From: Prarit Bhargava <prarit@redhat.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org, Petr Mladek <pmladek@suse.com>,
John Stultz <john.stultz@linaro.org>,
Xunlei Pang <pang.xunlei@linaro.org>,
Baolin Wang <baolin.wang@linaro.org>,
Andrew Morton <akpm@linux-foundation.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Petr Mladek <pmladek@suse.cz>, Tejun Heo <tj@kernel.org>,
Peter Hurley <peter@hurleysoftware.com>,
Vasily Averin <vvs@virtuozzo.com>, Joe Perches <joe@perches.com>
Subject: Re: [PATCH 0/2 v6] printk, Add monotonic and real printk timestamps
Date: Tue, 08 Mar 2016 06:03:24 -0500 [thread overview]
Message-ID: <56DEB17C.9000201@redhat.com> (raw)
In-Reply-To: <alpine.DEB.2.11.1603080858570.3859@nanos>
On 03/08/2016 02:59 AM, Thomas Gleixner wrote:
> On Tue, 23 Feb 2016, Prarit Bhargava wrote:
>
>> This patchset adds monotonic and real printk timestamps. The first patch
>> changes CONFIG_PRINT_TIME from a bool to an int to allow for the additional
>> timestamps that are added in patch 2.
>>
>> Changes from v6: Petr Mladek pointed out that the current patch
>> fails to indicate to userspace programs which timestamp is being used.
>
> How is that solved?
Hi Thomas,
Userspace programs can now look at /sys/modules/printk/parameters/time which
will contain [0-3] for the timestamp clock.
The file is globally readable so it shouldn't cause any problems for userspace
programs:
[root@intel-wildcatpass-06 dummy-module]# ls -l /sys/module/printk/parameters/time
-rw-r--r--. 1 root root 4096 Mar 8 06:01 /sys/module/printk/parameters/time
P.
>
> Thanks,
>
> tglx
>
next prev parent reply other threads:[~2016-03-08 11:03 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-23 17:53 Prarit Bhargava
2016-02-23 17:53 ` [PATCH 1/2 v6] lib, switch CONFIG_PRINTK_TIME to int Prarit Bhargava
2016-02-23 17:54 ` [PATCH 2/2 v6] printk, allow different timestamps for printk.time Prarit Bhargava
2016-03-08 7:59 ` [PATCH 0/2 v6] printk, Add monotonic and real printk timestamps Thomas Gleixner
2016-03-08 11:03 ` Prarit Bhargava [this message]
2016-03-10 10:00 ` Petr Mladek
2016-03-10 15:35 ` Thomas Gleixner
2016-04-18 15:30 ` Prarit Bhargava
2016-04-19 8:56 ` Petr Mladek
2016-04-20 17:09 ` Prarit Bhargava
2016-04-21 13:20 ` Prarit Bhargava
2016-04-26 13:00 ` Petr Mladek
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