 kernel 1TB RAM, 20core (=160 cpu) system. After creating > around 5600 container > I have hit below problem. > [This is looking similar to > https://bugzilla.kernel.org/show_bug.cgi?id=101011, but > kernel had Revert "ext4: remove block_device_ejected" (bdfe0cbd746aa9) since > it is 4.3.0 tagged kernel] > > Any hints on how to go about the fix. Please let me know if you think any > more information needed. > > docker daemon is device mapper based. (and it took a day to recreate the > problem) > > [ by disabling CONFIG_BLK_CGROUP and CONFIG_CGROUP_WRITEBACK I am able to > create 10k containers without any problem]
Could be the same problem that Ilya is trying to fix. ie. blkdev i_wb pointing to a stale wb. Can you please see whether the following patch resolves the issue? http://lkml.kernel.org/g/1448054554-24138-1-git-send-email-idryo...@gmail.com Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
