Author: davide
Date: Mon Mar 4 16:16:23 2013
New Revision: 247799
URL: http://svnweb.freebsd.org/changeset/base/247799
Log:
MFcalloutng (r236314 by mav):
Specify that wakeup rate of 7.5-10Hz is enough for yarrow harvesting
thread.
Sponsored by: Google Summer of Code 2012, iXsystems inc.
Tested by: flo, marius, ian, markj, Fabian Keil
Modified:
head/sys/dev/random/randomdev_soft.c
Modified: head/sys/dev/random/randomdev_soft.c
==============================================================================
--- head/sys/dev/random/randomdev_soft.c Mon Mar 4 16:07:55 2013
(r247798)
+++ head/sys/dev/random/randomdev_soft.c Mon Mar 4 16:16:23 2013
(r247799)
@@ -242,10 +242,10 @@ random_kthread(void *arg __unused)
local_count = 0;
/* Process until told to stop */
+ mtx_lock_spin(&harvest_mtx);
for (; random_kthread_control >= 0;) {
/* Cycle through all the entropy sources */
- mtx_lock_spin(&harvest_mtx);
for (source = RANDOM_START; source < ENTROPYSOURCE; source++) {
/*
* Drain entropy source records into a thread-local
@@ -270,7 +270,6 @@ random_kthread(void *arg __unused)
emptyfifo.count += local_count;
local_count = 0;
}
- mtx_unlock_spin(&harvest_mtx);
KASSERT(local_count == 0, ("random_kthread: local_count %d",
local_count));
@@ -283,9 +282,11 @@ random_kthread(void *arg __unused)
random_kthread_control = 0;
/* Work done, so don't belabour the issue */
- pause("-", hz / 10);
+ msleep_spin_sbt(&random_kthread_control, &harvest_mtx,
+ "-", SBT_1S / 10, 0, C_PREL(1));
}
+ mtx_unlock_spin(&harvest_mtx);
random_set_wakeup_exit(&random_kthread_control);
/* NOTREACHED */
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