swap_pager: indefinite wait buffer (solved?)

[Luciano Mannucci]

On Thu, 27 Feb 2020 12:30:06 +0100
Luciano Mannucci <luciano at vespaperitivo.it> wrote:

> In the daily security report of one of my PPC 64 virtual server, that
> runs under KVM/Qemu, which says:
> 
> Feb 26 20:17:53 Saguaro kernel: swap_pager: indefinite wait buffer: bufobj:
> 0, blkno: 1698063, size: 20480
The issue started just after adding 4 virtual CPUs to the machine.
Adding more ram solved the issue.

I had 4 CPUs 8 Gig, problem raised with 8 CPUS 8 Gig, now I have 8 CPUs
and 12 Gigs - no problem: the machine swaps a bit, but no errors.

There might be a small bug in the kernel, but I think it is not worth
the investigation for a 11.3 release. Or maybe in qemu fake scsi api...

In any case, the discussion should belong to virtualization mailing-list.

Sorry for the noise,

Luciano.  
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