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- Various preparatory cleanups & enhancements of the timer-wheel code,
in preparation for the WIP 'pull timers at expiry' timer migration model
series (which will replace the current 'push timers at enqueue' migration
model), by Anna-Maria Behnsen:
- Update comments and clean up confusing variable names
- Add debug check to warn about time travel
- Improve/expand timer-wheel tracepoints
- Optimize away unnecessary IPIs for deferrable timers
- Restructure & clean up next_expiry_recalc()
- Clean up forward_timer_base()
- Introduce __forward_timer_base() and use it to simplify
and micro-optimize get_next_timer_interrupt()
- Restructure the get_next_timer_interrupt()'s idle logic
for better readability and to enable a minor optimization.
- Fix the nextevt calculation when no timers are pending
- Fix the sysfs_get_uname() prototype declaration
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'timers-core-2024-01-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer subsystem updates from Ingo Molnar:
- Various preparatory cleanups & enhancements of the timer-wheel code,
in preparation for the WIP 'pull timers at expiry' timer migration
model series (which will replace the current 'push timers at enqueue'
migration model), by Anna-Maria Behnsen:
- Update comments and clean up confusing variable names
- Add debug check to warn about time travel
- Improve/expand timer-wheel tracepoints
- Optimize away unnecessary IPIs for deferrable timers
- Restructure & clean up next_expiry_recalc()
- Clean up forward_timer_base()
- Introduce __forward_timer_base() and use it to simplify and
micro-optimize get_next_timer_interrupt()
- Restructure the get_next_timer_interrupt()'s idle logic for better
readability and to enable a minor optimization.
- Fix the nextevt calculation when no timers are pending
- Fix the sysfs_get_uname() prototype declaration
* tag 'timers-core-2024-01-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
timers: Fix nextevt calculation when no timers are pending
timers: Rework idle logic
timers: Use already existing function for forwarding timer base
timers: Split out forward timer base functionality
timers: Clarify check in forward_timer_base()
timers: Move store of next event into __next_timer_interrupt()
timers: Do not IPI for deferrable timers
tracing/timers: Add tracepoint for tracking timer base is_idle flag
tracing/timers: Enhance timer_start tracepoint
tick-sched: Warn when next tick seems to be in the past
tick/sched: Cleanup confusing variables
tick-sched: Fix function names in comments
time: Make sysfs_get_uname() function visible in header
f24dc33f8e