From: tip-bot for Anna-Maria Gleixner <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: torvalds@linux-foundation.org, peterz@infradead.org,
hpa@zytor.com, linux-kernel@vger.kernel.org, hch@lst.de,
tglx@linutronix.de, mingo@kernel.org, john.stultz@linaro.org,
anna-maria@linutronix.de
Subject: [tip:timers/core] hrtimer: Implement SOFT/HARD clock base selection
Date: Tue, 16 Jan 2018 02:22:46 -0800 [thread overview]
Message-ID: <tip-42f42da41b54c191ae6a775e84a86c100d66c5e8@git.kernel.org> (raw)
In-Reply-To: <20171221104205.7269-30-anna-maria@linutronix.de>
Commit-ID: 42f42da41b54c191ae6a775e84a86c100d66c5e8
Gitweb: https://git.kernel.org/tip/42f42da41b54c191ae6a775e84a86c100d66c5e8
Author: Anna-Maria Gleixner <anna-maria@linutronix.de>
AuthorDate: Thu, 21 Dec 2017 11:41:58 +0100
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 16 Jan 2018 09:51:22 +0100
hrtimer: Implement SOFT/HARD clock base selection
All prerequisites to handle hrtimers for expiry in either hard or soft
interrupt context are in place.
Add the missing bit in hrtimer_init() which associates the timer to the
hard or the softirq clock base.
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: keescook@chromium.org
Link: http://lkml.kernel.org/r/20171221104205.7269-30-anna-maria@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
kernel/time/hrtimer.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index d93e3e7..3d20158 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -1220,8 +1220,9 @@ static inline int hrtimer_clockid_to_base(clockid_t clock_id)
static void __hrtimer_init(struct hrtimer *timer, clockid_t clock_id,
enum hrtimer_mode mode)
{
+ bool softtimer = !!(mode & HRTIMER_MODE_SOFT);
+ int base = softtimer ? HRTIMER_MAX_CLOCK_BASES / 2 : 0;
struct hrtimer_cpu_base *cpu_base;
- int base;
memset(timer, 0, sizeof(struct hrtimer));
@@ -1235,7 +1236,8 @@ static void __hrtimer_init(struct hrtimer *timer, clockid_t clock_id,
if (clock_id == CLOCK_REALTIME && mode & HRTIMER_MODE_REL)
clock_id = CLOCK_MONOTONIC;
- base = hrtimer_clockid_to_base(clock_id);
+ base += hrtimer_clockid_to_base(clock_id);
+ timer->is_soft = softtimer;
timer->base = &cpu_base->clock_base[base];
timerqueue_init(&timer->node);
}
@@ -1244,8 +1246,13 @@ static void __hrtimer_init(struct hrtimer *timer, clockid_t clock_id,
* hrtimer_init - initialize a timer to the given clock
* @timer: the timer to be initialized
* @clock_id: the clock to be used
- * @mode: timer mode: absolute (HRTIMER_MODE_ABS) or
- * relative (HRTIMER_MODE_REL); pinned is not considered here!
+ * @mode: The modes which are relevant for intitialization:
+ * HRTIMER_MODE_ABS, HRTIMER_MODE_REL, HRTIMER_MODE_ABS_SOFT,
+ * HRTIMER_MODE_REL_SOFT
+ *
+ * The PINNED variants of the above can be handed in,
+ * but the PINNED bit is ignored as pinning happens
+ * when the hrtimer is started
*/
void hrtimer_init(struct hrtimer *timer, clockid_t clock_id,
enum hrtimer_mode mode)
next prev parent reply other threads:[~2018-01-16 10:26 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-21 10:41 [PATCH v4 00/36] hrtimer: Provide softirq context hrtimers Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 01/36] timers: Use static keys for migrate_enable/nohz_active Anna-Maria Gleixner
2017-12-22 15:45 ` [PATCH v5 " Sebastian Andrzej Siewior
2018-01-14 22:13 ` Thomas Gleixner
2018-01-14 22:30 ` [PATCH v6 " Thomas Gleixner
2018-01-11 4:25 ` [PATCH v4 " Frederic Weisbecker
2018-01-16 3:40 ` [tip:timers/core] hrtimer: Optimize the hrtimer code by using static keys for migration_enable/nohz_active tip-bot for Thomas Gleixner
2017-12-21 10:41 ` [PATCH v4 02/36] hrtimer: Correct blantanly wrong comment Anna-Maria Gleixner
2018-01-11 18:28 ` Frederic Weisbecker
2018-01-16 1:02 ` Ingo Molnar
2018-01-16 3:40 ` [tip:timers/core] hrtimer: Correct blatantly incorrect comment tip-bot for Thomas Gleixner
2017-12-21 10:41 ` [PATCH v4 03/36] hrtimer: Fix kerneldoc for struct hrtimer_cpu_base Anna-Maria Gleixner
2018-01-16 3:41 ` [tip:timers/core] hrtimer: Fix kerneldoc syntax for 'struct hrtimer_cpu_base' tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 04/36] hrtimer: Cleanup clock argument in schedule_hrtimeout_range_clock() Anna-Maria Gleixner
2018-01-16 3:41 ` [tip:timers/core] hrtimer: Clean up the 'int clock' parameter of schedule_hrtimeout_range_clock() tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 05/36] hrtimer: Fix hrtimer function description Anna-Maria Gleixner
2018-01-16 3:42 ` [tip:timers/core] hrtimer: Fix hrtimer_start[_range_ns]() function descriptions tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 06/36] hrtimer: Ensure POSIX compliance (relative CLOCK_REALTIME hrtimers) Anna-Maria Gleixner
2018-01-16 3:42 ` [tip:timers/core] " tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 07/36] hrtimer: Cleanup hrtimer_mode enum Anna-Maria Gleixner
2018-01-16 3:43 ` [tip:timers/core] hrtimer: Clean up 'enum hrtimer_mode' tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 08/36] tracing/hrtimer: Take all clock bases and modes into account Anna-Maria Gleixner
2018-01-16 3:43 ` [tip:timers/core] tracing/hrtimer: Fix tracing bugs by taking " tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 09/36] tracing/hrtimer: Print hrtimer mode in hrtimer_start tracepoint Anna-Maria Gleixner
2018-01-16 3:43 ` [tip:timers/core] tracing/hrtimer: Print the hrtimer mode in the 'hrtimer_start' tracepoint tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 10/36] hrtimer: Switch for loop to _ffs() evaluation Anna-Maria Gleixner
2018-01-16 3:44 ` [tip:timers/core] hrtimer: Switch 'for' " tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 11/36] hrtimer: Store running timer in hrtimer_clock_base Anna-Maria Gleixner
2018-01-16 3:44 ` [tip:timers/core] " tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 12/36] hrtimer: Make room in struct hrtimer_cpu_base Anna-Maria Gleixner
2018-01-16 3:45 ` [tip:timers/core] hrtimer: Make room in 'struct hrtimer_cpu_base' tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 13/36] hrtimer: Reduce conditional code (hres_active) Anna-Maria Gleixner
2018-01-16 3:45 ` [tip:timers/core] hrtimer: Make the hrtimer_cpu_base::hres_active field unconditional, to simplify the code tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 14/36] hrtimer: Use accesor functions instead of direct access Anna-Maria Gleixner
2018-01-16 3:46 ` [tip:timers/core] " tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 15/36] hrtimer: Make the remote enqueue check unconditional Anna-Maria Gleixner
2018-01-16 3:46 ` [tip:timers/core] " tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 16/36] hrtimer: Make hrtimer_cpu_base.next_timer handling unconditional Anna-Maria Gleixner
2018-01-16 3:46 ` [tip:timers/core] " tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 17/36] hrtimer: Make hrtimer_reprogramm() unconditional Anna-Maria Gleixner
2018-01-16 3:47 ` [tip:timers/core] " tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 18/36] hrtimer: Make hrtimer_force_reprogramm() unconditionally available Anna-Maria Gleixner
2018-01-16 3:47 ` [tip:timers/core] " tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 19/36] hrtimer: Unify handling of hrtimer remove Anna-Maria Gleixner
2018-01-16 3:48 ` [tip:timers/core] hrtimer: Unify hrtimer removal handling tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 20/36] hrtimer: Unify handling of remote enqueue Anna-Maria Gleixner
2018-01-16 3:48 ` [tip:timers/core] hrtimer: Unify remote enqueue handling tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 21/36] hrtimer: Make remote enqueue decision less restrictive Anna-Maria Gleixner
2018-01-16 3:49 ` [tip:timers/core] " tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 22/36] hrtimer: Remove base argument from hrtimer_reprogram() Anna-Maria Gleixner
2018-01-16 3:49 ` [tip:timers/core] hrtimer: Remove the 'base' parameter " tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 23/36] hrtimer: Split hrtimer_start_range_ns() Anna-Maria Gleixner
2018-01-16 3:49 ` [tip:timers/core] hrtimer: Factor out __hrtimer_start_range_ns() tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 24/36] hrtimer: Split __hrtimer_get_next_event() Anna-Maria Gleixner
2018-01-16 3:50 ` [tip:timers/core] hrtimer: Factor out __hrtimer_next_event_base() tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 25/36] hrtimer: Use irqsave/irqrestore around __run_hrtimer() Anna-Maria Gleixner
2018-01-16 3:50 ` [tip:timers/core] " tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 26/36] hrtimer: Add clock bases and hrtimer mode for soft irq context Anna-Maria Gleixner
2018-01-16 3:51 ` [tip:timers/core] hrtimer: Add clock bases and hrtimer mode for softirq context tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 27/36] hrtimer: Prepare handling of hard and softirq based hrtimers Anna-Maria Gleixner
2018-01-16 3:51 ` [tip:timers/core] " tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 28/36] hrtimer: Implement support for " Anna-Maria Gleixner
2018-01-16 10:22 ` [tip:timers/core] " tip-bot for Anna-Maria Gleixner
2017-12-21 10:41 ` [PATCH v4 29/36] hrtimer: Implement SOFT/HARD clock base selection Anna-Maria Gleixner
2018-01-16 10:22 ` tip-bot for Anna-Maria Gleixner [this message]
2017-12-21 10:41 ` [PATCH v4 30/36] can/bcm: Replace hrtimer_tasklet with softirq based hrtimer Anna-Maria Gleixner
2017-12-21 10:42 ` [PATCH v4 31/36] mac80211_hwsim: Replace hrtimer tasklet with softirq hrtimer Anna-Maria Gleixner
2018-01-04 15:12 ` Johannes Berg
2018-01-04 15:18 ` Thomas Gleixner
2017-12-21 10:42 ` [PATCH v4 32/36] xfrm: " Anna-Maria Gleixner
2017-12-21 10:42 ` [PATCH v4 33/36] softirq: Remove tasklet_hrtimer Anna-Maria Gleixner
2017-12-21 10:42 ` [PATCH v4 34/36] ALSA/dummy: Replace tasklet with softirq hrtimer Anna-Maria Gleixner
2018-01-16 10:23 ` [tip:timers/core] " tip-bot for Thomas Gleixner
2017-12-21 10:42 ` [PATCH v4 35/36] usb/gadget/NCM: " Anna-Maria Gleixner
2018-01-16 10:23 ` [tip:timers/core] " tip-bot for Thomas Gleixner
2017-12-21 10:42 ` [PATCH v4 36/36] net/mvpp2: " Anna-Maria Gleixner
2018-01-16 1:39 ` [PATCH v4 00/36] hrtimer: Provide softirq context hrtimers Ingo Molnar
2018-01-16 2:03 ` Ingo Molnar
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