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Date:      Tue, 14 Jan 2025 09:10:01 +0100
From:      Maurizio Vairani <maurizio1018@gmail.com>
To:        Alexander Motin <mav@freebsd.org>
Cc:        freebsd-current <freebsd-current@freebsd.org>
Subject:   Re: Panic testing ZFS raidz expansion feature.
Message-ID:  <CAN0zgYWUae6EjRUmS%2BnjVF%2BWaXhRLoaEBT%2BwmwTO9u=eHhuLow@mail.gmail.com>
In-Reply-To: <79d3921a-a8cf-4daf-936e-6fc6f9634118@FreeBSD.org>
References:  <CAN0zgYUWBBO-nZ9hMSziU5pUQgBiVEBGhC=sZXoAFmPhFBA1fg@mail.gmail.com> <79d3921a-a8cf-4daf-936e-6fc6f9634118@FreeBSD.org>

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Hi Alexander,
thank you very much, with your patch it works.
--
Maurizio

Il giorno ven 10 gen 2025 alle ore 16:08 Alexander Motin <mav@freebsd.org>
ha scritto:

> Hi Maurizio,
>
> I was able to reproduce it on a real hardware.  The critical points are
> that vdev should have ashift > 9 and it should be a debug build.  This
> patch fixes it for me: https://github.com/openzfs/zfs/pull/16942 .
>
> On 10.01.2025 03:33, Maurizio Vairani wrote:
> > I'm using vm-bhyve-1.5.0_1. The vm-byve package is configured correctly.
> >
> > # vm iso
> >
> https://download.freebsd.org/snapshots/amd64/amd64/ISO-IMAGES/15.0/FreeBSD-15.0-CURRENT-amd64-20250109-4c89d59e0cda-274641-bootonly.iso
> <
> https://download.freebsd.org/snapshots/amd64/amd64/ISO-IMAGES/15.0/FreeBSD-15.0-CURRENT-amd64-20250109-4c89d59e0cda-274641-bootonly.iso
> >
> > # vm create fbsd15-13
> > # cd /mnt/pool2tb/vm/fbsd15-13
> > In fbsd15-13.conf:
> > memory=2G
> > # vm install fbsd15-13
> > FreeBSD-15.0-CURRENT-amd64-20250109-4c89d59e0cda-274641-bootonly.iso
> > # vm console fbsd15-13
> > Install the OS and switch off the VM.
> > # truncate -s 10G disk1.img
> > # truncate -s 10G disk2.img
> > # truncate -s 10G disk3.img
> > # truncate -s 10G disk4.img
> > lines added in fbsd15-13.conf:
> > disk1_type="virtio-blk"
> > disk1_name="disk1.img"
> > disk2_type="virtio-blk"
> > disk2_name="disk2.img"
> > disk3_type="virtio-blk"
> > disk3_name="disk3.img"
> > disk4_type="virtio-blk"
> > disk4_name="disk4.img"
> > # vm start fbsd15-13
> > # vm console fbsd15-13
> > In the VM:
> > # zpool create tank raidz1 vtbd1 vtbd2 vtbd3
> > # zpool attach tank raidz1-0 vtbd4
> > panic: VERIFY(vd == vd->vdev_top) failed
> >
> > cpuid = 0
> > time = 1736497428
> > KDB: stack backtrace:
> > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame
> > 0xfffffe005469f820
> > vpanic() at vpanic+0x136/frame 0xfffffe005469f950
> > spl_panic() at spl_panic+0x3a/frame 0xfffffe005469f9b0
> > zio_vdev_io_start() at zio_vdev_io_start+0x63a/frame 0xfffffe005469fa00
> > zio_nowait() at zio_nowait+0x10c/frame 0xfffffe005469fa40
> > vdev_check_boot_reserve() at vdev_check_boot_reserve+0x7a/frame
> > 0xfffffe005469fa70
> > spa_vdev_attach() at spa_vdev_attach+0x712/frame 0xfffffe005469faf0
> > zfs_ioc_vdev_attach() at zfs_ioc_vdev_attach+0x75/frame
> 0xfffffe005469fb30
> > zfsdev_ioctl_common() at zfsdev_ioctl_common+0x49a/frame
> 0xfffffe005469fbd0
> > zfsdev_ioctl() at zfsdev_ioctl+0xfb/frame 0xfffffe005469fc00
> > devfs_ioctl() at devfs_ioctl+0xd1/frame 0xfffffe005469fc50
> > vn_ioctl() at vn_ioctl+0xb6/frame 0xfffffe005469fcc0
> > devfs_ioctl_f() at devfs_ioctl_f+0x1e/frame 0xfffffe005469fce0
> > kern_ioctl() at kern_ioctl+0x286/frame 0xfffffe005469fd40
> > sys_ioctl() at sys_ioctl+0x12f/frame 0xfffffe005469fe00
> > amd64_syscall() at amd64_syscall+0x158/frame 0xfffffe005469ff30
> > fast_syscall_common() at fast_syscall_common+0xf8/frame
> 0xfffffe005469ff30
> > --- syscall (54, FreeBSD ELF64, ioctl), rip = 0x2f2054f58cca, rsp =
> > 0x2f2048e41cf8, rbp = 0x2f2048e41d60 ---
> > KDB: enter: panic
> > [ thread pid 999 tid 100184 ]
> > Stopped at      kdb_enter+0x33: movq    $0,0x10538d2(%rip)
> > db>
>
> --
> Alexander Motin
>

--0000000000002cde5b062ba617e5
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<div dir=3D"ltr"><div dir=3D"ltr"><div>Hi Alexander,</div><div>thank you ve=
ry much, with your patch it works.</div><div>--</div><div>Maurizio<br></div=
></div><br><div class=3D"gmail_quote gmail_quote_container"><div dir=3D"ltr=
" class=3D"gmail_attr">Il giorno ven 10 gen 2025 alle ore 16:08 Alexander M=
otin &lt;<a href=3D"mailto:mav@freebsd.org">mav@freebsd.org</a>&gt; ha scri=
tto:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px=
 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi Maurizio=
,<br>
<br>
I was able to reproduce it on a real hardware.=C2=A0 The critical points ar=
e <br>
that vdev should have ashift &gt; 9 and it should be a debug build.=C2=A0 T=
his <br>
patch fixes it for me: <a href=3D"https://github.com/openzfs/zfs/pull/16942=
" rel=3D"noreferrer" target=3D"_blank">https://github.com/openzfs/zfs/pull/=
16942</a> .<br>
<br>
On 10.01.2025 03:33, Maurizio Vairani wrote:<br>
&gt; I&#39;m using vm-bhyve-1.5.0_1. The vm-byve package is configured corr=
ectly.<br>
&gt; <br>
&gt; # vm iso <br>
&gt; <a href=3D"https://download.freebsd.org/snapshots/amd64/amd64/ISO-IMAG=
ES/15.0/FreeBSD-15.0-CURRENT-amd64-20250109-4c89d59e0cda-274641-bootonly.is=
o" rel=3D"noreferrer" target=3D"_blank">https://download.freebsd.org/snapsh=
ots/amd64/amd64/ISO-IMAGES/15.0/FreeBSD-15.0-CURRENT-amd64-20250109-4c89d59=
e0cda-274641-bootonly.iso</a> &lt;<a href=3D"https://download.freebsd.org/s=
napshots/amd64/amd64/ISO-IMAGES/15.0/FreeBSD-15.0-CURRENT-amd64-20250109-4c=
89d59e0cda-274641-bootonly.iso" rel=3D"noreferrer" target=3D"_blank">https:=
//download.freebsd.org/snapshots/amd64/amd64/ISO-IMAGES/15.0/FreeBSD-15.0-C=
URRENT-amd64-20250109-4c89d59e0cda-274641-bootonly.iso</a>&gt;<br>
&gt; # vm create fbsd15-13<br>
&gt; # cd /mnt/pool2tb/vm/fbsd15-13<br>
&gt; In fbsd15-13.conf:<br>
&gt; memory=3D2G<br>
&gt; # vm install fbsd15-13 <br>
&gt; FreeBSD-15.0-CURRENT-amd64-20250109-4c89d59e0cda-274641-bootonly.iso<b=
r>
&gt; # vm console fbsd15-13<br>
&gt; Install the OS and switch off the VM.<br>
&gt; # truncate -s 10G disk1.img<br>
&gt; # truncate -s 10G disk2.img<br>
&gt; # truncate -s 10G disk3.img<br>
&gt; # truncate -s 10G disk4.img<br>
&gt; lines added in fbsd15-13.conf:<br>
&gt; disk1_type=3D&quot;virtio-blk&quot;<br>
&gt; disk1_name=3D&quot;disk1.img&quot;<br>
&gt; disk2_type=3D&quot;virtio-blk&quot;<br>
&gt; disk2_name=3D&quot;disk2.img&quot;<br>
&gt; disk3_type=3D&quot;virtio-blk&quot;<br>
&gt; disk3_name=3D&quot;disk3.img&quot;<br>
&gt; disk4_type=3D&quot;virtio-blk&quot;<br>
&gt; disk4_name=3D&quot;disk4.img&quot;<br>
&gt; # vm start fbsd15-13<br>
&gt; # vm console fbsd15-13<br>
&gt; In the VM:<br>
&gt; # zpool create tank raidz1 vtbd1 vtbd2 vtbd3<br>
&gt; # zpool attach tank raidz1-0 vtbd4<br>
&gt; panic: VERIFY(vd =3D=3D vd-&gt;vdev_top) failed<br>
&gt; <br>
&gt; cpuid =3D 0<br>
&gt; time =3D 1736497428<br>
&gt; KDB: stack backtrace:<br>
&gt; db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame <br>
&gt; 0xfffffe005469f820<br>
&gt; vpanic() at vpanic+0x136/frame 0xfffffe005469f950<br>
&gt; spl_panic() at spl_panic+0x3a/frame 0xfffffe005469f9b0<br>
&gt; zio_vdev_io_start() at zio_vdev_io_start+0x63a/frame 0xfffffe005469fa0=
0<br>
&gt; zio_nowait() at zio_nowait+0x10c/frame 0xfffffe005469fa40<br>
&gt; vdev_check_boot_reserve() at vdev_check_boot_reserve+0x7a/frame <br>
&gt; 0xfffffe005469fa70<br>
&gt; spa_vdev_attach() at spa_vdev_attach+0x712/frame 0xfffffe005469faf0<br=
>
&gt; zfs_ioc_vdev_attach() at zfs_ioc_vdev_attach+0x75/frame 0xfffffe005469=
fb30<br>
&gt; zfsdev_ioctl_common() at zfsdev_ioctl_common+0x49a/frame 0xfffffe00546=
9fbd0<br>
&gt; zfsdev_ioctl() at zfsdev_ioctl+0xfb/frame 0xfffffe005469fc00<br>
&gt; devfs_ioctl() at devfs_ioctl+0xd1/frame 0xfffffe005469fc50<br>
&gt; vn_ioctl() at vn_ioctl+0xb6/frame 0xfffffe005469fcc0<br>
&gt; devfs_ioctl_f() at devfs_ioctl_f+0x1e/frame 0xfffffe005469fce0<br>
&gt; kern_ioctl() at kern_ioctl+0x286/frame 0xfffffe005469fd40<br>
&gt; sys_ioctl() at sys_ioctl+0x12f/frame 0xfffffe005469fe00<br>
&gt; amd64_syscall() at amd64_syscall+0x158/frame 0xfffffe005469ff30<br>
&gt; fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe005469=
ff30<br>
&gt; --- syscall (54, FreeBSD ELF64, ioctl), rip =3D 0x2f2054f58cca, rsp =
=3D <br>
&gt; 0x2f2048e41cf8, rbp =3D 0x2f2048e41d60 ---<br>
&gt; KDB: enter: panic<br>
&gt; [ thread pid 999 tid 100184 ]<br>
&gt; Stopped at =C2=A0 =C2=A0 =C2=A0kdb_enter+0x33: movq =C2=A0 =C2=A0$0,0x=
10538d2(%rip)<br>
&gt; db&gt;<br>
<br>
-- <br>
Alexander Motin<br>
</blockquote></div></div>

--0000000000002cde5b062ba617e5--



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