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On Monday 06 December 2004 12:02, Holly Bostick wrote: |
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> Holly Bostick wrote: |
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> > Peter Ruskin wrote: |
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> >> On Monday 06 December 2004 05:09, Ow Mun Heng wrote: |
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> > >>PS : Your signature noted that you're runnning |
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> > >> 2.6.9-r6-regparm. |
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> >>> |
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> >>> What's Regparm |
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> >> |
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> >> I just added "-regparm" to "EXTRAVERSION" in the kernel source |
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> >> Makefile to remind me that I had set CONFIG_REGPARM=y |
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> >> (Processor type and features): |
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> >> |
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> >> "Use register arguments (EXPERIMENTAL) (REGPARM) |
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> >> |
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> >> Compile the kernel with -mregparm=3. This uses an different |
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> >> ABI and passes the first three arguments of a function call in |
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> >> registers. This will probably break binary only modules. |
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> > |
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> > Like the ATI drivers, if you use them (which I do), thus |
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> > presumably also the nVidia drivers, if you use them. So I don't |
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> > use this setting myself, tasty as it looks. |
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|
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I use the nVidia drivers with no problems. The whole desktop seems |
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a bit more snappy with regparm. |
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> > |
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> > Just a note, before Ow Mung goes recompiling his kernel to |
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> > enable this ;-) . |
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> > |
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> > Holly |
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> |
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> Not so much to reply to myself, but on second thought, maybe it |
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> was splashutils/fbsplash that is broken by this. |
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> |
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> Anyway, the point being that there are some modules that seem |
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> unrelated, but which one might be using, that will break if |
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> regparm is set. So be careful. |
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> |
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Good advice. It's been around for a while but I didn't use it |
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before because it broke Win4Lin. Now that Netraverse has issued |
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new patches for this problem, I'm experiencing regparm for the |
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first time. |
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|
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As with any experimental kernel feature, I make a new kernel with a |
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description in EXTRAVERSION and keep previous kernels in case |
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things go wrong. Now that I'm happy with regparm I've included it |
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in my upgraded kernel and omitted the reminder from EXTRAVERSION. |
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|
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-- |
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Peter |
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======================================================================== |
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Gentoo Linux: Portage 2.0.51-r3. kernel-2.6.9-gentoo-r9. |
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i686 AMD Athlon(tm) XP 3200+. gcc(GCC): 3.3.4. |
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KDE: 3.3.1. Qt: 3.3.3. |
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======================================================================== |
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|
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-- |
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