Tetsuo Handa b88f55389a profiling: remove profile=sleep support ... The kernel sleep profile is no longer working due to a recursive locking bug introduced by commit 42a20f86dc ("sched: Add wrapper for get_wchan() to keep task blocked") Booting with the 'profile=sleep' kernel command line option added or executing # echo -n sleep > /sys/kernel/profiling after boot causes the system to lock up. Lockdep reports kthreadd/3 is trying to acquire lock: ffff93ac82e08d58 (&p->pi_lock){....}-{2:2}, at: get_wchan+0x32/0x70 but task is already holding lock: ffff93ac82e08d58 (&p->pi_lock){....}-{2:2}, at: try_to_wake_up+0x53/0x370 with the call trace being lock_acquire+0xc8/0x2f0 get_wchan+0x32/0x70 __update_stats_enqueue_sleeper+0x151/0x430 enqueue_entity+0x4b0/0x520 enqueue_task_fair+0x92/0x6b0 ttwu_do_activate+0x73/0x140 try_to_wake_up+0x213/0x370 swake_up_locked+0x20/0x50 complete+0x2f/0x40 kthread+0xfb/0x180 However, since nobody noticed this regression for more than two years, let's remove 'profile=sleep' support based on the assumption that nobody needs this functionality. Fixes: 42a20f86dc ("sched: Add wrapper for get_wchan() to keep task blocked") Cc: stable@vger.kernel.org # v5.16+ Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2024-08-04 13:36:28 -07:00
..
acpi	Driver core changes for 6.11-rc1	2024-07-25 10:42:22 -07:00
asm-generic	runtime constants: deal with old decrepit linkers	2024-08-03 08:38:45 -07:00
clocksource
crypto
drm
dt-bindings	I3C for 6.11	2024-07-27 10:53:06 -07:00
keys
kunit	kunit: Introduce KUNIT_ASSERT_MEMEQ and KUNIT_ASSERT_MEMNEQ macros	2024-07-12 10:12:11 -06:00
kvm
linux	profiling: remove profile=sleep support	2024-08-04 13:36:28 -07:00
math-emu
media
memory
misc
net	sysctl: treewide: constify the ctl_table argument of proc_handlers	2024-07-24 20:59:29 +02:00
pcmcia
ras	mm/memory-failure: remove obsolete MF_MSG_DIFFERENT_COMPOUND	2024-07-12 15:52:22 -07:00
rdma
rv
scsi	Driver core changes for 6.11-rc1	2024-07-25 10:42:22 -07:00
soc	sound updates for 6.11-rc1	2024-07-19 12:39:34 -07:00
sound	sound fixes for 6.11-rc2	2024-08-02 09:04:57 -07:00
target
trace	Including fixes from wireless, bleutooth, BPF and netfilter.	2024-08-01 09:42:09 -07:00
uapi	uretprobe: change syscall number, again	2024-08-02 15:18:49 +02:00
ufs	scsi: ufs: core: Check LSDBS cap when !mcq	2024-07-15 22:51:06 -04:00
vdso	Random number generator updates for Linux 6.11-rc1.	2024-07-24 10:29:50 -07:00
video
xen	Driver core changes for 6.11-rc1	2024-07-25 10:42:22 -07:00