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2004cef11e
- Implement the SCHED_DEADLINE server infrastructure - Daniel Bristot de Oliveira's
last major contribution to the kernel:
"SCHED_DEADLINE servers can help fixing starvation issues of low priority
tasks (e.g., SCHED_OTHER) when higher priority tasks monopolize CPU
cycles. Today we have RT Throttling; DEADLINE servers should be able to
replace and improve that."
(Daniel Bristot de Oliveira, Peter Zijlstra, Joel Fernandes,
Youssef Esmat, Huang Shijie)
- Preparatory changes for sched_ext integration:
- Use set_next_task(.first) where required
- Fix up set_next_task() implementations
- Clean up DL server vs. core sched
- Split up put_prev_task_balance()
- Rework pick_next_task()
- Combine the last put_prev_task() and the first set_next_task()
- Rework dl_server
- Add put_prev_task(.next)
(Peter Zijlstra, with a fix by Tejun Heo)
- Complete the EEVDF transition and refine EEVDF scheduling:
- Implement delayed dequeue
- Allow shorter slices to wakeup-preempt
- Use sched_attr::sched_runtime to set request/slice suggestion
- Document the new feature flags
- Remove unused and duplicate-functionality fields
- Simplify & unify pick_next_task_fair()
- Misc debuggability enhancements
(Peter Zijlstra, with fixes/cleanups by Dietmar Eggemann,
Valentin Schneider and Chuyi Zhou)
- Initialize the vruntime of a new task when it is first enqueued,
resulting in significant decrease in latency of newly woken tasks.
(Zhang Qiao)
- Introduce SM_IDLE and an idle re-entry fast-path in __schedule()
(K Prateek Nayak, Peter Zijlstra)
- Clean up and clarify the usage of Clean up usage of rt_task()
(Qais Yousef)
- Preempt SCHED_IDLE entities in strict cgroup hierarchies
(Tianchen Ding)
- Clarify the documentation of time units for deadline scheduler
parameters. (Christian Loehle)
- Remove the HZ_BW chicken-bit feature flag introduced a year ago,
the original change seems to be working fine.
(Phil Auld)
- Misc fixes and cleanups (Chen Yu, Dan Carpenter, Huang Shijie,
Peilin He, Qais Yousefm and Vincent Guittot)
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'sched-core-2024-09-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
- Implement the SCHED_DEADLINE server infrastructure - Daniel Bristot
de Oliveira's last major contribution to the kernel:
"SCHED_DEADLINE servers can help fixing starvation issues of low
priority tasks (e.g., SCHED_OTHER) when higher priority tasks
monopolize CPU cycles. Today we have RT Throttling; DEADLINE
servers should be able to replace and improve that."
(Daniel Bristot de Oliveira, Peter Zijlstra, Joel Fernandes, Youssef
Esmat, Huang Shijie)
- Preparatory changes for sched_ext integration:
- Use set_next_task(.first) where required
- Fix up set_next_task() implementations
- Clean up DL server vs. core sched
- Split up put_prev_task_balance()
- Rework pick_next_task()
- Combine the last put_prev_task() and the first set_next_task()
- Rework dl_server
- Add put_prev_task(.next)
(Peter Zijlstra, with a fix by Tejun Heo)
- Complete the EEVDF transition and refine EEVDF scheduling:
- Implement delayed dequeue
- Allow shorter slices to wakeup-preempt
- Use sched_attr::sched_runtime to set request/slice suggestion
- Document the new feature flags
- Remove unused and duplicate-functionality fields
- Simplify & unify pick_next_task_fair()
- Misc debuggability enhancements
(Peter Zijlstra, with fixes/cleanups by Dietmar Eggemann, Valentin
Schneider and Chuyi Zhou)
- Initialize the vruntime of a new task when it is first enqueued,
resulting in significant decrease in latency of newly woken tasks
(Zhang Qiao)
- Introduce SM_IDLE and an idle re-entry fast-path in __schedule()
(K Prateek Nayak, Peter Zijlstra)
- Clean up and clarify the usage of Clean up usage of rt_task()
(Qais Yousef)
- Preempt SCHED_IDLE entities in strict cgroup hierarchies
(Tianchen Ding)
- Clarify the documentation of time units for deadline scheduler
parameters (Christian Loehle)
- Remove the HZ_BW chicken-bit feature flag introduced a year ago,
the original change seems to be working fine (Phil Auld)
- Misc fixes and cleanups (Chen Yu, Dan Carpenter, Huang Shijie,
Peilin He, Qais Yousefm and Vincent Guittot)
* tag 'sched-core-2024-09-19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (64 commits)
sched/cpufreq: Use NSEC_PER_MSEC for deadline task
cpufreq/cppc: Use NSEC_PER_MSEC for deadline task
sched/deadline: Clarify nanoseconds in uapi
sched/deadline: Convert schedtool example to chrt
sched/debug: Fix the runnable tasks output
sched: Fix sched_delayed vs sched_core
kernel/sched: Fix util_est accounting for DELAY_DEQUEUE
kthread: Fix task state in kthread worker if being frozen
sched/pelt: Use rq_clock_task() for hw_pressure
sched/fair: Move effective_cpu_util() and effective_cpu_util() in fair.c
sched/core: Introduce SM_IDLE and an idle re-entry fast-path in __schedule()
sched: Add put_prev_task(.next)
sched: Rework dl_server
sched: Combine the last put_prev_task() and the first set_next_task()
sched: Rework pick_next_task()
sched: Split up put_prev_task_balance()
sched: Clean up DL server vs core sched
sched: Fixup set_next_task() implementations
sched: Use set_next_task(.first) where required
sched/fair: Properly deactivate sched_delayed task upon class change
...
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| .. | ||
| acl.c | ||
| acl.h | ||
| alloc_background_format.h | ||
| alloc_background.c | ||
| alloc_background.h | ||
| alloc_foreground.c | ||
| alloc_foreground.h | ||
| alloc_types.h | ||
| backpointers.c | ||
| backpointers.h | ||
| bbpos_types.h | ||
| bbpos.h | ||
| bcachefs_format.h | ||
| bcachefs_ioctl.h | ||
| bcachefs.h | ||
| bkey_buf.h | ||
| bkey_cmp.h | ||
| bkey_methods.c | ||
| bkey_methods.h | ||
| bkey_sort.c | ||
| bkey_sort.h | ||
| bkey_types.h | ||
| bkey.c | ||
| bkey.h | ||
| bset.c | ||
| bset.h | ||
| btree_cache.c | ||
| btree_cache.h | ||
| btree_gc_types.h | ||
| btree_gc.c | ||
| btree_gc.h | ||
| btree_io.c | ||
| btree_io.h | ||
| btree_iter.c | ||
| btree_iter.h | ||
| btree_journal_iter.c | ||
| btree_journal_iter.h | ||
| btree_key_cache_types.h | ||
| btree_key_cache.c | ||
| btree_key_cache.h | ||
| btree_locking.c | ||
| btree_locking.h | ||
| btree_node_scan_types.h | ||
| btree_node_scan.c | ||
| btree_node_scan.h | ||
| btree_trans_commit.c | ||
| btree_types.h | ||
| btree_update_interior.c | ||
| btree_update_interior.h | ||
| btree_update.c | ||
| btree_update.h | ||
| btree_write_buffer_types.h | ||
| btree_write_buffer.c | ||
| btree_write_buffer.h | ||
| buckets_types.h | ||
| buckets_waiting_for_journal_types.h | ||
| buckets_waiting_for_journal.c | ||
| buckets_waiting_for_journal.h | ||
| buckets.c | ||
| buckets.h | ||
| chardev.c | ||
| chardev.h | ||
| checksum.c | ||
| checksum.h | ||
| clock_types.h | ||
| clock.c | ||
| clock.h | ||
| compress.c | ||
| compress.h | ||
| darray.c | ||
| darray.h | ||
| data_update.c | ||
| data_update.h | ||
| debug.c | ||
| debug.h | ||
| dirent_format.h | ||
| dirent.c | ||
| dirent.h | ||
| disk_accounting_format.h | ||
| disk_accounting_types.h | ||
| disk_accounting.c | ||
| disk_accounting.h | ||
| disk_groups_format.h | ||
| disk_groups_types.h | ||
| disk_groups.c | ||
| disk_groups.h | ||
| ec_format.h | ||
| ec_types.h | ||
| ec.c | ||
| ec.h | ||
| errcode.c | ||
| errcode.h | ||
| error.c | ||
| error.h | ||
| extent_update.c | ||
| extent_update.h | ||
| extents_format.h | ||
| extents_types.h | ||
| extents.c | ||
| extents.h | ||
| eytzinger.c | ||
| eytzinger.h | ||
| fifo.h | ||
| fs-common.c | ||
| fs-common.h | ||
| fs-io-buffered.c | ||
| fs-io-buffered.h | ||
| fs-io-direct.c | ||
| fs-io-direct.h | ||
| fs-io-pagecache.c | ||
| fs-io-pagecache.h | ||
| fs-io.c | ||
| fs-io.h | ||
| fs-ioctl.c | ||
| fs-ioctl.h | ||
| fs.c | ||
| fs.h | ||
| fsck.c | ||
| fsck.h | ||
| inode_format.h | ||
| inode.c | ||
| inode.h | ||
| io_misc.c | ||
| io_misc.h | ||
| io_read.c | ||
| io_read.h | ||
| io_write_types.h | ||
| io_write.c | ||
| io_write.h | ||
| journal_io.c | ||
| journal_io.h | ||
| journal_reclaim.c | ||
| journal_reclaim.h | ||
| journal_sb.c | ||
| journal_sb.h | ||
| journal_seq_blacklist_format.h | ||
| journal_seq_blacklist.c | ||
| journal_seq_blacklist.h | ||
| journal_types.h | ||
| journal.c | ||
| journal.h | ||
| Kconfig | ||
| keylist_types.h | ||
| keylist.c | ||
| keylist.h | ||
| logged_ops_format.h | ||
| logged_ops.c | ||
| logged_ops.h | ||
| lru_format.h | ||
| lru.c | ||
| lru.h | ||
| Makefile | ||
| mean_and_variance_test.c | ||
| mean_and_variance.c | ||
| mean_and_variance.h | ||
| migrate.c | ||
| migrate.h | ||
| move_types.h | ||
| move.c | ||
| move.h | ||
| movinggc.c | ||
| movinggc.h | ||
| nocow_locking_types.h | ||
| nocow_locking.c | ||
| nocow_locking.h | ||
| opts.c | ||
| opts.h | ||
| printbuf.c | ||
| printbuf.h | ||
| quota_format.h | ||
| quota_types.h | ||
| quota.c | ||
| quota.h | ||
| rebalance_types.h | ||
| rebalance.c | ||
| rebalance.h | ||
| recovery_passes_types.h | ||
| recovery_passes.c | ||
| recovery_passes.h | ||
| recovery.c | ||
| recovery.h | ||
| reflink_format.h | ||
| reflink.c | ||
| reflink.h | ||
| replicas_format.h | ||
| replicas_types.h | ||
| replicas.c | ||
| replicas.h | ||
| sb-clean.c | ||
| sb-clean.h | ||
| sb-counters_format.h | ||
| sb-counters.c | ||
| sb-counters.h | ||
| sb-downgrade_format.h | ||
| sb-downgrade.c | ||
| sb-downgrade.h | ||
| sb-errors_format.h | ||
| sb-errors_types.h | ||
| sb-errors.c | ||
| sb-errors.h | ||
| sb-members_format.h | ||
| sb-members_types.h | ||
| sb-members.c | ||
| sb-members.h | ||
| seqmutex.h | ||
| siphash.c | ||
| siphash.h | ||
| six.c | ||
| six.h | ||
| snapshot_format.h | ||
| snapshot.c | ||
| snapshot.h | ||
| str_hash.h | ||
| subvolume_format.h | ||
| subvolume_types.h | ||
| subvolume.c | ||
| subvolume.h | ||
| super_types.h | ||
| super-io.c | ||
| super-io.h | ||
| super.c | ||
| super.h | ||
| sysfs.c | ||
| sysfs.h | ||
| tests.c | ||
| tests.h | ||
| thread_with_file_types.h | ||
| thread_with_file.c | ||
| thread_with_file.h | ||
| time_stats.c | ||
| time_stats.h | ||
| trace.c | ||
| trace.h | ||
| two_state_shared_lock.c | ||
| two_state_shared_lock.h | ||
| util.c | ||
| util.h | ||
| varint.c | ||
| varint.h | ||
| vstructs.h | ||
| xattr_format.h | ||
| xattr.c | ||
| xattr.h | ||