From: vincent.donnefort@arm.com
To: peterz@infradead.org, tglx@linutronix.de, linux-kernel@vger.kernel.org
Cc: valentin.schneider@arm.com,
Vincent Donnefort <vincent.donnefort@arm.com>
Subject: [PATCH 1/4] cpu/hotplug: Allowing to reset fail injection
Date: Mon, 11 Jan 2021 17:10:44 +0000 [thread overview]
Message-ID: <1610385047-92151-2-git-send-email-vincent.donnefort@arm.com> (raw)
In-Reply-To: <1610385047-92151-1-git-send-email-vincent.donnefort@arm.com>
From: Vincent Donnefort <vincent.donnefort@arm.com>
Currently, the only way of resetting this file is to actually try to run
a hotplug, hotunplug or both. This is quite annoying for testing and, as
the default value for this file is -1, it seems quite natural to let a
user write it.
Signed-off-by: Vincent Donnefort <vincent.donnefort@arm.com>
---
kernel/cpu.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 1b6302e..9121edf 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -2207,6 +2207,11 @@ static ssize_t write_cpuhp_fail(struct device *dev,
if (ret)
return ret;
+ if (fail == CPUHP_INVALID) {
+ st->fail = fail;
+ return count;
+ }
+
if (fail < CPUHP_OFFLINE || fail > CPUHP_ONLINE)
return -EINVAL;
--
2.7.4
next prev parent reply other threads:[~2021-01-11 17:12 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-11 17:10 [PATCH 0/4] cpu/hotplug: rollback and "fail" interface fixes vincent.donnefort
2021-01-11 17:10 ` vincent.donnefort [this message]
2021-01-11 17:10 ` [PATCH 2/4] cpu/hotplug: CPUHP_BRINGUP_CPU exception in fail injection vincent.donnefort
2021-01-20 12:58 ` Peter Zijlstra
2021-01-20 15:17 ` Vincent Donnefort
2021-01-20 17:30 ` Peter Zijlstra
2021-01-11 17:10 ` [PATCH 3/4] cpu/hotplug: Add cpuhp_invoke_callback_range() vincent.donnefort
2021-01-20 13:11 ` Peter Zijlstra
2021-01-20 17:54 ` Peter Zijlstra
2021-01-20 17:45 ` Peter Zijlstra
2021-01-20 17:53 ` Peter Zijlstra
2021-01-21 10:57 ` Vincent Donnefort
2021-01-21 11:18 ` Peter Zijlstra
2021-01-20 17:49 ` Peter Zijlstra
2021-01-11 17:10 ` [PATCH 4/4] cpu/hotplug: Fix CPU down rollback vincent.donnefort
2021-01-21 14:57 ` Peter Zijlstra
2021-01-21 15:43 ` Vincent Donnefort
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=1610385047-92151-2-git-send-email-vincent.donnefort@arm.com \
--to=vincent.donnefort@arm.com \
--cc=linux-kernel@vger.kernel.org \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
--cc=valentin.schneider@arm.com \
/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;
as well as URLs for NNTP newsgroup(s).