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Date: Sun, 16 Nov 2014 10:22:16 +0200
From: Andriy Gapon <avg@FreeBSD.org>
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To: "K. Macy" <kmacy@FreeBSD.org>, Bogdan SOLGA <bogdan.solga@gmail.com>
Subject: Re: ZFS pool creation from files leads to a crash
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On 16/11/2014 09:29, K. Macy wrote:
> #23 0xffffffff819b9a2c in zfs_vn_rdwr (rw=UIO_WRITE,
> vp=0xfffff8005d94a3b0, base=0x0, len=104857600, offset=0,
>     seg=UIO_SYSSPACE, ioflag=128, ulimit=0, cr=0xfffff80002cd9000,
> residp=0xfffffe01219f6f18) at vnode.h:237
> #24 0xffffffff819b9706 in vdev_file_io_start (zio=0xfffff80009ebb000)
>     at /usr/home/kmacy/devel/freebsd-head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_file.c:188
> #25 0xffffffff819fcea3 in zio_vdev_io_start (zio=0xfffff80009ebb000)
>     at /usr/home/kmacy/devel/freebsd-head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:2709
> #26 0xffffffff819f51f1 in zio_execute (zio=0xfffff80009ebb000)
>     at /usr/home/kmacy/devel/freebsd-head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:1409
> #27 0xffffffff819f368a in zio_wait (zio=0xfffff80009ebb000)
>     at /usr/home/kmacy/devel/freebsd-head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:1433
> #28 0xffffffff819bb51e in vdev_label_init (vd=0xfffff80009919800,
> crtxg=4, reason=VDEV_LABEL_CREATE)
>     at /usr/home/kmacy/devel/freebsd-head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_label.c:718

Seems like this crash is caused by vdev_file_io_start being blissfully unaware
of ZIO_TYPE_FREE.

-- 
Andriy Gapon