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SubjectRe: [tip:perf/urgent] perf symbols: Handle /proc/sys/kernel/kptr_restrict

* Arnaldo Carvalho de Melo <acme@redhat.com> wrote:

> > Had you done this you'd have immediately noticed that the individual
> > lines are *way* too large to fit on even large terminals. Please
> > break such messages in a much shorter fashion - we want the error
> > messages we output to be readable even on relatively small (80col)
> > terminals.
>
> But it would reflow, no?

Not on all terminals. For example my terminal will just cut anything
beyond the col limit:

# perf report --stdio
No kallsyms or vmlinux with build-id 122214021a666675f6e5ff97d70a85ce7139c0e7 was found
[kernel.kallsyms] with build id 122214021a666675f6e5ff97d70a85ce7139c0e7 not found, continuing without s
Kernel address maps (/proc/{kallsyms,modules}) were restricted, check /proc/sys/kernel/kptr_restrict bef
So we generally want to generate error messages to look good on col80
- it should not be hard here, right?

Thanks,

Ingo


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