On 2012-09-28 16:38, Dave Jones wrote: > On Fri, Sep 28, 2012 at 10:41:50AM +0200, Jens Axboe wrote: > > > > Turns out that blkid is running simultaneously with losetup -d, and > > > so it sees an elevated reference count and returns EBUSY. But why > > > is blkid running? It's obvious, isn't it? udev has decided to try > > > and find out what is on the block device as a result of a creation > > > notification. And it is racing with mkfs, so might still be scanning > > > the device when mkfs finishes and we try to tear it down. > > > > > I hear that %^#@#! blkid behavior, it is such a pain in the neck. I > > don't know how many times I've had to explain that behaviour to people > > who run write testing with tracing, wonder wtf there are reads in the > > trace. > > Could this problem explain this bug too ? https://bugzilla.redhat.com/show_bug.cgi?id=853674 It certainly looks like it! -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
