On Mon, May 12, 2014 at 06:29:28PM -0700, Austin Schuh wrote: > On Wed, Mar 5, 2014 at 4:53 PM, Austin Schuh <austin@xxxxxxxxxxxxxxxx> wrote: > > Hi Dave, > > > > On Wed, Mar 5, 2014 at 3:35 PM, Dave Chinner <david@xxxxxxxxxxxxx> wrote: > >> On Wed, Mar 05, 2014 at 03:08:16PM -0800, Austin Schuh wrote: > >>> Howdy, > >>> > >>> I'm running a config_preempt_rt patched version of the 3.10.11 kernel, > >>> and I'm seeing a couple lockups and crashes which I think are related > >>> to XFS. > >> > >> I think they ar emore likely related to RT issues.... > >> > > > > That very well may be true. > > > >> Your usb device has disconnected and gone down the device > >> removal/invalidate partition route. and it's trying to flush the > >> device, which is stuck on IO completion which is stuck waiting for > >> the device error handling to error them out. > >> > >> So, this is a block device problem error handling problem caused by > >> device unplug getting stuck because it's decided to ask the > >> filesystem to complete operations that can't be completed until the > >> device error handling progress far enough to error out the IOs that > >> the filesystem is waiting for completion on. > >> > >> Cheers, > >> > >> Dave. > >> -- > >> Dave Chinner > >> david@xxxxxxxxxxxxx > > I had the issue reproduce itself today with just the main SSD > installed. This was on a new machine that was built this morning. > There is a lot less going on in this trace than the previous one. The three blocked threads: 1. kworker running IO completion waiting on an inode lock, holding locked pages. 2. kworker running writeback flusher work waiting for a page lock 3. direct flush work waiting for allocation, holding page locks and the inode lock. What's the kworker thread running the allocation work doing? You might need to run `echo w > proc-sysrq-trigger` to get this information... Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
