On Tue, 2005-05-17 at 10:45 +1200, Mike Honeyfield wrote: > On 5/17/05, Ignacio Vazquez-Abrams <ivazquez@xxxxxxxxxxxx> wrote: > > On Tue, 2005-05-17 at 10:29 +1200, Mike Honeyfield wrote: > > > I am just wondering the reasoning behind having the experimental > > > option "Use register arguments" on in the kernel config. > > > > > > It has caused some issues for me, have since fixed it, but was > > > wondering why an experimental feature that could/can break the ABI for > > > 3rd party binary only modules would be enabled? > > > > Speed. Pushing data onto the stack takes longer than just shoving it > > into a register. > > > > So the speed improvement is enough to justify this? Even a 2 clock cycle delay happening hundreds of thousands or even millions of times a second builds up. > I could understand Fedora Core's kernels have this feature, but was a > bit suprised to see the same issue in RHEL. Agreed. But then again it really shouldn't affect a large number of modules. -- Ignacio Vazquez-Abrams <ivazquez@xxxxxxxxxxxx> http://fedora.ivazquez.net/ gpg --keyserver hkp://subkeys.pgp.net --recv-key 38028b72
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