Hi everyone, I'm still have the problem with the snapshot command. Here what I tested today : read writ|files inodes 0 408k| 2784 7264 0 460k| 2784 7264 0 496k| 2784 7264 0 424k| 2784 7264 0 440k| 2784 7264 0 1280k| 2784 7264 0 500k| 2784 7264 0 592k| 2784 7264 0 600k| 2784 7264 0 568k| 2784 7264 0 792k| 2784 7264 0 756k| 2784 7264 0 480k| 2784 7264 0 592k| 2784 7264 0 432k| 2784 7264 0 544k| 2784 7264 0 512k| 2784 7264 0 2912k| 2784 7264 0 3332k| 2784 7264 0 40M| 2784 7264 0 52M| 2784 7264 0 1280k| 2784 7264 0 69M| 2784 7264 -dsk/total- --filesystem- read writ|files inodes 0 5584k| 2784 7264 0 784k| 2784 7264 0 624k| 2784 7264 0 616k| 2784 7264 0 744k| 2784 7264 0 736k| 2784 7264 0 652k| 2784 7264 0 540k| 2784 7264 0 752k| 2784 7264 0 780k| 2784 7264 0 888k| 2784 7264 0 480k| 2784 7264 0 504k| 2784 7264 0 548k| 2784 7264 0 892k| 2784 7264 0 580k| 2784 7264 0 576k| 2784 7264 0 636k| 2784 7264 0 544k| 2784 7264 0 760k| 2784 7264 0 752k| 2784 7264 0 648k| 2784 7264 0 744k| 2784 7264 -dsk/total- --filesystem- read writ|files inodes 0 516k| 2784 7264 0 608k| 2784 7264 0 672k| 2784 7264 0 524k| 2784 7264 0 524k| 2784 7264 0 520k| 2784 7264 0 476k| 2784 7264 0 520k| 2784 7264 0 568k| 2784 7264 0 520k| 2784 7264 0 548k| 2784 7264 0 616k| 2784 7264 0 832k| 2784 7264 0 824k| 2784 7264 0 700k| 2784 7264 0 864k| 2784 7264 0 1208k| 2784 7264 0 1064k| 2784 7264 0 588k| 2784 7264 0 688k| 2784 7264 0 41M| 2784 7264 308k 17M| 2784 7269 7488k 456k| 2784 7268 -dsk/total- --filesystem- read writ|files inodes 8192B 496k| 2784 7268 ^C When the snapshot run, you see that the write change from K to M. And now I have a good example for my problem : gentootux ~ # mount /dev/sda4 -o noatime,ssd,discard,compress=lzo,noacl,space_cache,subvolid=0 /mnt/disklayout/ gentootux ~ # cd /mnt/disklayout/ gentootux disklayout # ls @backup @racine gentootux disklayout # time btrfs subvolume delete @backup Delete subvolume '/mnt/disklayout/@backup' real 0m0.005s user 0m0.001s sys 0m0.002s gentootux disklayout # ls @racine gentootux disklayout # time btrfs subvolume snapshot @racine @backup Create a snapshot of '@racine' in './@backup' real 0m2.850s user 0m0.000s sys 0m0.010s gentootux disklayout # ls @backup @racine gentootux disklayout # time btrfs subvolume delete @backup Delete subvolume '/mnt/disklayout/@backup' real 0m0.001s user 0m0.000s sys 0m0.000s gentootux disklayout # time btrfs subvolume snapshot @racine @backup Create a snapshot of '@racine' in './@backup' real 3m53.616s user 0m0.000s sys 0m0.299s Instead of 3 secondes to run the snapshot, it took almost 4 minutes. Is there any btrfs log that I could look at to detect the bottleneck ? For the record, when this happens inside my Xfce desktop, if I try to launch a terminal, nothing happen, it's like my PC freeze until the snapshot is done. Thanks ! -- Salut alp Sylvain -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
