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Fix RS warning at start-up by inheriting scdeduling properties from init for unprivileged children of system processes

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Erik van der Kouwe 2010-07-16 14:56:05 +00:00
parent 7f47f4174d
commit 98725c443e
1 changed files with 14 additions and 1 deletions
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15
servers/pm/schedule.c
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@ -54,6 +54,7 @@ PUBLIC void sched_init(void)
PUBLIC int sched_start_user(endpoint_t ep, struct mproc *rmp) PUBLIC int sched_start_user(endpoint_t ep, struct mproc *rmp)
{ {
unsigned maxprio; unsigned maxprio;
endpoint_t inherit_from;
int rv; int rv;
/* convert nice to priority */ /* convert nice to priority */
@ -61,10 +62,22 @@ PUBLIC int sched_start_user(endpoint_t ep, struct mproc *rmp)
return rv; return rv;
} }
/* scheduler must know the parent, which is not the case for a child
* of a system process created by a regular fork; in this case the
* scheduler should inherit settings from init rather than the real
* parent
*/
if (mproc[rmp->mp_parent].mp_flags & PRIV_PROC) {
assert(mproc[rmp->mp_parent].mp_scheduler == NONE);
inherit_from = INIT_PROC_NR;
} else {
inherit_from = mproc[rmp->mp_parent].mp_endpoint;
}
/* inherit quantum */ /* inherit quantum */
return sched_inherit(ep, /* scheduler_e */ return sched_inherit(ep, /* scheduler_e */
rmp->mp_endpoint, /* schedulee_e */ rmp->mp_endpoint, /* schedulee_e */
mproc[rmp->mp_parent].mp_endpoint, /* parent_e */ inherit_from, /* parent_e */
maxprio, /* maxprio */ maxprio, /* maxprio */
&rmp->mp_scheduler); /* *newsched_e */ &rmp->mp_scheduler); /* *newsched_e */
} }