Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Pavankumar Kondeti 9db84311e7 tracing: rework sched_preempt_disable trace point implementation ... The current implementation of sched_preempt_disable trace point fails to detect the preemption disable time inside spin_lock_bh() and spin_unlock_bh(). This is because __local_bh_disable_ip() calls directly __preempt_count_add() which skips the preemption disable tracking. Instead of relying on the updates to preempt count, it is better to write the preemption disable tracking directly to preemptsoff tracer. This is similar to how irq disable tracking is done. The current code handles the false positives coming from __schedule() by directly resetting the time stamp. This requires an interface from the scheduler to preemptsoff tracer. To avoid this additional interface, the current patch detects the same condition by comparing the task pid and context switch count. If they are not matching at the time of preemption disable to enable, don't track the preemption disable time as it involved a context switch. Due to this rework. the sched_preempt_disable trace point location is changed to /sys/kernel/debug/tracing/events/preemptirq/sched_preempt_disable/enable Change-Id: I7f58d316b7c54bc7a54102bfeb678404bda010d4 Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org> [satyap@codeaurora.org: port to 5.4 and resolve trivial merge conflicts] Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>		2020-01-27 15:30:25 -08:00
..
bpf	ANDROID: bpf: validate bpf_func when BPF_JIT is enabled with CFI	2019-11-27 12:49:12 -08:00
cgroup	Merge android-5.4.5 (9cdc723) into msm-5.4	2020-01-23 04:00:53 -08:00
configs
debug	kgdb: don't use a notifier to enter kgdb at panic; call directly	2019-09-25 17:51:40 -07:00
dma	dma-mapping-fast: Clean up common code	2019-12-12 11:34:53 -08:00
events	Linux 5.4-rc8	2019-11-18 08:31:11 +01:00
gcov	um: Enable CONFIG_CONSTRUCTORS	2019-09-15 21:37:13 +02:00
irq	genirq: Honour IRQ's affinity hint during migration	2019-12-10 12:46:22 -08:00
livepatch	livepatch: Nullify obj->mod in klp_module_coming()'s error path	2019-08-19 13:03:37 +02:00
locking	Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"	2019-09-25 10:22:37 +02:00
power	power: em: correct increasing freq/power ratio	2019-12-04 16:27:56 -08:00
printk	Merge remote-tracking branch 'remotes/origin/tmp-935f8bc6f7aa' into msm-lahaina	2019-10-10 20:02:38 -07:00
rcu	Merge remote-tracking branch 'remotes/origin/tmp-935f8bc6f7aa' into msm-lahaina	2019-10-10 20:02:38 -07:00
sched	tracing: rework sched_preempt_disable trace point implementation	2020-01-27 15:30:25 -08:00
time	Merge android-5.4.5 (9cdc723) into msm-5.4	2020-01-23 04:00:53 -08:00
trace	tracing: rework sched_preempt_disable trace point implementation	2020-01-27 15:30:25 -08:00
.gitignore
acct.c
async.c
audit.c
audit.h
audit_fsnotify.c
audit_tree.c
audit_watch.c	audit_get_nd(): don't unlock parent too early	2019-11-10 11:56:55 -05:00
auditfilter.c
auditsc.c
backtracetest.c
bounds.c
capability.c
cfi.c	ANDROID: add support for Clang's Control Flow Integrity (CFI)	2019-11-27 12:49:12 -08:00
compat.c
configs.c	kernel/configs: Replace GPL boilerplate code with SPDX identifier	2019-07-30 18:34:15 +02:00
context_tracking.c
cpu.c	kernel: Add snapshot of changes to support cpu isolation	2019-12-10 12:42:32 -08:00
cpu_pm.c
crash_core.c
crash_dump.c
cred.c	Merge branch 'access-creds'	2019-07-25 08:36:29 -07:00
delayacct.c
dma.c
elfcore.c	kernel/elfcore.c: include proper prototypes	2019-09-25 17:51:39 -07:00
exec_domain.c
exit.c	Merge android-5.4.5 (9cdc723) into msm-5.4	2020-01-23 04:00:53 -08:00
extable.c	extable: Add function to search only kernel exception table	2019-08-21 22:23:48 +10:00
fail_function.c
fork.c	Merge android-5.4.5 (9cdc723) into msm-5.4	2020-01-23 04:00:53 -08:00
freezer.c	Revert "libata, freezer: avoid block device removal while system is frozen"	2019-10-06 09:11:37 -06:00
futex.c	futex: Prevent exit livelock	2019-11-29 10:10:14 +01:00
gen_kheaders.sh	kheaders: substituting --sort in archive creation	2019-10-17 09:08:19 +09:00
groups.c
hung_task.c
iomem.c
irq_work.c
jump_label.c	jump_label: Don't warn on __exit jump entries	2019-08-29 15:10:10 +01:00
kallsyms.c	kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol	2019-08-27 16:19:56 +01:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt	sched/rt, Kconfig: Unbreak def/oldconfig with CONFIG_PREEMPT=y	2019-07-22 18:05:11 +02:00
kcov.c
kexec.c	kexec_load: Disable at runtime if the kernel is locked down	2019-08-19 21:54:15 -07:00
kexec_core.c	kexec: bail out upon SIGKILL when allocating memory.	2019-09-25 17:51:40 -07:00
kexec_elf.c	kexec_elf: support 32 bit ELF files	2019-09-06 23:58:44 +02:00
kexec_file.c	Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2019-09-28 08:14:15 -07:00
kexec_internal.h
kheaders.c
kmod.c
kprobes.c	Tracing updates:	2019-09-20 11:19:48 -07:00
ksysfs.c
kthread.c	kthread: make __kthread_queue_delayed_work static	2019-10-16 09:20:58 -07:00
latencytop.c
Makefile	ANDROID: add support for Clang's Control Flow Integrity (CFI)	2019-11-27 12:49:12 -08:00
module-internal.h
module.c	ANDROID: add support for Clang's Control Flow Integrity (CFI)	2019-11-27 12:49:12 -08:00
module_signature.c	MODSIGN: Export module signature definitions	2019-08-05 18:39:56 -04:00
module_signing.c	MODSIGN: Export module signature definitions	2019-08-05 18:39:56 -04:00
notifier.c
nsproxy.c
padata.c	padata: remove cpu_index from the parallel_queue	2019-09-13 21:15:41 +10:00
panic.c	panic: ensure preemption is disabled during panic()	2019-10-07 15:47:19 -07:00
params.c	lockdown: Lock down module params that specify hardware parameters (eg. ioport)	2019-08-19 21:54:16 -07:00
pid.c	kernel/pid.c: convert struct pid count to refcount_t	2019-07-16 19:23:24 -07:00
pid_namespace.c	proc/sysctl: add shared variables for range check	2019-07-18 17:08:07 -07:00
profile.c
ptrace.c	ptrace: add PTRACE_GET_SYSCALL_INFO request	2019-07-16 19:23:24 -07:00
range.c
reboot.c	FROMLIST: reboot: Export reboot_mode	2019-11-25 11:46:31 -08:00
relay.c
resource.c	mm/memory_hotplug.c: use PFN_UP / PFN_DOWN in walk_system_ram_range()	2019-09-24 15:54:09 -07:00
rseq.c
scs.c	FROMLIST: scs: add support for stack usage debugging	2019-11-27 12:49:09 -08:00
seccomp.c
signal.c	Merge "mm: oom_kill: reap memory of a task that receives SIGKILL"	2019-12-17 16:36:52 -08:00
smp.c	kernel: Add snapshot of changes to support cpu isolation	2019-12-10 12:42:32 -08:00
smpboot.c
smpboot.h
softirq.c	Revert "softirq: Let ksoftirqd do its job"	2019-12-10 12:46:30 -08:00
stackleak.c
stacktrace.c	stacktrace: Don't skip first entry on noncurrent tasks	2019-11-04 21:19:25 +01:00
stop_machine.c	stop_machine: Avoid potential race behaviour	2019-10-17 12:47:12 +02:00
sys.c	Merge Linus's 5.4-rc1-prerelease branch into android-mainline	2019-09-20 16:07:54 -07:00
sys_ni.c
sysctl.c	tracing: rework sched_preempt_disable trace point implementation	2020-01-27 15:30:25 -08:00
sysctl_binary.c
task_work.c
taskstats.c
test_kprobes.c
torture.c	torture: Remove exporting of internal functions	2019-08-01 14:30:22 -07:00
tracepoint.c	The main changes in this release include:	2019-07-18 11:51:00 -07:00
tsacct.c
ucount.c	proc/sysctl: add shared variables for range check	2019-07-18 17:08:07 -07:00
uid16.c
uid16.h
umh.c
up.c
user-return-notifier.c
user.c	Linus 5.3-rc1	2019-07-23 16:21:59 -07:00
user_namespace.c
utsname.c
utsname_sysctl.c
watchdog.c	watchdog: use per_cpu_ptr() in watchdog_disable()	2019-12-10 12:46:40 -08:00
watchdog_hld.c
workqueue.c	Merge android-5.4.5 (9cdc723) into msm-5.4	2020-01-23 04:00:53 -08:00
workqueue_internal.h