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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-04-28 12:11:26 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-04-28 12:11:26 -0700 |
| commit | 245c8e81741b51fe1281964e4a6525311be6858f (patch) | |
| tree | 6013a2b56b925b7fad072f896f7503deb59a746f /Documentation | |
| parent | aec147c18856fa7115e14b9ad6a91c3ed2cf2e19 (diff) | |
| parent | 257bf89d84121280904800acd25cc2c444c717ae (diff) | |
| download | linux-245c8e81741b51fe1281964e4a6525311be6858f.tar.gz | |
Merge tag 'sched-urgent-2024-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:
- Fix EEVDF corner cases
- Fix two nohz_full= related bugs that can cause boot crashes
and warnings
* tag 'sched-urgent-2024-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/isolation: Fix boot crash when maxcpus < first housekeeping CPU
sched/isolation: Prevent boot crash when the boot CPU is nohz_full
sched/eevdf: Prevent vlag from going out of bounds in reweight_eevdf()
sched/eevdf: Fix miscalculation in reweight_entity() when se is not curr
sched/eevdf: Always update V if se->on_rq when reweighting
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/timers/no_hz.rst | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/Documentation/timers/no_hz.rst b/Documentation/timers/no_hz.rst index f8786be15183c..7fe8ef9718d8e 100644 --- a/Documentation/timers/no_hz.rst +++ b/Documentation/timers/no_hz.rst @@ -129,11 +129,8 @@ adaptive-tick CPUs: At least one non-adaptive-tick CPU must remain online to handle timekeeping tasks in order to ensure that system calls like gettimeofday() returns accurate values on adaptive-tick CPUs. (This is not an issue for CONFIG_NO_HZ_IDLE=y because there are no running -user processes to observe slight drifts in clock rate.) Therefore, the -boot CPU is prohibited from entering adaptive-ticks mode. Specifying a -"nohz_full=" mask that includes the boot CPU will result in a boot-time -error message, and the boot CPU will be removed from the mask. Note that -this means that your system must have at least two CPUs in order for +user processes to observe slight drifts in clock rate.) Note that this +means that your system must have at least two CPUs in order for CONFIG_NO_HZ_FULL=y to do anything for you. Finally, adaptive-ticks CPUs must have their RCU callbacks offloaded. |