On Wed, 26 Jan 2000, Jamie Lokier wrote:
> David Weinehall wrote:
> > Oh, talking about alignment, how about anyone familiar with the inner
> > workings of gcc (2.7.2.3 in this case) tell me why I get this warning for
> > all newer v2.3.xx kernels:
> >
> > sched.c:77: warning: alignment of `aligned_data' is greater than maximum
> > object file alignment
>
> That's not i386 is it?
486.
> ELF, used by many targets, supports large alignments. But formats like
> COFF and a.out do not, and GCC knows this.
Oki.
> Linux uses larger alignments for some things that should be aligned to a
> cache line, either to reduce SMP inter-processor traffic or simply
> because it's faster to read fewer cache lines for some critical things.
I doubt this is a good idea on 386's/486's, but I might be wrong...
/David
_ _
// David Weinehall <tao@acc.umu.se> /> Northern lights wander \\
// Project MCA Linux hacker // Dance across the winter sky //
\> http://www.acc.umu.se/~tao/ </ Full colour fire </
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