Messages in this thread | | | Date | Tue, 08 Mar 2016 06:03:24 -0500 | From | Prarit Bhargava <> | Subject | Re: [PATCH 0/2 v6] printk, Add monotonic and real printk timestamps |
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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 >
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