Felix Moessbauer ed4fb6d7ef hrtimer: Use and report correct timerslack values for realtime tasks ... The timerslack_ns setting is used to specify how much the hardware timers should be delayed, to potentially dispatch multiple timers in a single interrupt. This is a performance optimization. Timers of realtime tasks (having a realtime scheduling policy) should not be delayed. This logic was inconsitently applied to the hrtimers, leading to delays of realtime tasks which used timed waits for events (e.g. condition variables). Due to the downstream override of the slack for rt tasks, the procfs reported incorrect (non-zero) timerslack_ns values. This is changed by setting the timer_slack_ns task attribute to 0 for all tasks with a rt policy. By that, downstream users do not need to specially handle rt tasks (w.r.t. the slack), and the procfs entry shows the correct value of "0". Setting non-zero slack values (either via procfs or PR_SET_TIMERSLACK) on tasks with a rt policy is ignored, as stated in "man 2 PR_SET_TIMERSLACK": Timer slack is not applied to threads that are scheduled under a real-time scheduling policy (see sched_setscheduler(2)). The special handling of timerslack on rt tasks in downstream users is removed as well. Signed-off-by: Felix Moessbauer <felix.moessbauer@siemens.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/all/20240814121032.368444-2-felix.moessbauer@siemens.com		2024-08-23 20:13:02 +02:00
..
9p
adfs	fs/adfs: add MODULE_DESCRIPTION	2024-07-18 09:50:08 +02:00
affs	affs: struct slink_front: Replace 1-element array with flexible array	2024-07-11 16:14:26 +02:00
afs	- 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN	2024-07-21 17:15:46 -07:00
autofs	vfs-6.11.mount.api	2024-07-15 11:31:32 -07:00
bcachefs	bcachefs fixes for 6.11-rc1	2024-07-22 10:59:08 -07:00
befs
bfs
btrfs	- 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN	2024-07-21 17:15:46 -07:00
cachefiles	cachefiles: Set the max subreq size for cache writes to MAX_RW_COUNT	2024-07-24 10:53:13 +02:00
ceph	A small patchset to address bogus I/O errors and ultimately an	2024-07-26 10:34:42 -07:00
coda
configfs
cramfs	vfs-6.11.module.description	2024-07-15 11:14:59 -07:00
crypto
debugfs	vfs-6.11.mount.api	2024-07-15 11:31:32 -07:00
devpts
dlm
ecryptfs
efivarfs	efivarfs: Convert to new uid/gid option parsing helpers	2024-07-02 06:21:18 +02:00
efs	vfs-6.11.module.description	2024-07-15 11:14:59 -07:00
erofs	erofs: convert comma to semicolon	2024-07-26 18:48:12 +08:00
exfat	Description for this pull request:	2024-07-17 12:53:47 -07:00
exportfs
ext2
ext4	Many cleanups and bug fixes in ext4, especially for the fast commit	2024-07-18 17:03:42 -07:00
f2fs	f2fs update for 6.11-rc1	2024-07-23 15:21:19 -07:00
fat	vfs-6.11.mount.api	2024-07-15 11:31:32 -07:00
freevxfs
fuse	virtio: features, fixes, cleanups	2024-07-19 11:57:55 -07:00
gfs2	gfs2: Clean up glock demote logic	2024-07-09 10:40:03 +02:00
hfs	vfs-6.11.module.description	2024-07-15 11:14:59 -07:00
hfsplus	vfs-6.11.misc	2024-07-15 10:52:51 -07:00
hostfs	vfs-6.11-rc1.fixes.3	2024-07-27 15:11:59 -07:00
hpfs	vfs-6.11.module.description	2024-07-15 11:14:59 -07:00
hugetlbfs	- 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN	2024-07-21 17:15:46 -07:00
iomap	vfs-6.11.iomap	2024-07-15 13:28:14 -07:00
isofs	\n	2024-07-17 13:11:42 -07:00
jbd2	jbd2: increase maximum transaction size	2024-07-08 23:59:37 -04:00
jffs2	Kbuild updates for v6.11	2024-07-23 14:32:21 -07:00
jfs	Folio conversion from Matthew Wilcox and a few various fixes	2024-07-23 15:15:16 -07:00
kernfs
lockd	lockd: Use *-y instead of *-objs in Makefile	2024-07-08 14:10:03 -04:00
minix	vfs-6.11.module.description	2024-07-15 11:14:59 -07:00
netfs	netfs: Fix writeback that needs to go to both server and cache	2024-07-24 10:53:13 +02:00
nfs	- 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN	2024-07-21 17:15:46 -07:00
nfs_common	fs: nfs: add missing MODULE_DESCRIPTION() macros	2024-07-08 13:47:24 -04:00
nfsd	NFSD 6.11 Release Notes	2024-07-17 12:00:49 -07:00
nilfs2	nilfs2: handle inconsistent state in nilfs_btnode_create_block()	2024-07-26 14:33:10 -07:00
nls
notify
ntfs3	ntfs3 changes for 6.11-rc1	2024-07-22 10:50:18 -07:00
ocfs2	- In the series "treewide: Refactor heap related implementation",	2024-07-21 17:56:22 -07:00
omfs
openpromfs
orangefs
overlayfs
proc	hrtimer: Use and report correct timerslack values for realtime tasks	2024-08-23 20:13:02 +02:00
pstore	memblock: updates for 6.11-rc1	2024-07-18 14:48:11 -07:00
qnx4
qnx6
quota	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
ramfs
reiserfs
romfs
smb	six smb3 client fixes	2024-07-27 20:08:07 -07:00
squashfs
sysfs
sysv
tests	execve: Move KUnit tests to tests/ subdirectory	2024-07-22 18:25:47 -07:00
tracefs	tracefs: Convert to new uid/gid option parsing helpers	2024-07-02 06:21:20 +02:00
ubifs	ubifs: add check for crypto_shash_tfm_digest	2024-07-12 22:01:09 +02:00
udf
ufs	- In the series "treewide: Refactor heap related implementation",	2024-07-21 17:56:22 -07:00
unicode
vboxsf	vfs-6.11.mount.api	2024-07-15 11:31:32 -07:00
verity
xfs	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
zonefs
aio.c	- 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN	2024-07-21 17:15:46 -07:00
anon_inodes.c
attr.c
backing-file.c
bad_inode.c
binfmt_elf_fdpic.c
binfmt_elf.c	execve fix for v6.11-rc1	2024-07-23 17:30:42 -07:00
binfmt_flat.c
binfmt_misc.c	vfs-6.11.module.description	2024-07-15 11:14:59 -07:00
binfmt_script.c
buffer.c	Many cleanups and bug fixes in ext4, especially for the fast commit	2024-07-18 17:03:42 -07:00
char_dev.c
compat_binfmt_elf.c
coredump.c	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
d_path.c
dax.c
dcache.c	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
direct-io.c
drop_caches.c	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
eventfd.c
eventpoll.c
exec.c	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
fcntl.c
fhandle.c
file_table.c	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
file.c
filesystems.c
fs_context.c
fs_parser.c	fs_parse: add uid & gid option option parsing helpers	2024-07-02 06:20:49 +02:00
fs_pin.c
fs_struct.c
fs_types.c
fs-writeback.c	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
fsopen.c
init.c
inode.c	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
internal.h	vfs-6.11.pidfs	2024-07-15 12:34:01 -07:00
ioctl.c
Kconfig
Kconfig.binfmt
kernel_read_file.c
libfs.c
locks.c	filelock: Fix fcntl/close race recovery compat path	2024-07-24 10:53:14 +02:00
Makefile
mbcache.c
mnt_idmapping.c
mount.h	vfs-6.11.mount	2024-07-15 11:54:04 -07:00
mpage.c
namei.c	vfs: correct the comments of vfs_*() helpers	2024-07-24 10:53:12 +02:00
namespace.c	fs: use all available ids	2024-07-24 10:53:13 +02:00
nsfs.c	nsfs: use cleanup guard	2024-07-18 09:50:08 +02:00
open.c	vfs-6.11.misc	2024-07-15 10:52:51 -07:00
pidfs.c	pidfs: handle kernels without namespaces cleanly	2024-07-24 10:53:13 +02:00
pipe.c	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
pnode.c
pnode.h
posix_acl.c
proc_namespace.c	fs: rename show_mnt_opts -> show_vfsmnt_opts	2024-06-28 14:36:43 +02:00
read_write.c
readdir.c
remap_range.c
select.c	hrtimer: Use and report correct timerslack values for realtime tasks	2024-08-23 20:13:02 +02:00
seq_file.c
signalfd.c	signal: Remove task argument from dequeue_signal()	2024-07-29 21:57:35 +02:00
splice.c
stack.c
stat.c	for-6.11/block-20240710	2024-07-15 14:20:22 -07:00
statfs.c
super.c	fs: don't allow non-init s_user_ns for filesystems without FS_USERNS_MOUNT	2024-07-27 09:56:33 +02:00
sync.c
sysctls.c
timerfd.c
userfaultfd.c	mm: provide mm_struct and address to huge_ptep_get()	2024-07-12 15:52:15 -07:00
utimes.c
xattr.c	vfs: Fix potential circular locking through setxattr() and removexattr()	2024-07-24 10:53:14 +02:00