Josh Don a803c35d0b fs/proc/uptime.c: Fix idle time reporting in /proc/uptime ... [ Upstream commit a130e8fbc7 ] /proc/uptime reports idle time by reading the CPUTIME_IDLE field from the per-cpu kcpustats. However, on NO_HZ systems, idle time is not continually updated on idle cpus, leading this value to appear incorrectly small. /proc/stat performs an accounting update when reading idle time; we can use the same approach for uptime. With this patch, /proc/stat and /proc/uptime now agree on idle time. Additionally, the following shows idle time tick up consistently on an idle machine: (while true; do cat /proc/uptime; sleep 1; done) | awk '{print $2-prev; prev=$2}' Reported-by: Luigi Rizzo <lrizzo@google.com> Signed-off-by: Josh Don <joshdon@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Eric Dumazet <edumazet@google.com> Link: https://lkml.kernel.org/r/20210827165438.3280779-1-joshdon@google.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-11-18 19:16:13 +01:00
..
acpi	ACPI: tools: fix compilation error	2021-10-07 19:18:19 +02:00
asm-generic	asm-generic: build fixes for v5.15	2021-10-08 11:57:54 -07:00
clocksource	…
crypto	…
drm	…
dt-bindings	linux-watchdog 5.15-rc1 tag	2021-09-07 13:52:46 -07:00
keys	…
kunit	kunit: fix kernel-doc warnings due to mismatched arg names	2021-10-06 17:54:07 -06:00
kvm	KVM: arm64: Fix PMU probe ordering	2021-09-20 12:43:34 +01:00
linux	fs/proc/uptime.c: Fix idle time reporting in /proc/uptime	2021-11-18 19:16:13 +01:00
math-emu	…
media	media: videobuf2: rework vb2_mem_ops API	2021-11-18 19:16:13 +01:00
memory	memory: renesas-rpc-if: Correct QSPI data transfer in Manual mode	2021-11-18 19:16:01 +01:00
misc	…
net	net: sched: update default qdisc visibility after Tx queue cnt changes	2021-11-18 19:16:10 +01:00
pcmcia	…
ras	…
rdma	…
scsi	scsi: core: Avoid leaving shost->last_reset with stale value if EH does not run	2021-11-18 19:15:51 +01:00
soc	net: dsa: tag_ocelot_8021q: break circular dependency with ocelot switch lib	2021-10-12 17:35:18 -07:00
sound	ALSA: hda: intel: Allow repeatedly probing on codec configuration errors	2021-10-07 09:15:22 +02:00
target	…
trace	block-5.15-2021-10-17	2021-10-17 19:25:20 -10:00
uapi	signal: Add SA_IMMUTABLE to ensure forced siganls do not get changed	2021-11-18 19:16:01 +01:00
vdso	…
video	…
xen	xen/privcmd: drop "pages" parameter from xen_remap_pfn()	2021-10-05 08:20:27 +02:00