Hey. It looks like I'm being bitten by: http://article.gmane.org/gmane.comp.file-systems.btrfs/44987/ except I'm hitting it during rename, rather than unlink. Dmesg spew here: http://pastebin.ca/3137198 (That pastebin post includes the -unrelated- source of the W taint.) I'm running on Gentoo hardened-sources 4.1.6 on x86 (rather than amd64). The affected volume is mounted with "rw,relatime,ssd,discard,space_cache,autodefrag" and -AFAIK- has no subvolumes. emerge is the blocked program and is the Gentoo package manager. This lockup happens occasionally during the "Updating Portage cache" step of the emerge sync operation. The emerge task is unkillable and is blocked in D status. Attempts to re-run the cache update task have it hang at what appears to be the same place. Only a reboot can "fix" the problem. The rest of the system works just fine; the only thing that appears to be blocked is the Portage cache update. I couldn't find an open bug for this, but my Google-fu may be weak today. Did I miss the bug report, or is this a currently unknown or unconfirmed issue? Let me know if I can help with diagnostics.
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