Re: MADV_SPACEAVAIL and MADV_FREE in pre2-3

From: Andreas Jaeger (aj@suse.de)
Date: Sun Mar 19 2000 - 11:11:52 EST

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    >>>>> David S Miller writes:

    David> From: Andreas Jaeger <aj@suse.de>
    David> Date: 17 Mar 2000 12:05:04 +0100

    David> pre2-3 defines MADV_SPACEAVAIL in asm-alpha/mman.h and MADV_FREE in
    David> asm-sparc/mman.h.

    David> These defines are not used anywhere else in the kernel - and therefore
    David> the madvise function will return EINVAL for these defines.

    David> Is this really desired?

    David> They are values provided by OSF and Solaris respectively.

    David> If this makes for a big issue wrt. glibc we could move them to
    David> the OSF/Solaris emulation code on Alpha and Sparc but I think
    David> this would be really silly and would like to not have to do this.

    There's no need to change asm-*/mman.h since that header is not used
    by glibc.

    So far I haven't added them to glibc - and will not. AFAIU those
    flags are defined - but not used at all. That's the reason why I'm
    not adding them (yet) to glibc. But I'd like to point this out so
    that people can consider implementing MADV_SPACEAVAIL and MADV_FREE
    - and only if it's implemented it should be added to glibc.

    Andreas 

    -- 
 Andreas Jaeger
  SuSE Labs aj@suse.de
   private aj@arthur.rhein-neckar.de

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