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Fix scheduler support check

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Commit 94cc577807ba tried fixing build on systems that did not have
SCHED_BATCH or SCHED_IDLE defined.  But instead of changing it to
conditional support, it rather completely disabled the support for
setting any scheduler.  Since then, such old systems are not
supported, but rather than reverting that commit, let's change that to
the conditional support.  That way any addition to the list of
schedulers can follow the same style so that we're consistent in the
future.

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
This commit is contained in:
Martin Kletzander 2016-11-18 08:12:12 +01:00
parent 135e77d32f
commit f2bf5fbb04
1 changed files with 16 additions and 1 deletions
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17
src/util/virprocess.c
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@ -1183,7 +1183,7 @@ virProcessExitWithStatus(int status)
exit(value);
}
#if HAVE_SCHED_SETSCHEDULER && defined(SCHED_BATCH) && defined(SCHED_IDLE)
#if HAVE_SCHED_SETSCHEDULER
static int
virProcessSchedTranslatePolicy(virProcessSchedPolicy policy)
@ -1193,10 +1193,18 @@ virProcessSchedTranslatePolicy(virProcessSchedPolicy policy)
return SCHED_OTHER;
case VIR_PROC_POLICY_BATCH:
# ifdef SCHED_BATCH
return SCHED_BATCH;
# else
return -1;
# endif
case VIR_PROC_POLICY_IDLE:
# ifdef SCHED_IDLE
return SCHED_IDLE;
# else
return -1;
# endif
case VIR_PROC_POLICY_FIFO:
return SCHED_FIFO;
@ -1225,6 +1233,13 @@ virProcessSetScheduler(pid_t pid,
if (!policy)
return 0;
if (pol < 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("Scheduler '%s' is not supported on this platform"),
virProcessSchedPolicyTypeToString(policy));
return -1;
}
if (pol == SCHED_FIFO || pol == SCHED_RR) {
int min = 0;
int max = 0;