Bug 208833
| Summary: | applying HFSC causes soft lockup | ||
|---|---|---|---|
| Product: | Networking | Reporter: | code |
| Component: | Other | Assignee: | Stephen Hemminger (stephen) |
| Status: | NEW --- | ||
| Severity: | normal | CC: | code |
| Priority: | P1 | ||
| Hardware: | x86-64 | ||
| OS: | Linux | ||
| Kernel Version: | 5.7 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Attachments: |
example of my regular tc script
dmesg from 5.9.1 kernel |
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Created attachment 293067 [details]
dmesg from 5.9.1 kernel
was finally able to catch some log from 5.9.1 kernel
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Created attachment 290795 [details] example of my regular tc script Applying and reapplying HFSC qdisc to interface with heavy load often causes soft lockup (in random processes, in short time after applying qdisc). Stack trace was somewhat uninformative and hard to get. I mostly observe this with torrent client on PPPOE client interface when run attached script several times. Will attach dmesg as soon as i will be able to reliably get it. I tried to bisect bug, but stopped at some old kernel that won't even boot with my config. So the problem could be old but unnoticed.