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Re: kern/52199 (vioscsi kernel panic on a KVM hypervisor)
The following reply was made to PR kern/52199; it has been noted by GNATS.
From: =?UTF-8?B?SmFyb23DrXIgRG9sZcSNZWs=?= <jaromir.dolecek%gmail.com@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: code%boerschig.net@localhost
Subject: Re: kern/52199 (vioscsi kernel panic on a KVM hypervisor)
Date: Sun, 14 May 2017 22:24:06 +0200
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Content-Type: text/plain; charset="UTF-8"
Could you please transcribe the kernel messages which appear just before
the resource shortages? It should something along '%s: error %d loading DMA
map' or 'error reserving %d (nsegs %d)'.
Jaromir
2017-05-14 21:25 GMT+02:00 MB <code%boerschig.net@localhost>:
> The following reply was made to PR kern/52199; it has been noted by GNATS.
>
> From: MB <code%boerschig.net@localhost>
> To: gnats-bugs%NetBSD.org@localhost
> Cc:
> Subject: Re: kern/52199 (vioscsi kernel panic on a KVM hypervisor)
> Date: Sun, 14 May 2017 21:21:42 +0200
>
> Am 13.05.2017 um 22:38 schrieb jdolecek%NetBSD.org@localhost:
> > Synopsis: vioscsi kernel panic on a KVM hypervisor
> >
> > State-Changed-From-To: open->feedback
> > State-Changed-By: jdolecek%NetBSD.org@localhost
> > State-Changed-When: Sat, 13 May 2017 20:38:08 +0000
> > State-Changed-Why:
> > A fix was committed in src/sys/dev/pci/vioscsi.c revision 1.17. Can you
> > please check with updated -current kernel?
> >
> >
> >
> Thanks for your work.
> The installation works now, allthough the "resource shortage" messages
> appear.
> The 'resource shortage' messages also seem to affect the write
> performance.
> However, I see some strange behavior and I'm not sure if it is related to
> the vioscsi driver:
>
> After installation, I put some load on the virtual disk, and the whole
> system seems to freeze.
> Once it continued after a couple of minutes, currently it is wedged for
> 10min+..
> FWIW, I could produce this on a 10gb test image, default installation,
> with the following, but only on 3 out of 8 attempts:
>
> dd if=/dev/urandom of=/home/test1.bin bs=1m count=128
> ls -lahR /
> for i in $(seq 0 8);do dd if=/home/test1.bin of=/home/foo$i ;done
> #when the system freezes, here are no "adapter resource shortage"
> messages, they only appear when the system works without freeze
> ls -lahR /
> for i in $(seq 0 8);do dd if=/home/test1.bin of=/home/foo$i ;done
> #this freezes, no keyboard input, not even '(qemu) sendkey ctrl-alt-f2'
>
>
--001a113f23fc66c3a5054f81b806
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr">Could you please transcribe the kernel messages which appe=
ar just before the resource shortages? It should something along '<span=
style=3D"font-family:monaco;font-size:11px;font-variant-ligatures:no-commo=
n-ligatures;color:rgb(213,59,211)">%s</span><span style=3D"color:rgb(195,55=
,32);font-family:monaco;font-size:11px;font-variant-ligatures:no-common-lig=
atures">: error </span><span style=3D"font-family:monaco;font-size:11px;fon=
t-variant-ligatures:no-common-ligatures;color:rgb(213,59,211)">%d</span><sp=
an style=3D"color:rgb(195,55,32);font-family:monaco;font-size:11px;font-var=
iant-ligatures:no-common-ligatures"> loading DMA map</span>' or '<s=
pan style=3D"color:rgb(195,55,32);font-family:monaco;font-size:11px;font-va=
riant-ligatures:no-common-ligatures">error reserving </span><span style=3D"=
font-family:monaco;font-size:11px;font-variant-ligatures:no-common-ligature=
s;color:rgb(213,59,211)">%d</span><span style=3D"color:rgb(195,55,32);font-=
family:monaco;font-size:11px;font-variant-ligatures:no-common-ligatures"> (=
nsegs </span><span style=3D"font-family:monaco;font-size:11px;font-variant-=
ligatures:no-common-ligatures;color:rgb(213,59,211)">%d</span><span style=
=3D"color:rgb(195,55,32);font-family:monaco;font-size:11px;font-variant-lig=
atures:no-common-ligatures">)</span>'.<br><div><br></div><div>Jaromir</=
div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">2017-05=
-14 21:25 GMT+02:00 MB <span dir=3D"ltr"><<a href=3D"mailto:code@boersch=
ig.net" target=3D"_blank">code%boerschig.net@localhost</a>></span>:<br><blockquote=
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc soli=
d;padding-left:1ex"><span class=3D"">The following reply was made to PR ker=
n/52199; it has been noted by GNATS.<br>
<br>
From: MB <<a href=3D"mailto:code%boerschig.net@localhost";>code%boerschig.net@localhost</a>&g=
t;<br>
To: gnats-bugs%NetBSD.org@localhost<br>
Cc:<br>
</span>Subject: Re: kern/52199 (vioscsi kernel panic on a KVM hypervisor)<b=
r>
Date: Sun, 14 May 2017 21:21:42 +0200<br>
<div><div class=3D"h5"><br>
=C2=A0Am 13.05.2017 um 22:38 schrieb jdolecek%NetBSD.org@localhost:<br>
=C2=A0> Synopsis: vioscsi kernel panic on a KVM hypervisor<br>
=C2=A0><br>
=C2=A0> State-Changed-From-To: open->feedback<br>
=C2=A0> State-Changed-By: jdolecek%NetBSD.org@localhost<br>
=C2=A0> State-Changed-When: Sat, 13 May 2017 20:38:08 +0000<br>
=C2=A0> State-Changed-Why:<br>
=C2=A0> A fix was committed in src/sys/dev/pci/vioscsi.c revision 1.17. =
Can you<br>
=C2=A0> please check with updated -current kernel?<br>
=C2=A0><br>
=C2=A0><br>
=C2=A0><br>
</div></div>=C2=A0Thanks for your work.<br>
=C2=A0The installation works now, allthough the "resource shortage&quo=
t; messages appear.<br>
=C2=A0The 'resource shortage' messages also seem to affect the writ=
e performance.<br>
=C2=A0However, I see some strange behavior and I'm not sure if it is re=
lated to the vioscsi driver:<br>
<br>
=C2=A0After installation, I put some load on the virtual disk, and the whol=
e system seems to freeze.<br>
=C2=A0Once it continued after a couple of minutes, currently it is wedged f=
or 10min+..<br>
=C2=A0FWIW, I could produce this on a 10gb test image, default installation=
, with the following, but only on 3 out of 8 attempts:<br>
<br>
=C2=A0dd if=3D/dev/urandom of=3D/home/test1.bin bs=3D1m count=3D128<br>
=C2=A0ls -lahR /<br>
=C2=A0for i in $(seq 0 8);do dd if=3D/home/test1.bin of=3D/home/foo$i ;done=
<br>
=C2=A0#when the system freezes, here are no "adapter resource shortage=
" messages, they only appear when the system works without freeze<br>
=C2=A0ls -lahR /<br>
=C2=A0for i in $(seq 0 8);do dd if=3D/home/test1.bin of=3D/home/foo$i ;done=
<br>
=C2=A0#this freezes, no keyboard input, not even '(qemu) sendkey ctrl-a=
lt-f2'<br>
<br>
</blockquote></div><br></div>
--001a113f23fc66c3a5054f81b806--
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