On Thursday July 6, pernegger@xxxxxxxxx wrote:
> Still more problems ... :(
>
> My md raid5 still does not always shut down cleanly. The last few
> lines of the shutdown sequence are always as follows:
>
> [...]
> Will now halt.
> md: stopping all md devices.
> md: md0 still in use.
> Synchronizing SCSI cache for disk /dev/sdd:
> Synchronizing SCSI cache for disk /dev/sdc:
> Synchronizing SCSI cache for disk /dev/sdb:
> Synchronizing SCSI cache for disk /dev/sda:
> Shutdown: hde
> System halted.
>
> Most of the time the md array comes up clean on the next boot, often
> enough it does not. Having the array rebuild after every other reboot
> is not my idea of fun, because the only reason to take it down is to
> exchange a failing disk.
>
How are you shutting down the machine? If something sending SIGKILL
to all processes? If it does, then md really should shut down cleanly
every time....
That said, I do see some room for improvement in the md shutdown
sequence - it shouldn't give up at that point just because the device
seems to be in use.... I'll look into that.
You could try the following patch. I think it should be safe.
NeilBrown
Signed-off-by: Neil Brown <neilb@xxxxxxx>
### Diffstat output
./drivers/md/md.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff .prev/drivers/md/md.c ./drivers/md/md.c
--- .prev/drivers/md/md.c 2006-07-07 08:11:43.000000000 +1000
+++ ./drivers/md/md.c 2006-07-07 08:12:15.000000000 +1000
@@ -3217,7 +3217,7 @@ static int do_md_stop(mddev_t * mddev, i
struct gendisk *disk = mddev->gendisk;
if (mddev->pers) {
- if (atomic_read(&mddev->active)>2) {
+ if (mode != 1 && atomic_read(&mddev->active)>2) {
printk("md: %s still in use.\n",mdname(mddev));
return -EBUSY;
}
-
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