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Index: head/sys/cam/cam_iosched.c
===================================================================
--- head/sys/cam/cam_iosched.c
+++ head/sys/cam/cam_iosched.c
@@ -533,7 +533,7 @@
sbintime_t now, delta;
int pending;
- callout_reset(&isc->ticker, hz / isc->quanta - 1, cam_iosched_ticker, isc);
+ callout_reset(&isc->ticker, hz / isc->quanta, cam_iosched_ticker, isc);
now = sbinuptime();
delta = now - isc->last_time;
@@ -798,7 +798,7 @@
return error;
}
/* Note: disk load averate requires ticker to be always running */
- callout_reset(&isc->ticker, hz / isc->quanta - 1, cam_iosched_ticker, isc);
+ callout_reset(&isc->ticker, hz / isc->quanta, cam_iosched_ticker, isc);
isc->flags |= CAM_IOSCHED_FLAG_CALLOUT_ACTIVE;
cam_periph_unlock(isc->periph);
@@ -1055,7 +1055,7 @@
callout_init_mtx(&(*iscp)->ticker, cam_periph_mtx(periph), 0);
(*iscp)->periph = periph;
cam_iosched_cl_init(&(*iscp)->cl, *iscp);
- callout_reset(&(*iscp)->ticker, hz / (*iscp)->quanta - 1, cam_iosched_ticker, *iscp);
+ callout_reset(&(*iscp)->ticker, hz / (*iscp)->quanta, cam_iosched_ticker, *iscp);
(*iscp)->flags |= CAM_IOSCHED_FLAG_CALLOUT_ACTIVE;
}
#endif

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