On Mon, Nov 28 2016, Marc Smith wrote:
>
> # find /sys/block/md127/md
> /sys/block/md127/md
> /sys/block/md127/md/reshape_position
> /sys/block/md127/md/layout
> /sys/block/md127/md/raid_disks
> /sys/block/md127/md/bitmap
> /sys/block/md127/md/bitmap/chunksize
This tells me that:
sysfs_remove_group(&mddev->kobj, &md_bitmap_group);
hasn't been run, so mddev_delayed_delete() hasn't run.
That suggests the final mddev_put() hsn't run. i.e. mddev->active is > 0
Everything else suggests that array has been stopped and cleaned and
should be gone...
This seems to suggest that there is an unbalanced mddev_get() without a
matching mddev_put(). I cannot find it though.
If I could reproduce it, I would try to see what is happening by:
- putting
printk("mddev->active = %d\n", atomic_read(&mddev->active));
in the top of mddev_put(). That shouldn't be *too* noisy.
- putting
printk("rd=%d empty=%d ctime=%d hold=%d\n", mddev->raid_disks,
list_empty(&mddev->disks), mddev->ctime, mddev->hold_active);
in mddev_put() just before those values are tested.
- putting
printk("queue_work\n");
just before the 'queue_work()' call in mddev_put.
- putting
printk("mddev_delayed_delete\n");
in mddev_delayed_delete()
Then see what gets printed when you stop the array.
NeilBrown
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