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Peter Zijlstra 8c79a045fd sched/events: Revert trace_sched_stat_sleeptime() ... Commit 1ac9bc69 ("sched/tracing: Add a new tracepoint for sleeptime") added a new sched:sched_stat_sleeptime tracepoint. It's broken: the first sample we get on a task might be bad because of a stale sleep_start value that wasn't reset at the last task switch because the tracepoint was not active. It also breaks the existing schedstat samples due to the side effects of: - se->statistics.sleep_start = 0; ... - se->statistics.block_start = 0; Nor do I see means to fix it without adding overhead to the scheduler fast path, which I'm not willing to for the sake of redundant instrumentation. Most importantly, sleep time information can already be constructed by tracing context switches and wakeups, and taking the timestamp difference between the schedule-out, the wakeup and the schedule-in. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Andrew Vagin <avagin@openvz.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/n/tip-pc4c9qhl8q6vg3bs4j6k0rbd@git.kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>		13 years ago
..
9p.h	net/9p: Convert net/9p protocol dumps to tracepoints	13 years ago
asoc.h	ASoC: Add another DAPM stat for neighbour checks	14 years ago
block.h	blktrace: add FLUSH/FUA support	14 years ago
btrfs.h	Btrfs: space leak tracepoints	13 years ago
compaction.h	…
ext3.h	ext3: Add fixed tracepoints	14 years ago
ext4.h	ext4: do not reference pa_inode from group_pa	13 years ago
gfpflags.h	mm: tracing: add missing GFP flags to tracing	14 years ago
gpio.h	gpio: add trace events for setting direction and value	14 years ago
irq.h	rcu: Use softirq to address performance regression	14 years ago
jbd.h	jbd: Add fixed tracepoints	14 years ago
jbd2.h	jbd2: remove jbd2_dev_to_name() from jbd2 tracepoints	14 years ago
kmem.h	mm-tracepoint: rename page-free events	13 years ago
kvm.h	…
lock.h	…
mce.h	…
module.h	include: replace linux/module.h with "struct module" wherever possible	13 years ago
napi.h	…
net.h	net: tracepoint of net_dev_xmit sees freed skb and causes panic	14 years ago
oom.h	tracepoint: add tracepoints for debugging oom_score_adj	13 years ago
power.h	…
rcu.h	rcu: Augment rcu_batch_end tracing for idle and callback state	13 years ago
regmap.h	regmap: Add trace event for successful cache reads	13 years ago
regulator.h	…
rpm.h	PM / Runtime: Introduce trace points for tracing rpm_* functions	14 years ago
sched.h	sched/events: Revert trace_sched_stat_sleeptime()	13 years ago
scsi.h	…
signal.h	…
skb.h	…
sock.h	core: add tracepoints for queueing skb to rcvbuf	14 years ago
syscalls.h	…
task.h	tracepoint: add tracepoints for debugging oom_score_adj	13 years ago
timer.h	…
udp.h	udp: add tracepoints for queueing skb to rcvbuf	14 years ago
vmscan.h	vmscan/trace: Add 'file' info to trace_mm_vmscan_lru_isolate()	13 years ago
workqueue.h	…
writeback.h	writeback: fix dereferencing NULL bdi->dev on trace_writeback_queue	13 years ago
xen.h	xen/tracing: fix compile errors when tracing is disabled.	14 years ago