On Tue, 2006-06-27 at 15:01 -0700, hawkes@xxxxxxx wrote: > include/asm-ia64/param.h defines HZ to be 1024 for usermode use, i.e., > when the file gets installed as /usr/include/asm/param.h. > As the comment says: > Technically, this is wrong, but some old apps still refer to it. > The proper way to get the HZ value is via sysconf(_SC_CLK_TCK). > At the very least, this technically wrong #define ought to reflect the > current default value (250) used by all arch/ia64 platforms. No one uses > 1024 anymore. This makes those "old apps" (e.g., usr/bin/iostat) behave > properly for with a default kernel. (And at some point, the define ought > to be removed altogether, which would expose all the applications that > erroneously expect HZ to be a compile-time constant.) > > Signed-off-by: John Hawkes <hawkes@xxxxxxx> > > Index: linux/include/asm-ia64/param.h > =================================================================== > --- linux.orig/include/asm-ia64/param.h 2006-06-17 18:49:35.000000000 -0700 > +++ linux/include/asm-ia64/param.h 2006-06-27 14:46:53.119407077 -0700 > @@ -36,7 +36,7 @@ > * Technically, this is wrong, but some old apps still refer to it. The proper way to > * get the HZ value is via sysconf(_SC_CLK_TCK). > */ > -# define HZ 1024 > +# define HZ 250 > #endif ok why not define the userspace HZ to #define HZ sysconf(_SC_CLK_TCK) ? - : send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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