linux-kernel - Re: [PATCH 2/4] perf, kmem: Utilize the new generic cpunode

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Date:	Sat, 29 Mar 2014 18:10:47 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Don Zickus <dzickus@...hat.com>
Cc:	acme@...stprotocols.net, LKML <linux-kernel@...r.kernel.org>,
	jmario@...hat.com, fowles@...each.com,
	Li Zefan <lizf@...fujitsu.com>
Subject: Re: [PATCH 2/4] perf, kmem: Utilize the new generic cpunode_map

On Mon, Mar 24, 2014 at 03:32:55PM -0400, Don Zickus wrote:
> Use the previous patch implementation of cpunode_map for builtin-kmem.c
> Should not be any functional difference.
> 
> Cc: Li Zefan <lizf@...fujitsu.com>
> Signed-off-by: Don Zickus <dzickus@...hat.com>
> ---
>  tools/perf/builtin-kmem.c | 78 ++---------------------------------------------
>  1 file changed, 3 insertions(+), 75 deletions(-)
> 
> diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
> index 929462a..a61783a 100644
> --- a/tools/perf/builtin-kmem.c
> +++ b/tools/perf/builtin-kmem.c
> @@ -14,6 +14,7 @@
>  #include "util/parse-options.h"
>  #include "util/trace-event.h"
>  #include "util/data.h"
> +#include "util/cpumap.h"
>  
>  #include "util/debug.h"
>  
> @@ -31,9 +32,6 @@ static int			caller_lines = -1;
>  
>  static bool			raw_ip;
>  
> -static int			*cpunode_map;
> -static int			max_cpu_num;
> -
>  struct alloc_stat {
>  	u64	call_site;
>  	u64	ptr;
> @@ -55,76 +53,6 @@ static struct rb_root root_caller_sorted;
>  static unsigned long total_requested, total_allocated;
>  static unsigned long nr_allocs, nr_cross_allocs;
>  
> -#define PATH_SYS_NODE	"/sys/devices/system/node"
> -
> -static int init_cpunode_map(void)
> -{
> -	FILE *fp;
> -	int i, err = -1;
> -
> -	fp = fopen("/sys/devices/system/cpu/kernel_max", "r");

so the factored code from previous patches now reads
the max_cpu_num value from:
  /sys/devices/system/cpu/possible

is this intentional?

I think we want to have separate patches for code changes
and for changing the file with some comment.

jirka
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