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On Wed, Nov 30, 2005 at 05:18:47PM +0200, Matti Aarnio wrote: > On Tue, Nov 29, 2005 at 11:21:18PM -0500, Benjamin LaHaise wrote: > > Date: Tue, 29 Nov 2005 23:21:18 -0500 > > From: Benjamin LaHaise <bcrl@kvack.org> > > To: Andi Kleen <ak@suse.de> > > Cc: linux-kernel@vger.kernel.org > > Subject: [PATCH 0/9] x86-64 put current in r10 > > > > Hello Andi, > > > > The following emails contain the patches to convert x86-64 to store current > > in r10 (also at http://www.kvack.org/~bcrl/patches/v2.6.15-rc3/). This > > provides a significant amount of code savings (~43KB) over the current > > use of the per cpu data area. I also tested using r15, but that generated > > code that was larger than that generated with r10. This code seems to be > > working well for me now (it stands up to 32 and 64 bit processes and ptrace > > users) and would be a good candidate for further exposure. > > I would rather prefer NOT to introduce this at this time. > My primary concern is that during "even numbered series" there > should not be radical internal ABI/API changes, like this one. Hmm? I am not aware of such a constraint. It's not very invasive anyways in that it would require changing a lot of code. > In 2.7 it can be introduced, by all means. > > Indeed at the moment my thinking is, that X86-64 is way more UNSTABLE, > than it should be. (And Linux kernel overall, but that is another story.) The actual x86-64 kernel is actually quite stable, most of the reported problems (including yours) come from various hardware or firmware issues mostly in new platforms. If you use a trusty old chipset (e.g. AMD 8111 or Intel E7505) and proven motherboard you're usually ok. -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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