rspro board and mounting root from SD

[Florian Kruegl]

Hi Adrian,

got it running from sd card for a few month now without probs. Flash
seemed to small for putting freebsd on.

seems to be a reace condition until usb mas registers scsi device.

one second is nuff...

brain:head> svn diff
Index: sys/kern/vfs_mount.c
===================================================================
--- sys/kern/vfs_mount.c	(revision 203445)
+++ sys/kern/vfs_mount.c	(working copy)
@@ -72,6 +72,9 @@
 #define	ROOTNAME		"root_device"
 #define	VFS_MOUNTARG_SIZE_MAX	(1024 * 64)
 
+static int	mount_root_delay = 4;
+TUNABLE_INT("mount_root_delay", &mount_root_delay);
+
 static void	set_rootvnode(void);
 static int	vfs_domount(struct thread *td, const char *fstype,
 		    char *fspath, int fsflags, void *fsdata);
@@ -1409,13 +1412,18 @@
 		PICKUP_GIANT();
 		mtx_lock(&mountlist_mtx);
 		if (LIST_EMPTY(&root_holds)) {
-			mtx_unlock(&mountlist_mtx);
-			break;
+		    if(0 == mount_root_delay--) {
+			    mtx_unlock(&mountlist_mtx);
+			    break;
+			}
 		}
 		if (ppsratecheck(&lastfail, &curfail, 1)) {
 			printf("Root mount waiting for:");
 			LIST_FOREACH(h, &root_holds, list)
 				printf(" %s", h->who);
+			if(LIST_EMPTY(&root_holds)) {
+			    printf(" %d secs...", mount_root_delay);
+			}
 			printf("\n");
 		}
 		msleep(&root_holds, &mountlist_mtx, PZERO | PDROP, "roothold",

On Fri, 2010-02-05 at 13:28 +0800, Adrian Chadd wrote:
> On 5 February 2010 13:24, M. Warner Losh <imp at bsdimp.com> wrote:
> 
> > : If I stick a root_mount_hold() call in umass_attach(), the umass
> > : device is given the opportunity to complete probe/attach but obviously
> > : then a lack of root_mount_rel() results in nothing completing.
> >
> > Where did you put this?
> 
> After the call to umass_cam_attach() in umass_attach()
> 
> 
> 
> 
> Adrian
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