Re: perf: Support uncore in 4.9.112

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On 8/9/2018 3:47 PM, Greg KH wrote:
On Thu, Aug 09, 2018 at 01:59:09PM +0800, Jin, Yao wrote:


On 8/8/2018 4:40 PM, Greg KH wrote:
On Wed, Aug 08, 2018 at 03:37:54PM +0800, Jin, Yao wrote:
   182 files changed, 97061 insertions(+), 159 deletions(-)

Look at that, 97 thousand lines added :(

Yes, almost everything here is in tools/perf/ which leads me to ask why
can't you just run a newer kernel's perf on 4.9 and have all of this
support?  Why do you need these in the stable 4.9 release in order for
this to work properly?

And as you can see here, that's really way too big for a stable kernel
release, how can you justify it based on the stable kernel rules?

thanks,

greg k-h


Yes, I agree, too much code here. :(

And we can use 4.12+ perf tool in 4.9 kernel for using uncore though user
may mix the source trees for this. But anyway, this is a solution.

What do you mean "mix the source trees"?


I mean, users may need 2 trees. For example, one is 4.14, and the other is 4.9.

They build the perf tool binary in 4.14 and copy it to 4.9 environment.

That's the mix I mean. Sorry, the word may not be very appropriate.

Thanks
Jin Yao





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