Messages in this thread | | | From | Keith Owens <> | Subject | Re: [PATCH] Sort kallsyms in name order: kernel shrinks by 30k | Date | Tue, 11 May 2004 15:23:28 +1000 |
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On Tue, 11 May 2004 15:08:55 +1000, Rusty Russell <rusty@rustcorp.com.au> wrote: >Admittedly, anyone who sets CONFIG_KALLSYMS doesn't care about space, >it's a fairly trivial change. > >Name: Sort Kallsyms for Stem Compression >Status: Booted on 2.6.6 >Depends: Misc/kallsyms-include-aliases.patch.gz > >Leaving the symbols sorted by name rather than address, so stem >compression works more effectively. Saves a little over 30k here.
Not sure this is a good idea. proc_pid_wchan() calls kallsyms_lookup() and has been identified as a bottleneck on systems with a large number of processes. top can consume a complete cpu out of 128 cpus, all because of this bottleneck. I was toying with the idea of doing a binary chop on the address lookup, but this patch prevents that fix.
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