[3.12-rc] sg_open: leaving the kernel with locks still held!

Hello! While trying to figure out why the request queue to sda (ext4) was clogging up on one of our btrfs backup boxes, I noticed a megarc process in D state, so enabled locking debugging, and got this (on 3.12-rc6): [ 205.372823] [ 205.372901] [

Re: [3.12-rc] sg_open: leaving the kernel with locks still held!

On Wed, Oct 23, 2013 at 10:10:47AM -0400, Douglas Gilbert wrote: > On 13-10-23 03:44 AM, James Bottomley wrote: > >On Tue, 2013-10-22 at 20:41 -0400, Douglas Gilbert wrote: > >>On 13-10-22 04:56 PM, Simon Kirby wrote: > >>>Hello! > >>> > >>>W