Re: [RFC][PATCH] nbd driver for 2.5+: fix locking issues with ioctl UI

viro@parcelfarce.linux.theplanet.co.uk
Wed, 25 Jun 2003 18:56:49 +0100


On Wed, Jun 25, 2003 at 01:48:16PM -0400, Paul Clements wrote:

> This patch introduces a locking hierarchy between the lo->tx_lock and
> lo->queue_lock. The existing driver does not have this limitation.
> I would feel a lot better about this patch if you were to recode it
> to avoid this.

?????

One of them is a semaphore, another - a spinlock. Of course there always
had been a hierarchy - you can't call down() under a spinlock, the damn
thing can schedule.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/