linux-kernel - Re: [PATCH v2 2/2] mm/slab: break up RCU readers on SLAB_TYPESAFE_BY

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Message-Id: <20230417190831.1744-1-sj@kernel.org>
Date:   Mon, 17 Apr 2023 19:08:31 +0000
From:   SeongJae Park <sj@...nel.org>
To:     Vlastimil Babka <vbabka@...e.cz>
Cc:     SeongJae Park <sj@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        akpm@...ux-foundation.org, paulmck@...nel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] mm/slab: break up RCU readers on SLAB_TYPESAFE_BY_RCU example code

On Mon, 17 Apr 2023 21:02:22 +0200 Vlastimil Babka <vbabka@...e.cz> wrote:

> On 4/17/23 21:01, SeongJae Park wrote:
> > On Mon, 17 Apr 2023 18:53:24 +0100 Matthew Wilcox <willy@...radead.org> wrote:
> > 
> >> On Mon, Apr 17, 2023 at 05:26:57PM +0000, SeongJae Park wrote:
> >> > Hi Vlastimil,
> >> > 
> >> > On Mon, 17 Apr 2023 13:05:40 +0200 Vlastimil Babka <vbabka@...e.cz> wrote:
> >> > 
> >> > > On 4/15/23 05:31, SeongJae Park wrote:
> >> > > > The SLAB_TYPESAFE_BY_RCU example code snippet is having not tiny RCU
> >> > > 
> >> > > Since "tiny RCU" means something quite specific in the RCU world, it can be
> >> > > confusing to read it in this sense. We could say e.g. "... snippet uses a
> >> > > single RCU read-side critical section for retries"?
> >> > 
> >> > Looks much better, thank you for this suggestion!
> >> > 
> >> > > 
> >> > > > read-side critical section.  'Documentation/RCU/rculist_nulls.rst' has
> >> > > > similar example code snippet, and commit da82af04352b ("doc: Update and
> >> > > > wordsmith rculist_nulls.rst") has broken it.
> >> > > 
> >> > > "has broken it" has quite different meaning than "has broken it up" :) I
> >> > > guess we could just add the "up", unless someone has an even better wording.
> >> > 
> >> > Good point, thank you for your suggestion!
> >> > 
> >> > I will apply above suggestion on the next spin.
> >> 
> >> For the last one, perhaps changing the tense would have more clarity:
> >> 
> >> similar example code snippet, and commit da82af04352b ("doc: Update and
> >> wordsmith rculist_nulls.rst") broke it up.
> > 
> > Thank you for this suggestion, Matthew!  Will send a new version.
> 
> It's ok, I can just use that when picking the patches up without a new resend.

Sorry, already sent[1]...  Please use or ignore it on your convenience.

[1] https://lore.kernel.org/linux-mm/20230417190450.1682-1-sj@kernel.org/


Thanks,
SJ

> 
> > Thanks,
> > SJ
>