linux-kernel - Re: [PATCH v1] rcu: Fix and improve RCU read lock checks when !CONFIG_DEBUG_LOCK

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Message-ID: <e8e1b75f-e631-4793-9130-472909264406@paulmck-laptop>
Date:   Fri, 14 Jul 2023 12:36:10 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Sandeep Dhavale <dhavale@...gle.com>
Cc:     Alan Huang <mmpgouride@...il.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Gao Xiang <hsiangkao@...ux.alibaba.com>,
        Frederic Weisbecker <frederic@...nel.org>,
        Neeraj Upadhyay <quic_neeraju@...cinc.com>,
        Josh Triplett <josh@...htriplett.org>,
        Boqun Feng <boqun.feng@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Zqiang <qiang.zhang1211@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        linux-erofs@...ts.ozlabs.org, xiang@...nel.org,
        Will Shiu <Will.Shiu@...iatek.com>, kernel-team@...roid.com,
        rcu@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v1] rcu: Fix and improve RCU read lock checks when
 !CONFIG_DEBUG_LOCK_ALLOC

On Fri, Jul 14, 2023 at 12:15:23PM -0700, Sandeep Dhavale wrote:
> >
> > Sandeep, thoughts?
> >
> I prefer to modify erofs check and contain the fix there as erofs
> cares about it and it's
> least invasive. For contexts where erofs cannot tell for sure, it will
> always schedule kworker
> (like CONFIG_PREEMPT_COUNT=n).
> 
> I will also do measurements to see if erofs should continue to check
> for context and
> what are the benefits.

At the end of the day, I guess it is Gao Xiang's and Chao Yu's decision.

							Thanx, Paul