Hi List, I am attempting to extract a tar archive into a btrfs filesystem and more often than not tar will fail with “No space left on device” error. I say “more often than not” because sometimes the extraction completes successfully even though I am following the same steps.
# mkfs.btrfs -f -s 65536 -n 65536 -d single -m dup /dev/system/turner_lv # mount -v -o rw,relatime,space_cache /dev/system/turner_lv /turner # cd /turner # tar -xpf ~/turner.tar --selinux --xattrs --xattrs-include=* Here is the error message for the latest attempt. Note that filename in the “no space” message from tar is not consistent in that it could fail on a different file on a separate attempt. tar: ./lib/firmware/keyspan/usa18x.fw: Cannot open: No space left on device tar: ./lib/firmware/nvidia/gm200/gr/sw_ctx.bin: Cannot open: No space left on device tar: ./lib/modules/4.4.73-7-default/kernel/drivers/md/faulty.ko: Cannot open: No space left on device tar: ./lib/modules/4.4.73-7-default/kernel/net/dns_resolver/dns_resolver.ko: Cannot open: No space left on device tar: ./lib/modules/4.4.73-7-default/kernel/net/ipv4/ip_gre.ko;5cc1f748: Cannot open: No space left on device tar: Exiting with failure status due to previous errors The tar archive contains about 566M when extracted and the btrfs filesystem is 5G in size. A few other tidbits that I have noticed: - this behavior is only so far found on ppc64le. I have performed the same steps on x86-64 without issue. - when I slow down the write speed I have more successes (https://www.spinics.net/lists/linux-btrfs/msg83384.html) - the btrfs filesystem is created on a LVM logical volume, whose volume group is using a device-mapper multipath device as the physical volume. note that I have replicated this same issue by removing LVM and multipath. # uname -a Linux mpath6pwr8 4.4.73-7-default #1 SMP Fri Jul 21 13:26:40 UTC 2017 (6beeafd) ppc64le ppc64le ppc64le GNU/Linux # cat /etc/os-release NAME="SLES" VERSION="12-SP3" VERSION_ID="12.3" PRETTY_NAME="SUSE Linux Enterprise Server 12 SP3" ID="sles" ANSI_COLOR="0;32" CPE_NAME="cpe:/o:suse:sles_sap:12:sp3” # btrfs --version btrfs-progs v4.5.3+20160729 # mkfs.btrfs --version mkfs.btrfs, part of btrfs-progs v4.5.3+20160729 # tar --version tar (GNU tar) 1.27.1 # btrfs fi show Label: none uuid: 5895b3f8-6d36-4d37-aabd-0cbdbca62144 Total devices 1 FS bytes used 544.62MiB devid 1 size 5.00GiB used 1.32GiB path /dev/mapper/system-root Label: none uuid: 8e71ab0d-0ef7-4b21-af05-c792ad0ac28d Total devices 1 FS bytes used 9.76GiB devid 1 size 15.00GiB used 12.02GiB path /dev/mapper/system-usr_lv Label: none uuid: bf684abc-34db-4033-872f-c7cb46139263 Total devices 1 FS bytes used 1.56MiB devid 1 size 5.00GiB used 536.00MiB path /dev/mapper/system-home_lv Label: none uuid: cb0e6369-4579-4145-9c0e-a94f0fdffcc5 Total devices 1 FS bytes used 406.56MiB devid 1 size 2.00GiB used 852.75MiB path /dev/mapper/system-root_lv Label: none uuid: ba3219c3-f5f4-438c-86c6-80ac2fa2454d Total devices 1 FS bytes used 92.31MiB devid 1 size 5.00GiB used 1.02GiB path /dev/mapper/system-tmp_lv Label: none uuid: 43418ec3-4a96-4fe9-9646-f6d2e976f85d Total devices 1 FS bytes used 212.12MiB devid 1 size 5.00GiB used 1.02GiB path /dev/mapper/system-var_lv Label: none uuid: 8917ac61-6d5a-40c7-8605-7c48990baf8a Total devices 1 FS bytes used 19.19MiB devid 1 size 5.00GiB used 1.02GiB path /dev/mapper/system-opt_lv Label: none uuid: 4b47b636-785a-4498-af16-8496deee26ac Total devices 1 FS bytes used 543.75MiB devid 1 size 5.00GiB used 1.52GiB path /dev/mapper/system-turner_lv # btrfs fi df /turner Data, single: total=1.01GiB, used=538.69MiB System, DUP: total=8.00MiB, used=64.00KiB Metadata, DUP: total=256.00MiB, used=5.00MiB GlobalReserve, single: total=16.00MiB, used=0.00B # btrfs fi usage /turner Overall: Device size: 5.00GiB Device allocated: 1.52GiB Device unallocated: 3.48GiB Device missing: 0.00B Used: 548.81MiB Free (estimated): 3.96GiB (min: 2.22GiB) Data ratio: 1.00 Metadata ratio: 2.00 Global reserve: 16.00MiB (used: 0.00B) Data,single: Size:1.01GiB, Used:538.69MiB /dev/mapper/system-turner_lv 1.01GiB Metadata,DUP: Size:256.00MiB, Used:5.00MiB /dev/mapper/system-turner_lv 512.00MiB System,DUP: Size:8.00MiB, Used:64.00KiB /dev/mapper/system-turner_lv 16.00MiB Unallocated: /dev/mapper/system-turner_lv 3.48GiB
dmesg.out
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