Re: [PATCH] x86/tsc: Append description for 'tsc=unstable' boot parameter

From: Dou Liyang
Date: Mon Oct 09 2017 - 21:39:33 EST


Hi Pavel,

At 10/09/2017 08:25 PM, Pavel Tatashin wrote:
Hi Dou,

Have you tested tsc=unstable with your DR setup? Is it working as
expected? I mean instead of previous "notsc"?

Not yet, I have applied for the machine, I'll start testing once I have
access to it. And I am looking at this part of code to prepare for the
test. :-)


Reviewed-by: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>

Thank you very much.

Thanks,
dou.

Thank you,
Pavel

On Mon, Oct 9, 2017 at 5:03 AM, Dou Liyang <douly.fnst@xxxxxxxxxxxxxx> wrote:
Commit 8309f86cd41e ("x86/tsc: Provide 'tsc=unstable' boot parameter") adds
a new parameter 'tsc=unstable', but doesn't add some description to guide
users.

Append the description of 'tsc=unstable' at the end of 'tsc=' section.

Signed-off-by: Dou Liyang <douly.fnst@xxxxxxxxxxxxxx>
---
Documentation/admin-guide/kernel-parameters.txt | 3 +++
1 file changed, 3 insertions(+)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 9a84483..33e83b6 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -4196,6 +4196,9 @@
Used to run time disable IRQ_TIME_ACCOUNTING on any
platforms where RDTSC is slow and this accounting
can add overhead.
+ [x86] unstable: mark tsc clocksource as unstable, this
+ marks the TSC unconditionally unstable at bootup and
+ avoids any further wobbles once the TSC watchdog notices.

turbografx.map[2|3]= [HW,JOY]
TurboGraFX parallel port interface
--
2.5.5