Kernel 6.1.39 -> top -> high wa > 20%
Nobody has claimed this yet.
Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 35/100
- Issue type
- Bug
- Clarity
- Mostly clear
- Activity status
- Stale
- Tech stack
- c, linux, raspberry-pi
- Domain
- embedded-iot, operating-systems
Research direction
Start by reproducing the reported behavior with top on a Raspberry Pi 4, comparing kernel 6.1.36 with 6.1.39 under the described Bookworm setup. Investigate the kernel change between those versions that affects reported I/O wait, then verify that wa returns toward 0 when the system is idle.
Written by the indexing model from the issue text.
Description
Describe the bug
Using Kernel 6.1.36 everything is working normal for me.
Using the top-command the wa-Parameter is switching from 0 to X and back to 0.
After upgrading to 6.1.39 the wa-Parameter is not going back to 0.
It always is over 20% (20-25%).
Steps to reproduce the behaviour
- select top with a kernel like 6.1.36 (is availabel for download).
- type top and look for the wa-parameter.
- install 6.1.39
- type top and look also for the wa-parameter.
Device (s)
Raspberry Pi 4 Mod. B
System
6.1.36:
Raspberry Pi reference 2020-05-27
Generated using pi-gen, https://github.com/RPi-Distro/pi-gen, 30e2dd32ba47cc3bec15ab1413c16a17e5797775, stage4
Apr 25 2023 18:26:03
Copyright (c) 2012 Broadcom
version d7f9c2b4ef7e4a8c0b04374a879ce89d7a948453 (clean) (release) (start)
Linux nextcloudpi.fritz.box 6.1.36-v8+ #1 SMP PREEMPT Fri Jun 30 13:03:56 UTC 2023 aarch64 GNU/Linux
Logs
No response
Additional context
running rpi4 with bookworm
- Dominant language
- C
- Stars
- 13.2k
- Forks
- 5.5k
- Avg merge
- 2d 21h
- Merged PRs (30d)
- 21
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