[f2fs-dev] [Bug 216050] f2fs_gc occupies 100% cpu

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=216050

--- Comment #115 from Guido (guido.iodice@gmail.com) ---
(In reply to Thomas from comment #114)
> (In reply to Guido from comment #113)
> 
> Why not test the "f2fs_io_schedule_timeout" kernel patch in combination with
> running the manual GC script one time (doesn't seem to matter if you run
> this on unpatched or patched kernel, all that's important is that you boot
> without any garbage into the patched kernel, so reboot right after executing
> the script) ?
> 
> I did this cause I readed between the lines that this combination worked for
> others, too, and am having no more issues since around 5 days. And yes, I'm
> doing a lot to try to trigger this bug again.
> 
> Also is it save to assume that this issue only occurs on root partitions
> which are on NVMe drives? I see a pattern here but still not 100% sure.

I already tried the patch (but not in combination with the script) and it
solved the problem of 100% cpu but still f2fs_gc remains stuck and doesnt end
the garbage collection, so the user cant shutdown in a safe manner.

Anyway if I will have the 100% cpu problem in the following days, I'll try it.

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