linux-kernel - Re: [PATCH] perf tools: set kernel end address properly

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Message-ID: <20180416165800.GD3202@kernel.org>
Date:   Mon, 16 Apr 2018 13:58:00 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Kim Phillips <kim.phillips@....com>
Cc:     Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Jiri Olsa <jolsa@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, kernel-team@....com
Subject: Re: [PATCH] perf tools: set kernel end address properly

Em Mon, Apr 16, 2018 at 11:07:30AM -0500, Kim Phillips escreveu:
> On Mon, 16 Apr 2018 10:51:25 -0300
> Arnaldo Carvalho de Melo <acme@...nel.org> wrote:
> 
> > Em Mon, Apr 16, 2018 at 11:23:45AM +0200, Jiri Olsa escreveu:
> > > On Mon, Apr 16, 2018 at 01:22:40PM +0900, Namhyung Kim wrote:
> > > > The map_groups__fixup_end() was called to set end addresses of kernel
> > > > map and module maps.  But now machine__create_modules() is set the end
> > > > address of modules properly so the only remaining piece is the kernel
> > > > map.  We can set it with adjacent module's address directly instead of
> > > > calling the map_groups__fixup_end().  If there's no module after the
> > > > kernel map, the end address will be ~0ULL.
> > 
> > I wonder if it wouldn't be better to have it as last symbol + PAGE_SIZE
> > or something like that...
> > 
> > But, anyway, Kim, does this fix things for you? Can I have your
> > Tested-by?
> 
> No, perf test 1 still fails:
> 
> vmlinux symtab matches kallsyms: FAILED!

Ok, -vv please

- Arnaldo