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svn:author
V 2
mm
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svn:date
V 27
2010-10-18T08:54:33.617222Z
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svn:log
V 786
MFC r213197, r213198:

MFC r213197:
Enable offlining of log devices.

OpenSolaris revision and Bug IDs:

9701:cc5b64682e64
6803605	should be able to offline log devices
6726045	vdev_deflate_ratio is not set when offlining a log device
6599442	zpool import has faults in the display

MFC r213198:
Properly handle IO with B_FAILFAST
Retry IO once with ZIO_FLAG_TRYHARD before declaring a pool faulted

OpenSolaris revision and Bug IDs:

9725:0bf7402e8022
6843014 ZFS B_FAILFAST handling is broken

As FreeBSD does not support B_FAILFAST and we don't use vdev_disk.c,
MFC of r213198 is a no-op with the purpose of diff reduction against
latest ZFS code and making future updates easier.

Approved by:	delphij (mentor)
Obtained from:	OpenSolaris (Bug ID 6803605, 6726045, 6599442, 6843014)

END