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From: David Herrmann <dh.herrmann@gmail.com>
Date: Fri, 20 Apr 2018 08:49:10 +0200
Message-ID: <CANq1E4QppGAaU5PYbGpuC00S6wGQcAt70Z7CntZHiLC6748z2A@mail.gmail.com>
Subject: Re: [RFC/RFT patch 0/7] timekeeping: Unify clock MONOTONIC and clock BOOTTIME
To: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: John Stultz <john.stultz@linaro.org>, Ingo Molnar <mingo@kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        LKML <linux-kernel@vger.kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Steven Rostedt <rostedt@goodmis.org>, Petr Mladek <pmladek@suse.com>,
        Mark Salyzyn <salyzyn@android.com>,
        Prarit Bhargava <prarit@redhat.com>,
        Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
        Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        Kevin Easton <kevin@guarana.org>,
        Michael Kerrisk <mtk.manpages@gmail.com>,
        Jonathan Corbet <corbet@lwn.net>
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Hi

On Fri, Apr 20, 2018 at 7:44 AM, Sergey Senozhatsky
<sergey.senozhatsky.work@gmail.com> wrote:
> On (04/20/18 06:37), David Herrmann wrote:
>>
>> I get lots of timer-errors on Arch-Linux booting current master, after
>> a suspend/resume cycle. Just a selection of errors I see on resume:
>
> Hello David,
> Any chance you can revert the patches in question and test? I'm running
> ARCH (4.17.0-rc1-dbg-00042-gaa03ddd9c434) and suspend/resume cycle does
> not trigger any errors. Except for this one
>
>         kernel: do_IRQ: 0.55 No irq handler for vector

I can easily reproduce it by sleeping for >5min, so the systemd
watchdog timers are triggered. The patches don't revert cleanly, so I
didn't look into booting without them, yet. I will try just linking
the monotonic clock to the monotonic_active clock later.

Also, doesn't this hunk in 72199320d49d need a 'break;':

diff --git a/kernel/time/posix-stubs.c b/kernel/time/posix-stubs.c
index b258bee13b02..6259dbc0191a 100644
--- a/kernel/time/posix-stubs.c
+++ b/kernel/time/posix-stubs.c
@@ -73,6 +73,8 @@ int do_clock_gettime(clockid_t which_clock, struct
timespec64 *tp)
        case CLOCK_BOOTTIME:
                get_monotonic_boottime64(tp);
                break;
+       case CLOCK_MONOTONIC_ACTIVE:
+               ktime_get_active_ts64(tp);
        default:
                return -EINVAL;
        }