tree de14dd00730f47a1678b5978a79575bb2bd08b3d
parent 87fbeb8813bd8d48cb4b5c884793cc6b5126f6b8
author Dennis Zhou <dennis@kernel.org> 1600288865 -0700
committer Dennis Zhou <dennis@kernel.org> 1600444987 +0000

io_uring: add blkcg accounting to offloaded operations

There are a few operations that are offloaded to the worker threads. In
this case, we lose process context and end up in kthread context. This
results in ios to be not accounted to the issuing cgroup and
consequently end up as issued by root. Just like others, adopt the
personality of the blkcg too when issuing via the workqueues.

For the SQPOLL thread, it will live and attach in the inited cgroup's
context.

Signed-off-by: Dennis Zhou <dennis@kernel.org>