From: "Paul E. McKenney" <paulmck@kernel.org>
To: rcu@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, kernel-team@meta.com,
rostedt@goodmis.org, "Paul E. McKenney" <paulmck@kernel.org>
Subject: [PATCH 3/3] rcutorture: Remove MAXSMP and CPUMASK_OFFSTACK from TREE01
Date: Thu, 8 May 2025 16:42:30 -0700 [thread overview]
Message-ID: <20250508234230.1996554-3-paulmck@kernel.org> (raw)
In-Reply-To: <da86a280-f402-499f-a4ba-df626ca4c748@paulmck-laptop>
Back in the day, rcutorture was about the only thing that tested off-stack
CPU masks, but now any arm64 system with more than 256 CPUs tests it
full time. In fact, it is necessary to hack the kernel to prevent such
a system from testing off-stack CPU masks. This means that there is
no longer much point in rcutorture going out of its way to test this.
And given the differences in how CPUMASK_OFFSTACK is enabled in x86 and
arm64, rcutorture would need to go out of its way.
This commit therefore removes CONFIG_CPUMASK_OFFSTACK=y (and the
CONFIG_MAXSMP=y required to enable it on x86) from TREE01.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
tools/testing/selftests/rcutorture/configs/rcu/TREE01 | 2 --
1 file changed, 2 deletions(-)
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE01 b/tools/testing/selftests/rcutorture/configs/rcu/TREE01
index 8ae41d5f81a3e..54b1600c7eb5f 100644
--- a/tools/testing/selftests/rcutorture/configs/rcu/TREE01
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE01
@@ -8,8 +8,6 @@ CONFIG_NO_HZ_IDLE=y
CONFIG_NO_HZ_FULL=n
CONFIG_RCU_TRACE=y
CONFIG_HOTPLUG_CPU=y
-CONFIG_MAXSMP=y
-CONFIG_CPUMASK_OFFSTACK=y
CONFIG_RCU_NOCB_CPU=y
CONFIG_DEBUG_LOCK_ALLOC=n
CONFIG_RCU_BOOST=n
--
2.40.1
next prev parent reply other threads:[~2025-05-08 23:42 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-08 23:42 [PATCH 0/3] Make rcutorture safe(r) for arm64 Paul E. McKenney
2025-05-08 23:42 ` [PATCH 1/3] torture: Check for "Call trace:" as well as "Call Trace:" Paul E. McKenney
2025-05-08 23:42 ` [PATCH 2/3] rcutorture: Reduce TREE01 CPU overcommit Paul E. McKenney
2025-05-08 23:42 ` Paul E. McKenney [this message]
2025-05-09 13:18 ` [PATCH 0/3] Make rcutorture safe(r) for arm64 Joel Fernandes
2025-05-09 14:32 ` Paul E. McKenney
2025-05-09 17:57 ` Joel Fernandes
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20250508234230.1996554-3-paulmck@kernel.org \
--to=paulmck@kernel.org \
--cc=kernel-team@meta.com \
--cc=linux-kernel@vger.kernel.org \
--cc=rcu@vger.kernel.org \
--cc=rostedt@goodmis.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®