[prev in list] [next in list] [prev in thread] [next in thread]
List: linux-block
Subject: Re: [PATCH 02/15] blkcg: delay blkg destruction until after writeback has finished
From: Dennis Zhou <dennisszhou () gmail ! com>
Date: 2018-08-31 20:19:10
Message-ID: 20180831201909.GA20194 () dennisz-mbp ! dhcp ! thefacebook ! com
[Download RAW message or body]
Hi Josef,
On Fri, Aug 31, 2018 at 11:27:07AM -0400, Josef Bacik wrote:
> So the general approach is correct, but it's sort of confusing because you are
> using nr_cgwbs as a reference counter, because it's set at 1 at blkg creation
> time regardless of wether or not there's an assocated wb cg. So instead why not
> just have a refcount_t ref, set it to 1 on creation and make the wb cg take a
> ref when it's attached, and then just do the get/put like normal and cleanup as
> you have below? What you are doing is a reference counter masquerading as a
> count of the wb cg's, just add full ref counting to the blkcg and call it a day,
> it'll be much less confusing. Thanks,
Yeah, that makes more sense. I've switched to using refcount_t and
renamed it to wbcg_refcnt. The corresponding actions have been renamed.
I've also fixed the kbuild error in v2.
Thanks,
Dennis
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic