linux-kernel - [PATCH rcu 0/11] RCU update-side scalability update test

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Message-ID: <917e8cc8-8688-428a-9122-25544c5cc101@paulmck-laptop>
Date: Thu, 1 Aug 2024 17:43:02 -0700
From: "Paul E. McKenney" <paulmck@...nel.org>
To: rcu@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, kernel-team@...a.com, rostedt@...dmis.org
Subject: [PATCH rcu 0/11] RCU update-side scalability update test

Hello!

This series contains updates to RCU's "rcuscale" update-side performance
and scalability test, including a fix of an brown-paper-bag bug:

1.	Save a few lines with whitespace-only change.

2.	Dump stacks of stalled rcu_scale_writer() instances.

3.	Dump grace-period statistics when rcu_scale_writer() stalls.

4.	Mark callbacks not currently participating in barrier operation.

5.	Print detailed grace-period and barrier diagnostics.

6.	Provide clear error when async specified without primitives.

7.	Make all writer tasks report upon hang.

8.	Make rcu_scale_writer() tolerate repeated GFP_KERNEL failure.

9.	Use special allocator for rcu_scale_writer().

10.	NULL out top-level pointers to heap memory.

11.	Count outstanding callbacks per-task rather than per-CPU.

						Thanx, Paul

------------------------------------------------------------------------

 b/kernel/rcu/rcuscale.c |   10 --
 b/kernel/rcu/tree.c     |    3 
 kernel/rcu/rcuscale.c   |  206 +++++++++++++++++++++++++++++++++++++++++++-----
 3 files changed, 191 insertions(+), 28 deletions(-)