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

[Namhyung Kim <namhyung@kernel.org>]

Hi David,

On Thu, Nov 26, 2015 at 06:14:57AM -0700, David Ahern wrote:
> 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.

Right.  Maybe we can just use minimal size (or page size?) or save and
pass it through somewhere in the feature bit?

Thanks,
Namhyung