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When loading GEOM modules, we expect the actual load process to be done

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by the time that kldload(8) returns.  Satisfy that by making the GEOM
module load event -- only when the kernel is !cold -- wait until the
GEOM module init function has finished instead of returning immediately.

This is the other half of fixing md(8) (actually, "mfs" in fstab(5))
that is similar to r1.128 of src/sys/dev/md/md.c.  This bug would be
why RAM disks would often fail on boot and the first call to mdconfig(8)
would probably fail.

pjd has ideas for not requiring kldload(8) to work synchronously for
control devices that could make this obsolete.

Silence on:	-arch
This commit is contained in:
Brian Feldman 2004-10-12 04:44:54 +00:00
parent 00b5244e28
commit 6f299fa373
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=136414
1 changed files with 9 additions and 1 deletions
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10
sys/geom/geom_subr.c
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@ -195,7 +195,15 @@ g_modevent(module_t mod, int type, void *data)
switch (type) {
case MOD_LOAD:
g_trace(G_T_TOPOLOGY, "g_modevent(%s, LOAD)", hh->mp->name);
g_post_event(g_load_class, hh, M_WAITOK, NULL);
/*
* Once the system is not cold, MOD_LOAD calls will be
* from the userland and the g_event thread will be able
* to acknowledge their completion.
*/
if (cold)
g_post_event(g_load_class, hh, M_WAITOK, NULL);
else
g_waitfor_event(g_load_class, hh, M_WAITOK, NULL);
error = 0;
break;
case MOD_UNLOAD: