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Re: [PATCH v1 03/15] perf, tools, stat: Fix saved values rbtree lookup

From Jiri Olsa <jolsa@redhat.com>
Newsgroups linux.kernel
Subject Re: [PATCH v1 03/15] perf, tools, stat: Fix saved values rbtree lookup
Date 2017-08-02 09:40 +0200
Message-ID <u9Wq5-6U6-1@gated-at.bofh.it> (permalink)
References <u6VgR-3zh-3@gated-at.bofh.it> <u6VgT-3zh-43@gated-at.bofh.it>
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On Mon, Jul 24, 2017 at 04:40:03PM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@linux.intel.com>
> 
> The stat shadow saved values rbtree is indexed by a pointer.
> Fix the comparison function:
> 
> - We cannot return a pointer delta as an int because
> that loses bits on 64bit.
> - Doing pointer arithmetic on the struct pointer
> only works if the objects are spaced by the multiple
> of the object size, which is not guaranteed for individual
> malloc'ed object
> 
> Replace it with a proper comparison.
> 
> This fixes various problems with values not being found.
> 
> Signed-off-by: Andi Kleen <ak@linux.intel.com>

Acked-by: Jiri Olsa <jolsa@kernel.org>

thanks,
jirka

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Re: [PATCH v1 03/15] perf, tools, stat: Fix saved values rbtree  lookup Jiri Olsa <jolsa@redhat.com> - 2017-08-02 09:40 +0200
  Re: [PATCH v1 03/15] perf, tools, stat: Fix saved values rbtree  lookup Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-08-02 21:20 +0200

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