linux-kernel - Re: [PATCH v2 0/2] perf probe fixes for ppc64le

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Date:	Thu, 14 Apr 2016 11:16:57 +1000
From:	Balbir Singh <bsingharora@...il.com>
To:	"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Cc:	Mark Wielaard <mjw@...hat.com>,
	Thiago Jung Bauermann <bauerman@...ux.vnet.ibm.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>
Subject: Re: [PATCH v2 0/2] perf probe fixes for ppc64le



On 12/04/16 19:10, Naveen N. Rao wrote:
> This patchset fixes three issues found with perf probe on ppc64le:
> 1. 'perf test kallsyms' failure on ppc64le (reported by Michael
> Ellerman). This was due to the symbols being fixed up during symbol
> table load. This is fixed in patch 2 by delaying symbol fixup until
> later.
> 2. perf probe function offset was being calculated from the local entry
> point (LEP), which does not match user expectation when trying to look
> at function disassembly output (reported by Ananth N). This is fixed for
> kallsyms in patch 1 and for symbol table in patch 2.
> 3. perf probe failure with kretprobe when using kallsyms. This was
> failing as we were specifying an offset. This is fixed in patch 1.
> 
> A few examples demonstrating the issues and the fix:
> 

Given the choices, I think this makes sense

Acked-by: Balbir Singh <bsingharora@...il.com>