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#188 [FAQ] Add item regarding [vdso] messages.

closed-fixed
None
5
2011-08-12
2010-01-20
Paul Menzel
No

Dear OProfile people,

could you please add an item to the FAQ explaining what

warning: [vdso] (tgid:1664 range:0xf732a000-0xf732b000) could not be found.

means. I found no answer to this yet on the Web, just unanswered questions [1].

Maynard and movement helped on IRC. I use their answers as a basis for a draft.

If you get this error message you can safely ignore it. It just indicates temporary memory allocations from the kernel that it loads some executable code into memory(?). The fact you are seeing those messages indicates some samples were taken when that code was running, but now, at post-processing time, `opreport` cannot find the vdso anymore. »vdso« is virtual dynamic shared object. vdso is basically system call overhead (Add a link to an explanation what this means perhaps?).

Thanks,

Paul

[1] http://forums.fedoraforum.org/showthread.php?t=231470

Discussion

    • assigned_to: nobody --> maynardj
    • status: open --> open-fixed
     
  • Added a FAQ item for this issue.

     
    • status: open-fixed --> closed-fixed