[PATCH 0/5]Add kvm trace support v3

[PATCH 0/5]Add kvm trace support v3

[Liu, Eric E]

Hi, Avi and all
	According to your comments from V2, I work out the new patchsets
of kvm trace. Please help to review, Thanks.
In this version, fix the issues you pointed out and add a new ioctl
PAUSE to make user space  app better to control trace stream.
Hope it is useful for performance accounting and cause less headaches
when people use it :).

A simple guide about how to use it:
	- In order to user kvm trace, The CONFIG_KVM_TRACE kernel option
should be selected to enable kvm trace support during kernel config.
	- When kvm trace is setting, user space tool kvmtrace can be
used to collect trace data from relayfs. 
	  BTW: The host debug filesystem should be mounted.  For
example, mount -t debugfs debugfs /sys/kernel/debug.
	- A simple example is like this:
		In kvm-usersapce. 
			Insmod ./kernel/kvm.ko
			Insmod ./kernel/kvm-intel.ko (or kvm-amd.ko)
		When we want to trace data, Run, as root :
			./user/kvmtrace -o tmp
		Press Ctl-c to stop it, if we only have one LP, we may
get a binary file named tmp.kvmtrace.0
		Run ./user/kvmtrace_format ./user/formats
>tracedata<tmp.kvmtrace.0 to format the binary file, we will get the
textual data.
	Welcome to use and improve it :)

--Eric (Liu, Feng)

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Re: [PATCH 0/5]Add kvm trace support v3

[Avi Kivity]

Liu, Eric E wrote:
> Hi, Avi and all
> 	According to your comments from V2, I work out the new patchsets
> of kvm trace. Please help to review, Thanks.
> In this version, fix the issues you pointed out and add a new ioctl
> PAUSE to make user space  app better to control trace stream.
> Hope it is useful for performance accounting and cause less headaches
> when people use it :).
>
>   

Applied all, thanks.  I added a comment to the effect that the binary 
interface is not fixed, so we can change it at will.  I also stubbed out 
ia64 and s390 support.

-- 
Any sufficiently difficult bug is indistinguishable from a feature.


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