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Description of problem:
Avoid zeroing every request structure in virtio-blk.

This is a patch proposed for upstream by Stefan from IBM.

Version-Release number of selected component (if applicable):


How reproducible:

Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:

Have run benchmarks seeing performance boost of 5-20% with this patch applied.

Patch not in upstream yet, but been acked by community. Believe it is very low risk to apply to RHEL6.

Created attachment 414901 [details]
Avoid zeroing every request structure in virtio-blk

This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
inclusion.

Created attachment 422824 [details]
54 vs 61 raw data

As comment #8 & #9 .I close it.