From: Wolfram Sang <wsa@the-dreams.de>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Simon Horman <horms@verge.net.au>,
Kevin Hilman <khilman@kernel.org>,
Tyler Baker <tyler.baker@linaro.org>,
Borislav Petkov <bp@alien8.de>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Magnus Damm <magnus.damm@gmail.com>,
linux-sh@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: Possible regression due to "tick: broadcast: Prevent livelock from event handler"
Date: Fri, 3 Jul 2015 15:32:45 +0200 [thread overview]
Message-ID: <20150703133245.GA19284@katana> (raw)
In-Reply-To: <alpine.DEB.2.11.1507031511180.3916@nanos>
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> So with high res timers it boots. Can you please provide the output of
> /proc/timer_list for that case?
Sure:
Timer List Version: v0.7
HRTIMER_MAX_CLOCK_BASES: 4
now at 40752899169 nsecs
cpu: 0
clock 0:
.base: c03aa990
.index: 0
.resolution: 1 nsecs
.get_time: ktime_get
.offset: 0 nsecs
active timers:
#0: tick_cpu_sched, tick_sched_timer, S:01
# expires at 40760000000-40760000000 nsecs [in 7100831 to 7100831 nsecs]
#1: sched_clock_timer, sched_clock_poll, S:01
# expires at 21474836475000000-21474836475000000 nsecs [in 21474795722100831 to 21474795722100831 nsecs]
clock 1:
.base: c03aa9c8
.index: 1
.resolution: 1 nsecs
.get_time: ktime_get_real
.offset: 0 nsecs
active timers:
clock 2:
.base: c03aaa00
.index: 2
.resolution: 1 nsecs
.get_time: ktime_get_boottime
.offset: 0 nsecs
active timers:
clock 3:
.base: c03aaa38
.index: 3
.resolution: 1 nsecs
.get_time: ktime_get_clocktai
.offset: 0 nsecs
active timers:
.expires_next : 40760000000 nsecs
.hres_active : 1
.nr_events : 770
.nr_retries : 29
.nr_hangs : 0
.max_hang_time : 0 nsecs
.nohz_mode : 2
.last_tick : 40400000000 nsecs
.tick_stopped : 0
.idle_jiffies : 4294941337
.idle_calls : 378
.idle_sleeps : 354
.idle_entrytime : 40743316650 nsecs
.idle_waketime : 40743316650 nsecs
.idle_exittime : 40743377685 nsecs
.idle_sleeptime : 37586425789 nsecs
.iowait_sleeptime: 0 nsecs
.last_jiffies : 4294941368
.next_jiffies : 4294941389
.idle_expires : 40930000000 nsecs
jiffies: 4294941371
Tick Device: mode: 1
Per CPU device: 0
Clock Event Device: e0180000.timer
max_delta_ns: 131071523464982
min_delta_ns: 61035
mult: 70369
shift: 31
mode: 3
next_event: 40760000000 nsecs
set_next_event: em_sti_clock_event_next
set_mode: em_sti_clock_event_mode
event_handler: hrtimer_interrupt
retries: 0
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next prev parent reply other threads:[~2015-07-03 13:33 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-03 2:40 Possible regression due to "tick: broadcast: Prevent livelock from event handler" Simon Horman
2015-07-03 6:46 ` Geert Uytterhoeven
2015-07-03 9:23 ` Thomas Gleixner
2015-07-03 10:54 ` Wolfram Sang
2015-07-03 11:02 ` Russell King - ARM Linux
2015-07-03 11:07 ` Wolfram Sang
2015-07-03 11:13 ` Russell King - ARM Linux
2015-07-03 11:41 ` Wolfram Sang
2015-07-03 13:19 ` Thomas Gleixner
2015-07-03 13:32 ` Wolfram Sang [this message]
2015-07-03 14:17 ` Thomas Gleixner
2015-07-03 14:37 ` Wolfram Sang
2015-07-03 14:45 ` Sudeep Holla
2015-07-03 14:54 ` Thomas Gleixner
2015-07-03 14:57 ` Sudeep Holla
2015-07-03 14:53 ` Thomas Gleixner
2015-07-03 15:09 ` Wolfram Sang
2015-07-03 15:23 ` Thomas Gleixner
2015-07-03 15:40 ` Wolfram Sang
2015-07-03 15:53 ` Thomas Gleixner
2015-07-03 16:00 ` Wolfram Sang
2015-07-06 4:42 ` Magnus Damm
2015-07-29 2:23 ` Simon Horman
2015-07-03 17:02 ` Geert Uytterhoeven
2015-07-06 4:45 ` Magnus Damm
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