Re: head -r331499 amd64/threadripper panic in vm_page_free_prep during "poudriere bulk -a", after 14h 22m or so.

From: Mark Johnston <markj_at_FreeBSD.org>
Date: Sun, 25 Mar 2018 16:09:34 -0400
On Sun, Mar 25, 2018 at 12:32:09PM -0700, Mark Millard wrote:
> On 2018-Mar-25, at 11:34 AM, Mark Johnston <markj at FreeBSD.org> wrote:
> 
> > On Sun, Mar 25, 2018 at 10:41:38AM -0700, Mark Millard wrote:
> >> FreeBSD panic'd while attempting to see if a "poudriere bulk -w -a"
> >> would get the "unnecessary swapping" problem in my UFS-only context,
> >> -r331499 (non-debug but with symbols), under Hyper-V. This is a
> >> Ryzen Threadripper context, but I've no clue if that is important
> >> to the problem. This was after 14 hours or so of building:
> >> 
> >> . . .
> >> [14:22:05] [18] [00:01:16] Finished devel/p5-Test-HTML-Tidy | p5-Test-HTML-Tidy-1.00_1: Success
> >> [14:22:08] [18] [00:00:00] Building devel/ocaml-camlp5 | ocaml-camlp5-6.16
> >> 
> >> So I've no clue if or how to repeat this.
> >> 
> >> Unfortunately dump was unsuccessful. 
> > 
> > What happened?
> 
> It reported:
> 
> (da1:strovsc1:0:0:0) WRITE(10). CDB 2a 00 35 24 37 c7 00 00 0 00
> (da1:storvsc1:0:0:0) CAM status Command timeout
> (da1:storvsc1:0:0:0) Error 5, Retries exhausted
> Aborting dump to to I/O error.
> 
> ** DUMP FAILED (ERROR 5) **
> = 0x5

Thanks. Do you happen to know if this occurs consistently under Hyper-V?

> >> So all I have is the
> >> backtrace. Hand typed from a screen shot of the console
> >> window:
> > 
> > Do you know what the panic message was? There are multiple calls to
> > panic() in vm_page_free_prep().
> 
> No. I listed what I could see. The console screen does not have many
> lines or rows and I was sleeping when the panic happened.

For future reference, you should be able to use "show panic" at the DDB
prompt to get the panic message.
Received on Sun Mar 25 2018 - 18:09:38 UTC

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