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Thomas Gleixner
a3ed0e4393
Revert commits92af4dcb4e("tracing: Unify the "boot" and "mono" tracing clocks")127bfa5f43("hrtimer: Unify MONOTONIC and BOOTTIME clock behavior")7250a4047a("posix-timers: Unify MONOTONIC and BOOTTIME clock behavior")d6c7270e91("timekeeping: Remove boot time specific code")f2d6fdbfd2("Input: Evdev - unify MONOTONIC and BOOTTIME clock behavior")d6ed449afd("timekeeping: Make the MONOTONIC clock behave like the BOOTTIME clock")72199320d4("timekeeping: Add the new CLOCK_MONOTONIC_ACTIVE clock") As stated in the pull request for the unification of CLOCK_MONOTONIC and CLOCK_BOOTTIME, it was clear that we might have to revert the change. As reported by several folks systemd and other applications rely on the documented behaviour of CLOCK_MONOTONIC on Linux and break with the above changes. After resume daemons time out and other timeout related issues are observed. Rafael compiled this list: * systemd kills daemons on resume, after >WatchdogSec seconds of suspending (Genki Sky). [Verified that that's because systemd uses CLOCK_MONOTONIC and expects it to not include the suspend time.] * systemd-journald misbehaves after resume: systemd-journald[7266]: File /var/log/journal/016627c3c4784cd4812d4b7e96a34226/system.journal corrupted or uncleanly shut down, renaming and replacing. (Mike Galbraith). * NetworkManager reports "networking disabled" and networking is broken after resume 50% of the time (Pavel). [May be because of systemd.] * MATE desktop dims the display and starts the screensaver right after system resume (Pavel). * Full system hang during resume (me). [May be due to systemd or NM or both.] That happens on debian and open suse systems. It's sad, that these problems were neither catched in -next nor by those folks who expressed interest in this change. Reported-by: Rafael J. Wysocki <[email protected]> Reported-by: Genki Sky <[email protected]>, Reported-by: Pavel Machek <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Cc: Dmitry Torokhov <[email protected]> Cc: John Stultz <[email protected]> Cc: Jonathan Corbet <[email protected]> Cc: Kevin Easton <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Mark Salyzyn <[email protected]> Cc: Michael Kerrisk <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Petr Mladek <[email protected]> Cc: Prarit Bhargava <[email protected]> Cc: Sergey Senozhatsky <[email protected]> Cc: Steven Rostedt <[email protected]>
26 lines
661 B
C
26 lines
661 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _KERNEL_TIME_TIMEKEEPING_H
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#define _KERNEL_TIME_TIMEKEEPING_H
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/*
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* Internal interfaces for kernel/time/
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*/
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extern ktime_t ktime_get_update_offsets_now(unsigned int *cwsseq,
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ktime_t *offs_real,
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ktime_t *offs_boot,
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ktime_t *offs_tai);
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extern int timekeeping_valid_for_hres(void);
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extern u64 timekeeping_max_deferment(void);
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extern void timekeeping_warp_clock(void);
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extern int timekeeping_suspend(void);
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extern void timekeeping_resume(void);
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extern void do_timer(unsigned long ticks);
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extern void update_wall_time(void);
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extern seqlock_t jiffies_lock;
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#define CS_NAME_LEN 32
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#endif
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