Messages in this thread | | | Date | Tue, 10 May 2016 17:03:50 -0400 | From | Tejun Heo <> | Subject | Re: [PATCH BUGFIX V2] block: add missing group association in bio-cloning functions |
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On Tue, May 10, 2016 at 11:02:12PM +0200, Paolo Valente wrote: > When a bio is cloned, the newly created bio must be associated with > the same blkcg as the original bio (if BLK_CGROUP is enabled). If > this operation is not performed, then the new bio is not associated > with any group, and the group of the current task is returned when > the group of the bio is requested. > > Depending on the cloning frequency, this may cause a large > percentage of the bios belonging to a given group to be treated > as if belonging to other groups (in most cases as if belonging to > the root group). The expected group isolation may thereby be broken. > > This commit adds the missing association in bio-cloning functions. > > Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Acked-by: Tejun Heo <tj@kernel.org>
Thanks.
-- tejun
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