On Wed, Sep 12, 2018 at 06:15:41PM +0300, Nikolay Borisov wrote: > > > On 12.09.2018 17:45, Josef Bacik wrote: > > While testing my backport I noticed there was a panic if I ran > > generic/416 generic/417 generic/418 all in a row. This just happened to > > uncover a race where we had outstanding IO after we destroy all of our > > workqueues, and then we'd go to queue the endio work on those free'd > > workqueues. This is because we aren't waiting for the caching threads > > to be done before freeing everything up, so to fix this make sure we > > wait on any outstanding caching that's being done before we free up the > > block group, so we're sure to be done with all IO by the time we get to > > btrfs_stop_all_workers(). This fixes the panic I was seeing > > consistently in testing. > > It's not clear whether this is caused by one of the patches in your > latest patchbomb or has the issue been there all along?
Been here always, I noticed this on the backport of linus/master before I even got to pulling my shit ontop of that. Thanks, Josef
