Messages in this thread | | | Date | Tue, 16 Mar 2010 10:55:23 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH 2/2] perf top: Properly notify the user that vmlinux is missing |
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* David Miller <davem@davemloft.net> wrote:
> From: Ingo Molnar <mingo@elte.hu> > Date: Tue, 16 Mar 2010 10:46:11 +0100 > > > i'd really like that to happen - i.e. if we had the kernel (and modules) image > > exposed as a (almost-)standard ELF object via /sys or so. > > > > We already have some aspects of that, via /sys/kernel/notes, but it should be > > done for real. That would also make build-id support less of a hack. > > > > ( I'd not include CFI debuginfo in there though - that would be way too large. > > More compressed debuginfo could be included perhaps. ) > > That's interesting and useful, but wouldn't help my case as the images I'm > usually booting are completely stripped.
/me too
> That's why I end up with "[kernel.kallsyms]" for kernel profiling :-)
The kernel image itself is still present in RAM, obviously. So are the symbols (packed for kallsyms).
So exposing a virtual ELF image via /sys (or /proc/kernel.so) wouldnt take up much more RAM and would be rather useful, right?
Ingo
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