Re: [PATCH 1/9] timer_list: Add the base offset so remaining nsecs are accurate for non monotonic timers

From: Shuah Khan
Date: Mon Aug 17 2015 - 17:01:36 EST


On 08/17/2015 02:40 PM, John Stultz wrote:
> I noticed for non-monotonic timers in timer_list, some of the
> output looked a little confusing.
>
> For example:
> #1: <0000000000000000>, posix_timer_fn, S:01, hrtimer_start_range_ns, leap-a-day/2360
> # expires at 1434412800000000000-1434412800000000000 nsecs [in 1434410725062375469 to 1434410725062375469 nsecs]
>
> You'll note the relative time till the expiration "[in xxx to
> yyy nsecs]" is incorrect. This is because its printing the delta
> between CLOCK_MONOTONIC time to the CLOCK_REALTIME expiration.
>
> This patch fixes this issue by adding the clock offset to the
> "now" time which we use to calculate the delta.
>
> Cc: Prarit Bhargava <prarit@xxxxxxxxxx>
> Cc: Daniel Bristot de Oliveira <bristot@xxxxxxxxxx>
> Cc: Richard Cochran <richardcochran@xxxxxxxxx>
> Cc: Jan Kara <jack@xxxxxxx>
> Cc: Jiri Bohac <jbohac@xxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx>
> Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
> ---

Hi John,

I see just this patch in the series and not the others. Could you
please make sure I am on the cc for all of them. I will review and
try to get these into 4.3

thanks,
-- Shuah

--
Shuah Khan
Sr. Linux Kernel Developer
Open Source Innovation Group
Samsung Research America (Silicon Valley)
shuahkh@xxxxxxxxxxxxxxx | (970) 217-8978
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