Am 12.02.19 um 12:57 schrieb Thomas Gleixner:
On Tue, 29 Jan 2019, Thomas Gleixner wrote:
On Tue, 29 Jan 2019, Jan H. Schönherr wrote:
Am 29.01.2019 um 11:23 schrieb Jan H. Schönherr:
+calibrate:
+ /*
+ * Extrapolate the error and fail fast if the error will
+ * never be below 500 ppm.
+ */
+ if (d1 + d1 >= (delta * MAX_QUICK_PIT_ITERATIONS) >> 11) {
+ pr_info("Fast TSC calibration failed (wouldn't work)\n");
+ return 0;
+ }
I messed this check up. "delta" is not the actual tsc delta between the
first two successful reads at this point.
(If it were, it might also correspond to more than one iteration; not
sure if we care about that aspect, though.)
I rather go for correct and if only for the reason that me/you/whoelse
doesn't have to scratch the head for an hour when looking at this half a
year from now.
Any update on this?
Second version is out.
Regards
Jan
