We're also seeing this with 4.4.0-111-generic (on Trusty), and a very similar hardware profile. The boxes in question are running Swift with a large (millions) number of objects all approx 32k in size.
I'm currently fio'ing in a test environment to try to reproduce this away from production. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1724173 Title: bcache makes the whole io system hang after long run time To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-xenial/+bug/1724173/+subscriptions -- ubuntu-bugs mailing list firstname.lastname@example.org https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs