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| author | Thomas Gleixner <tglx@linutronix.de> | 2008-12-22 23:05:28 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-31 09:53:21 +0100 |
| commit | 1c5745aa380efb6417b5681104b007c8612fb496 (patch) | |
| tree | 263b81742f7973c0dd86efe414a79a324c0769e4 /kernel/sched_clock.c | |
| parent | 6a94cb73064c952255336cc57731904174b2c58f (diff) | |
| download | kernel-common-1c5745aa380efb6417b5681104b007c8612fb496.tar.gz kernel-common-1c5745aa380efb6417b5681104b007c8612fb496.tar.bz2 kernel-common-1c5745aa380efb6417b5681104b007c8612fb496.zip | |
sched_clock: prevent scd->clock from moving backwards, take #2
Redo:
5b7dba4: sched_clock: prevent scd->clock from moving backwards
which had to be reverted due to s2ram hangs:
ca7e716: Revert "sched_clock: prevent scd->clock from moving backwards"
... this time with resume restoring GTOD later in the sequence
taken into account as well.
The "timekeeping_suspended" flag is not very nice but we cannot call into
GTOD before it has been properly resumed and the scheduler will run very
early in the resume sequence.
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched_clock.c')
| -rw-r--r-- | kernel/sched_clock.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/sched_clock.c b/kernel/sched_clock.c index e8ab096ddfe3..a0b0852414cc 100644 --- a/kernel/sched_clock.c +++ b/kernel/sched_clock.c @@ -124,7 +124,7 @@ static u64 __update_sched_clock(struct sched_clock_data *scd, u64 now) clock = scd->tick_gtod + delta; min_clock = wrap_max(scd->tick_gtod, scd->clock); - max_clock = scd->tick_gtod + TICK_NSEC; + max_clock = wrap_max(scd->clock, scd->tick_gtod + TICK_NSEC); clock = wrap_max(clock, min_clock); clock = wrap_min(clock, max_clock); @@ -227,6 +227,9 @@ EXPORT_SYMBOL_GPL(sched_clock_idle_sleep_event); */ void sched_clock_idle_wakeup_event(u64 delta_ns) { + if (timekeeping_suspended) + return; + sched_clock_tick(); touch_softlockup_watchdog(); } |