OpenSolaris

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Bug ID 6575979
Synopsis ZFS_DEBUG_DPRINTF burns too much CPU
State 10-Fix Delivered (Fix available in build)
Category:Subcategory kernel:zfs
Keywords
Responsible Engineer Matthew Ahrens
Reported Against
Duplicate Of
Introduced In solaris_nevada
Commit to Fix snv_69
Fixed In snv_69
Release Fixed solaris_nevada(snv_69) , solaris_10u6(s10u6_01) (Bug ID:2156405)
Related Bugs
Submit Date 2-July-2007
Last Update Date 29-April-2008
Description 
ZFS_DEBUG_DPRINTF is only needed when actively debugging; thus it 
can be off by default even on debug bits with no loss of 
functionality, but significantly better performance.

Once this bug is fixed, you will need to do
"echo zfs_flags/W 0xf | mdb -kw" before using the zfs-dprintf 
dtrace probe.
Work Around 
N/A
Comments 
N/A