Messages in this thread | | | Date | Tue, 16 Jun 2015 17:54:36 -0400 | From | Tejun Heo <> | Subject | Re: [PATCH 3/3] writeback, blkio: add documentation for cgroup writeback support |
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Hello, Ted.
On Mon, Jun 15, 2015 at 07:35:19PM -0400, Theodore Ts'o wrote: > So if there is some way we can signal to any cgroup that that might be > throttling writeback or disk I/O that the jbd/jbd2 process should be > considered privileged, that would be a good since it would allow us to > avoid a potential priority inversion problem.
I see. In the long term, I think we might need to come up with a way to overcharge a slower cgroup to avoid blocking faster ones for cases where some IOs are depended upon by more than one cgroups. That'd take quite a bit of work from blkcg side. Will think more about it.
Thanks.
-- tejun
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