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/freebsd-10-stable/cddl/contrib/opensolaris/cmd/zinject/
H A Dtranslate.cdiff 247265 Mon Feb 25 10:44:22 MST 2013 mm MFV v242732:

Merge the ZFS I/O deadman thread from vendor (illumos).
This feature panics the system on hanging ZFS I/O, helps debugging
and resumes failed service.

The panic behavior can be controlled with the loader-only tunables:
vfs.zfs.deadman_enabled (enable or disable panic on stalled ZFS I/O)
vfs.zfs.deadman_synctime (expiration time for stalled ZFS I/O)

By default, ZFS I/O deadman is enabled by default on amd64 and i386
excluding virtual guest machines.

Illumos ZFS issues:
3246 ZFS I/O deadman thread

References:
https://www.illumos.org/issues/3246

MFC after: 2 weeks
/freebsd-10-stable/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/
H A Dspa_boot.hdiff 247265 Mon Feb 25 10:44:22 MST 2013 mm MFV v242732:

Merge the ZFS I/O deadman thread from vendor (illumos).
This feature panics the system on hanging ZFS I/O, helps debugging
and resumes failed service.

The panic behavior can be controlled with the loader-only tunables:
vfs.zfs.deadman_enabled (enable or disable panic on stalled ZFS I/O)
vfs.zfs.deadman_synctime (expiration time for stalled ZFS I/O)

By default, ZFS I/O deadman is enabled by default on amd64 and i386
excluding virtual guest machines.

Illumos ZFS issues:
3246 ZFS I/O deadman thread

References:
https://www.illumos.org/issues/3246

MFC after: 2 weeks

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