Re: [PATCH v2] perf tools: allow map files to specify DSO

[Andi Kleen]

On Mon, May 07, 2018 at 02:24:16PM -0400, Josh Hunt wrote:
> Add the ability to specify a DSO in the /tmp/perf-<PID>.map file.
> The DSO should be the first line in the file and readable by the
> running user. If a valid DSO is found all other contents of the
> file will be ignored. This allows things like callchain unwinding
> with DWARF to work.

FWIW it's ok, but also obsolete with Kirill's large-pages-in-tmpfs
work in newer kernels. With that you can just copy the executable into
a 2MB tmpfs and disable the manual huge page copying and everything
should work as usually.

So essentially it's only a hack for old kernels and old binaries.

But doesn't hurt I guess.

-Andi