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
..
ABI	CXL for v6.11 merge window	2024-07-28 09:33:28 -07:00
accel
accounting
admin-guide	profiling: remove profile=sleep support	2024-08-04 13:36:28 -07:00
arch	arm64: errata: Expand speculative SSBS workaround (again)	2024-08-01 16:11:28 +01:00
block
bpf
cdrom
core-api	Updates for the interrupt subsystem:	2024-07-22 13:52:05 -07:00
cpu-freq
crypto
dev-tools	- 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN	2024-07-21 17:15:46 -07:00
devicetree	dt-bindings: ata: rockchip-dwc-ahci: add missing power-domains	2024-07-29 09:04:09 +09:00
doc-guide
driver-api	thermal: core: Update thermal zone registration documentation	2024-08-02 13:22:37 +02:00
fault-injection
fb
features	LoongArch: Add ARCH_HAS_DEBUG_VM_PGTABLE support	2024-07-20 22:40:59 +08:00
filesystems	- 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN	2024-07-21 17:15:46 -07:00
firmware_class
firmware-guide
fpga
gpu
hid
hwmon
i2c
iio
images
infiniband
input
isdn
kbuild	kbuild: doc: gcc to CC change	2024-07-24 01:18:25 +09:00
kernel-hacking
leds
litmus-tests
livepatch
locking
maintainer
mhi
misc-devices
mm	- 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN	2024-07-21 17:15:46 -07:00
netlabel
netlink	ethtool: rss: echo the context number back	2024-07-25 16:23:47 -07:00
networking	ethtool: rss: echo the context number back	2024-07-25 16:23:47 -07:00
nvdimm
nvme
PCI
pcmcia
peci
power
process	Rust changes for v6.11	2024-07-27 13:44:54 -07:00
RCU
rust	Rust changes for v6.11	2024-07-27 13:44:54 -07:00
scheduler
scsi
security
sound
sphinx
sphinx-static
spi
staging
target
tee
timers
tools
trace
translations
usb
userspace-api	media: v4l: Fix missing tabular column hint for Y14P format	2024-07-30 08:36:29 +02:00
virt	* fix latent bug in how usage of large pages is determined for	2024-08-02 12:33:43 -04:00
w1
watchdog
wmi
.gitignore
atomic_bitops.txt
atomic_t.txt
Changes
CodingStyle
conf.py
docutils.conf
dontdiff
index.rst
Kconfig
Makefile
memory-barriers.txt
SubmittingPatches
subsystem-apis.rst