linux-kernel - Re: [PATCH 2/3] perf callchain: Stop resolving callchains after invalid address

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Message-ID: <565705D1.705@gmail.com>
Date:	Thu, 26 Nov 2015 06:14:57 -0700
From:	David Ahern <dsahern@...il.com>
To:	Namhyung Kim <namhyung@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Jiri Olsa <jolsa@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Kan Liang <kan.liang@...el.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Wang Nan <wangnan0@...wei.com>
Subject: Re: [PATCH 2/3] perf callchain: Stop resolving callchains after
 invalid address

On 11/26/15 12:08 AM, Namhyung Kim wrote:
> @@ -528,11 +529,16 @@ int main(int argc, const char **argv)
>   {
>   	const char *cmd;
>   	char sbuf[STRERR_BUFSIZE];
> +	int min_addr;
>
>   	/* The page_size is placed in util object. */
>   	page_size = sysconf(_SC_PAGE_SIZE);
>   	cacheline_size = sysconf(_SC_LEVEL1_DCACHE_LINESIZE);
>
> +	if (sysctl__read_int("vm/mmap_min_addr", &min_addr) < 0)

This assumes the record and analysis are done on the same system.

David

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