BJP
n00b
Joined: 01 Sep 2023
Posts: 1
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 Posted: Fri Sep 01, 2023 9:11 pm Post subject: gentoo-sources-6.5.0 high load when idle with CIFS mounted |
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Does anyone else who has updated to gentoo-sources-6.5.0 see high load average on an idle system when a CIFS volume is mounted? My system maintains a load average of about 0.3 to 0.6 when lightly used and only background services are running. As soon as I mount a network CIFS volume the load will climb above 2 and stay there forever, even if I stop everything else running on the system.
| Code: | # uptime
17:10:21 up 6:16, 1 user, load average: 2.08, 2.14, 2.02
# top -bn2 | grep '%Cpu' | tail -1 | grep -P '(....|...) id,'|awk '{print "CPU Usage: " 100-$8 "%"}'
CPU Usage: 0.5% |
Immediately upon mounting a CIFS volume I see two kernel threads sitting in "D" state:
| Code: | # ps aux | grep cifsd
root 17466 0.0 0.0 0 0 ? S 16:52 0:00 [cifsd]
root 17467 0.0 0.0 0 0 ? D 16:52 0:00 [cifsd-cfid-laundromat]
root 17468 0.0 0.0 0 0 ? D 16:52 0:00 [cifsd-cfid-laundromat] |
The cifsd-cfid-laundromat thread was added in 6.5.0 (https://lore.kernel.org/linux-cifs/CAH2r5mt5gt8E1riGaoPVs1o40ssFDpuv2CAL-wMz8ucGBJMamg@mail.gmail.com/T/), the issue does not exist in kernel 6.4.12 or any other kernel I've used.
If I unmount the CIFS volume, those laundromat threads disappear and the load falls back down to 0.
fstab entry for the CIFS volume:
| Code: | //host/sharename /mnt/public cifs noperm,guest,vers=3.02 0 2
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Mostly I'm wondering if anyone else is seeing this, if it's appropriate to report up to LKML, if a Gentoo bug should be opened, or what.
Thanks. |
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Kernel & Hardware
