Oon-Ee Ng
2014-Aug-24 09:55 UTC
6+ MiB/s constant usage on a btrfs volume with kernel 3.16
Hi, I'm using 64-bit Arch Linux. Since update to kernel versions 3.16 and 3.16.1 I'm getting a constant 6+ MiB/s write on my root. Root does not seem to fill up though. Has run for 2 hours straight, and obviously slows everything else down to a crawl. Downgrading to 3.15.8 (last working version for me) solves the symptoms. I'm unsure how to check for root causes, and my distro's mailing list suggested starting here. btrfs info as shown below, and this dropbox link[1] is a png printscreen of my iotop and perf top. Please advise. Btrfs v3.14.2 % btrfs fi show Label: 'DATA' uuid: 762a0d46-d88b-4d2a-a4ff-ba9de5ebe993 Total devices 1 FS bytes used 380.17GiB devid 1 size 439.83GiB used 439.83GiB path /dev/sda9 Label: 'HOME' uuid: 00f91282-ab65-429d-b0f6-2439924755a7 Total devices 1 FS bytes used 73.03GiB devid 1 size 97.66GiB used 97.66GiB path /dev/sda7 Label: 'ROOT' uuid: 4c860350-eced-4224-a4ec-657576fc54e8 Total devices 1 FS bytes used 25.49GiB devid 1 size 34.18GiB used 34.18GiB path /dev/sda6 Btrfs v3.14.2 % btrfs fi df / Data, single: total=31.90GiB, used=24.66GiB System, DUP: total=8.00MiB, used=12.00KiB System, single: total=4.00MiB, used=0.00 Metadata, DUP: total=1.12GiB, used=853.64MiB Metadata, single: total=8.00MiB, used=0.00 unknown, single: total=288.00MiB, used=0.00 [1] - https://db.tt/TSh5piq6 -- 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