3.16.6-203.fc20.x86_64+debug Doing a scrub on a raid1 volume, directly formatted 2 plain unpartitioned HDDs. Every now and then I get a message: [ 613.056923] kworker/dying (6) used greatest stack depth: 10600 bytes left This doesn't happen when I'm not doing scrubs. It doesn't happen with kernel 3.14.22. There doesn't seem to be an immediate consequence of this but it's unexpected. Chris Murphy-- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html