Hi, After applying the patch, I got WARN_ON. btrfs progs finished without any error message, but received subvolume is not the same as send subvolume. Here's the related information. thanks, robbieko uanme -a Linux ubuntu 4.0.0-rc4-custom #2 SMP Tue Apr 14 11:43:00 CST 2015 x86_64 x86_64 x86_64 GNU/Linux btrfs --version Btrfs v3.14.1 Steps to reproduce: $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ mkfs.btrfs -f /dev/sdc $ mount /dev/sdc /mnt2 $ mkdir -p /mnt/data $ mkdir -p /mnt/data/n1/n2 $ mkdir -p /mnt/data/n4 $ mkdir -p /mnt/data/n1/n2/p1 $ mkdir -p /mnt/data/t4 $ mkdir -p /mnt/data/p1 $ mkdir -p /mnt/data/p1/2 $ btrfs subvolume snapshot -r /mnt /mnt/snap1 $ mv /mnt/data/n1/n2 /mnt/data/t4 $ mv /mnt/data/n4 /mnt/data/t4/n2 $ mv /mnt/data/t4/n2/p1 /mnt/data/t4/p1 $ mv /mnt/data/p1 /mnt/data/t4/n2 $ btrfs subvolume snapshot -r /mnt /mnt/snap2 $ btrfs send /mnt/snap1 | btrfs receive /mnt2 $ btrfs send -p /mnt/snap1 /mnt/snap2 | btrfs receive /mnt2 Call trace message [ 135.498533] ------------[ cut here ]------------ [ 135.498557] WARNING: CPU: 1 PID: 2346 at fs/btrfs/send.c:5934 btrfs_ioctl_send+0xc4c/0x11e0 [btrfs]() [ 135.498560] Modules linked in: nf_conntrack_ipv4(E) nf_defrag_ipv4(E) xt_conntrack(E) nf_conntrack(E) ipt_REJECT(E) nf_reject_ipv4(E) xt_tcpudp(E) iptable_filter(E) ip_tables(E) x_tables(E) bridge(E) stp(E) llc(E) snd_intel8x0(E) snd_ac97_codec(E) ac97_bus(E) snd_pcm(E) snd_timer(E) snd(E) iosf_mbi(E) soundcore(E) ppdev(E) joydev(E) lp(E) serio_raw(E) parport_pc(E) i2c_piix4(E) mac_hid(E) parport(E) btrfs(E) xor(E) raid6_pq(E) hid_generic(E) usbhid(E) hid(E) ahci(E) psmouse(E) libahci(E) e1000(E) pata_acpi(E) [ 135.498578] CPU: 1 PID: 2346 Comm: btrfs Tainted: G E 4.0.0-rc4-custom #3 [ 135.498580] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 [ 135.498583] ffffffffc0509016 ffff88007a233c08 ffffffff817b62f3 0000000000000007 [ 135.498586] 0000000000000000 ffff88007a233c48 ffffffff8107452a ffffc90000567000 [ 135.498590] ffff8800799f1400 ffff8800799f1418 ffff88007b3f82d0 ffff880079f60000 [ 135.498593] Call Trace: [ 135.498602] [<ffffffff817b62f3>] dump_stack+0x45/0x57 [ 135.498609] [<ffffffff8107452a>] warn_slowpath_common+0x8a/0xc0 [ 135.498614] [<ffffffff8107461a>] warn_slowpath_null+0x1a/0x20 [ 135.498626] [<ffffffffc04f5c6c>] btrfs_ioctl_send+0xc4c/0x11e0 [btrfs] [ 135.498632] [<ffffffff8118020e>] ? __alloc_pages_nodemask+0x1ae/0xab0 [ 135.498638] [<ffffffff810a4775>] ? sched_clock_local+0x25/0x90 [ 135.498643] [<ffffffff8109182e>] ? alloc_pid+0x2e/0x530 [ 135.498655] [<ffffffffc04bc4f6>] btrfs_ioctl+0x286/0x27e0 [btrfs] [ 135.498660] [<ffffffff810a6368>] ? __enqueue_entity+0x78/0x80 [ 135.498665] [<ffffffff810add70>] ? enqueue_entity+0x400/0xc20 [ 135.498679] [<ffffffff8101dc3a>] ? native_sched_clock+0x2a/0x90 [ 135.498686] [<ffffffff810ae708>] ? enqueue_task_fair+0x178/0x730 [ 135.498698] [<ffffffff81047c1d>] ? native_smp_send_reschedule+0x4d/0x70 [ 135.498703] [<ffffffff8109d5f0>] ? resched_curr+0x70/0xc0 [ 135.498710] [<ffffffff8109e12a>] ? check_preempt_curr+0x5a/0xa0 [ 135.498715] [<ffffffff810a152f>] ? wake_up_new_task+0x12f/0x1b0 [ 135.498722] [<ffffffff81204010>] do_vfs_ioctl+0x2e0/0x4e0 [ 135.498728] [<ffffffff8107368c>] ? do_fork+0x13c/0x370 [ 135.498733] [<ffffffff81204291>] SyS_ioctl+0x81/0xa0 [ 135.498738] [<ffffffff81073946>] ? SyS_clone+0x16/0x20 [ 135.498839] [<ffffffff817bd80d>] ? stub_clone+0x6d/0x90 [ 135.498845] [<ffffffff817bd50d>] system_call_fastpath+0x16/0x1b [ 135.498848] ---[ end trace e1dd916182de3a9d ]--- [ 135.498851] ------------[ cut here ]------------ [ 135.498871] WARNING: CPU: 1 PID: 2346 at fs/btrfs/send.c:5951 btrfs_ioctl_send+0x28f/0x11e0 [btrfs]() [ 135.498894] Modules linked in: nf_conntrack_ipv4(E) nf_defrag_ipv4(E) xt_conntrack(E) nf_conntrack(E) ipt_REJECT(E) nf_reject_ipv4(E) xt_tcpudp(E) iptable_filter(E) ip_tables(E) x_tables(E) bridge(E) stp(E) llc(E) snd_intel8x0(E) snd_ac97_codec(E) ac97_bus(E) snd_pcm(E) snd_timer(E) snd(E) iosf_mbi(E) soundcore(E) ppdev(E) joydev(E) lp(E) serio_raw(E) parport_pc(E) i2c_piix4(E) mac_hid(E) parport(E) btrfs(E) xor(E) raid6_pq(E) hid_generic(E) usbhid(E) hid(E) ahci(E) psmouse(E) libahci(E) e1000(E) pata_acpi(E) [ 135.498900] CPU: 1 PID: 2346 Comm: btrfs Tainted: G W E 4.0.0-rc4-custom #3 [ 135.498903] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006 [ 135.498910] ffffffffc0509016 ffff88007a233c08 ffffffff817b62f3 000000004c724c72 [ 135.498918] 0000000000000000 ffff88007a233c48 ffffffff8107452a ffff88007a233c38 [ 135.498923] ffff8800799f1400 ffff880078d52cc0 ffff880078d52cd8 ffff8800799f15d8 [ 135.498927] Call Trace: [ 135.498937] [<ffffffff817b62f3>] dump_stack+0x45/0x57 [ 135.498945] [<ffffffff8107452a>] warn_slowpath_common+0x8a/0xc0 [ 135.498951] [<ffffffff8107461a>] warn_slowpath_null+0x1a/0x20 [ 135.498975] [<ffffffffc04f52af>] btrfs_ioctl_send+0x28f/0x11e0 [btrfs] [ 135.498984] [<ffffffff8118020e>] ? __alloc_pages_nodemask+0x1ae/0xab0 [ 135.498990] [<ffffffff810a4775>] ? sched_clock_local+0x25/0x90 [ 135.498996] [<ffffffff8109182e>] ? alloc_pid+0x2e/0x530 [ 135.499023] [<ffffffffc04bc4f6>] btrfs_ioctl+0x286/0x27e0 [btrfs] [ 135.499031] [<ffffffff810a6368>] ? __enqueue_entity+0x78/0x80 [ 135.499037] [<ffffffff810add70>] ? enqueue_entity+0x400/0xc20 [ 135.499046] [<ffffffff8101dc3a>] ? native_sched_clock+0x2a/0x90 [ 135.499055] [<ffffffff810ae708>] ? enqueue_task_fair+0x178/0x730 [ 135.499061] [<ffffffff81047c1d>] ? native_smp_send_reschedule+0x4d/0x70 [ 135.499069] [<ffffffff8109d5f0>] ? resched_curr+0x70/0xc0 [ 135.499078] [<ffffffff8109e12a>] ? check_preempt_curr+0x5a/0xa0 [ 135.499087] [<ffffffff810a152f>] ? wake_up_new_task+0x12f/0x1b0 [ 135.499096] [<ffffffff81204010>] do_vfs_ioctl+0x2e0/0x4e0 [ 135.499106] [<ffffffff8107368c>] ? do_fork+0x13c/0x370 [ 135.499115] [<ffffffff81204291>] SyS_ioctl+0x81/0xa0 [ 135.499121] [<ffffffff81073946>] ? SyS_clone+0x16/0x20 [ 135.499131] [<ffffffff817bd80d>] ? stub_clone+0x6d/0x90 [ 135.499140] [<ffffffff817bd50d>] system_call_fastpath+0x16/0x1b [ 135.499144] ---[ end trace e1dd916182de3a9e ]--- -- 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
