linux-kernel - Re: [PATCH v3 rcu 0/13] SRCU-lite changes for v6.13

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Message-ID: <48dfaa56-4d1f-47e5-8174-3a433711e0db@amd.com>
Date: Tue, 12 Nov 2024 10:07:40 +0530
From: Neeraj Upadhyay <Neeraj.Upadhyay@....com>
To: paulmck@...nel.org, frederic@...nel.org, rcu@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, kernel-team@...a.com, rostedt@...dmis.org
Subject: Re: [PATCH v3 rcu 0/13] SRCU-lite changes for v6.13

On 10/15/2024 9:41 PM, Paul E. McKenney wrote:
> Hello!
> 
> This v3 series adds support and testing for srcu_read_lock_lite()
> and srcu_read_unlock_lite(), which avoid smp_mb(), but add a couple of
> synchronize_rcu() calls to the grace-period processing and may only be
> used where RCU is watching.
> 
> 1.	Rename srcu_might_be_idle() to srcu_should_expedite().
> 
> 2.	Introduce srcu_gp_is_expedited() helper function.
> 
> 3.	Renaming in preparation for additional reader flavor.
> 
> 4.	Bit manipulation changes for additional reader flavor.
> 
> 5.	Standardize srcu_data pointers to "sdp" and similar.
> 
> 6.	Improve srcu_read_lock{,_nmisafe}() comments.
> 
> 7.	Create CPP macros for normal and NMI-safe SRCU readers.
> 
> 8.	Add srcu_read_lock_lite() and srcu_read_unlock_lite().
> 
> 9.	Allow inlining of __srcu_read_{,un}lock_lite().
> 
> 10.	Expand RCUTORTURE_RDR_MASK_[12] to eight bits.
> 
> 11.	Add reader_flavor parameter for SRCU readers.
> 
> 12.	Add srcu_read_lock_lite() support to rcutorture.reader_flavor.
> 
> 13.	Add light-weight SRCU scenario.
> 
> 14.	Add srcu_read_lock_lite() support using "srcu-lite".
> 
> 15.	Improve srcu_read_lock_lite() kernel-doc comment.
> 
> Changes since v2:
> 
> o	Apply acked-by tag.
> 
> o	Split commit per Neeraj Upadhyay feedback.
> 
> Changes since v1:
> 
> o	Apply reviewed-by tag.
> 
> o	Link to performance data.
> 
> o	Add commit improving kernel-doc comment.
> 
> o	Pull out into separate branch to avoid dependency on an otherwise
> 	unrelated refscale commit.
> 
> 						Thanx, Paul
> 
> ------------------------------------------------------------------------
> 

For this series:

Reviewed-by: Neeraj Upadhyay <Neeraj.Upadhyay@....com>


- Neeraj