Messages in this thread | | | Date | Tue, 11 Sep 2018 16:50:09 -0700 | From | Tejun Heo <> | Subject | Re: [PATCH 03/12] blkcg: convert blkg_lookup_create to find closest blkg |
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On Tue, Sep 11, 2018 at 02:41:28PM -0400, Dennis Zhou wrote: > From: "Dennis Zhou (Facebook)" <dennisszhou@gmail.com> > > There are several scenarios where blkg_lookup_create can fail. Examples > include the blkcg dying, request_queue is dying, or simply being OOM. At > the end of the day, most handle this by simply falling back to the > q->root_blkg and calling it a day. > > This patch implements the notion of closest blkg. During > blkg_lookup_create, if it fails to create, return the closest blkg > found or the q->root_blkg. blkg_try_get_closest is introduced and used > during association so a bio is always attached to a blkg. > > Signed-off-by: Dennis Zhou <dennisszhou@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Thanks.
-- tejun
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