Re: your mail

From: Adrian Bunk (bunk_at_fs.tum.de)
Date: 09/30/03

  • Next message: bert hubert: "Re: datatransfer slow down with 1TB files" 
    Date:	Tue, 30 Sep 2003 18:34:41 +0200
To: Dave Jones <davej@redhat.com>, Jamie Lokier <jamie@shareable.org>, John Bradford <john@grabjohn.com>, akpm@osdl.org, torvalds@osdl.org, linux-kernel@vger.kernel.org

    On Tue, Sep 30, 2003 at 03:50:08PM +0100, Dave Jones wrote:
    >...
    > > Basically, if you're building a
    > > distro boot kernel, you must turn on all known workarounds. That's
    > > certainly lowest-common-denominator, but it's a far cry from the
    > > configuration that a 386-as-firewall user wants.
    >
    > Ok, I see what you're getting at, but Adrian's patch turned arch/i386/Kconfig
    > and arch/i386/Makefile into guacamole. After spending so much time
    > getting that crap into something maintainable, it seemed a huge step
    > backwards to litter it with dozens of ifdefs and duplication.
    > There has to be a cleaner way of pleasing everyone.
    >...

    Referring to the latest patch I sent:

    arch/i386/Kconfig:
    The only problems seem to be some CPU_ONLY_* derived symbols I haven't
    yet found a better solution for.

    arch/i386/Makefile:
    There are two ifdefs to deal with Pentium 4 and K7/K8 selected at the
    same time:
    ifdef CONFIG_CPU_PENTIUM4
      cpuflags-$(CONFIG_CPU_K{7,8}) := ...
    else
      cpuflags-$(CONFIG_CPU_K{7,8}) := ...
    endif

    That's perhaps not optimal but IMHO not that bad.

    The dozens of ifdefs were in other areas where I tried to add some
    additional space optimizations. It was a mistake to put them into the
    same patch and in the latest patches I sent they were already separated
    and they are _not_ required for the CPU selection scheme.

    > Dave

    cu
    Adrian 

    -- 
       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed
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