Hi, I ran a quite heavy script who create 10,000 subvolumes and then delete thoses 10,000 subvolumes.
No problems in the "create" part, but at the "delete" part I got several traceback from the kernel: [ 977.095799] Btrfs loaded [ 985.847955] device fsid 8375b14f-116e-4507-b523-607c2e04f485 devid 1 transid 55592 /dev/mapper/Data_snap [ 985.848307] btrfs: enabling inode map caching [ 985.848309] btrfs: disk space caching is enabled [ 1076.785592] btrfs: block rsv returned -28 [ 1076.785594] ------------[ cut here ]------------ [ 1076.785613] WARNING: at fs/btrfs/extent-tree.c:6164 btrfs_alloc_free_block+0x100/0x2c7 [btrfs]() [ 1076.785615] Hardware name: VMware Virtual Platform [ 1076.785617] Modules linked in: btrfs zlib_deflate libcrc32c fuse sunrpc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput ppdev e1000 parport_pc parport vmw_balloon microcode raid0 pcspkr i2c_piix4 i2c_core shpchp floppy mptspi mptscsih mptbase scsi_transport_spi [last unloaded: btrfs] [ 1076.785638] Pid: 13418, comm: btrfs-transacti Not tainted 3.3.0-rc4 #1 [ 1076.785639] Call Trace: [ 1076.785652] [<ffffffff8103db71>] warn_slowpath_common+0x85/0x9d [ 1076.785655] [<ffffffff8103dba3>] warn_slowpath_null+0x1a/0x1c [ 1076.785663] [<ffffffffa024c569>] btrfs_alloc_free_block+0x100/0x2c7 [btrfs] [ 1076.785674] [<ffffffffa028aa6e>] ? tree_insert+0x18a/0x1a3 [btrfs] [ 1076.785681] [<ffffffffa023d904>] __btrfs_cow_block+0x125/0x3ce [btrfs] [ 1076.785688] [<ffffffffa023e094>] btrfs_cow_block+0x108/0x153 [btrfs] [ 1076.785694] [<ffffffffa023aa7d>] ? unlock_up+0xbd/0xee [btrfs] [ 1076.785701] [<ffffffffa023fdd8>] btrfs_search_slot+0x24e/0x6a9 [btrfs] [ 1076.785710] [<ffffffffa0292ba7>] btrfs_delete_delayed_items+0x92/0x2bc [btrfs] [ 1076.785719] [<ffffffffa0293ace>] btrfs_run_delayed_items+0x92/0xfd [btrfs] [ 1076.785726] [<ffffffff8106335d>] ? __wake_up+0x44/0x4d [ 1076.785736] [<ffffffffa0257938>] btrfs_commit_transaction+0x24e/0x73e [btrfs] [ 1076.785745] [<ffffffffa0257f08>] ? join_transaction+0x2b/0x25c [btrfs] [ 1076.785751] [<ffffffff810594aa>] ? wake_up_bit+0x2a/0x2a [ 1076.785760] [<ffffffffa025261b>] transaction_kthread+0x177/0x221 [btrfs] [ 1076.785768] [<ffffffffa02524a4>] ? try_to_freeze+0x2f/0x2f [btrfs] [ 1076.785775] [<ffffffffa02524a4>] ? try_to_freeze+0x2f/0x2f [btrfs] [ 1076.785778] [<ffffffff8105901c>] kthread+0x89/0x91 [ 1076.785782] [<ffffffff814ad3e4>] kernel_thread_helper+0x4/0x10 [ 1076.785785] [<ffffffff81058f93>] ? kthread_freezable_should_stop+0x5d/0x5d [ 1076.785787] [<ffffffff814ad3e0>] ? gs_change+0x13/0x13 [ 1076.785789] ---[ end trace 1cb873a5ec9cba8d ]--- [ 1076.785814] btrfs: block rsv returned -28 [ 1076.785816] ------------[ cut here ]------------ [ 1076.785823] WARNING: at fs/btrfs/extent-tree.c:6164 btrfs_alloc_free_block+0x100/0x2c7 [btrfs]() [ 1076.785825] Hardware name: VMware Virtual Platform [ 1076.785826] Modules linked in: btrfs zlib_deflate libcrc32c fuse sunrpc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput ppdev e1000 parport_pc parport vmw_balloon microcode raid0 pcspkr i2c_piix4 i2c_core shpchp floppy mptspi mptscsih mptbase scsi_transport_spi [last unloaded: btrfs] [ 1076.785840] Pid: 13418, comm: btrfs-transacti Tainted: G W 3.3.0-rc4 #1 [ 1076.785842] Call Trace: [ 1076.785844] [<ffffffff8103db71>] warn_slowpath_common+0x85/0x9d [ 1076.785847] [<ffffffff8103dba3>] warn_slowpath_null+0x1a/0x1c [ 1076.785854] [<ffffffffa024c569>] btrfs_alloc_free_block+0x100/0x2c7 [btrfs] [ 1076.785864] [<ffffffffa028aa6e>] ? tree_insert+0x18a/0x1a3 [btrfs] [ 1076.785870] [<ffffffffa023d904>] __btrfs_cow_block+0x125/0x3ce [btrfs] [ 1076.785877] [<ffffffffa023e094>] btrfs_cow_block+0x108/0x153 [btrfs] [ 1076.785883] [<ffffffffa023aa7d>] ? unlock_up+0xbd/0xee [btrfs] [ 1076.785889] [<ffffffffa023fdd8>] btrfs_search_slot+0x24e/0x6a9 [btrfs] [ 1076.785898] [<ffffffffa0292ba7>] btrfs_delete_delayed_items+0x92/0x2bc [btrfs] [ 1076.786003] [<ffffffffa0293ace>] btrfs_run_delayed_items+0x92/0xfd [btrfs] [ 1076.786006] [<ffffffff8106335d>] ? __wake_up+0x44/0x4d [ 1076.786015] [<ffffffffa0257938>] btrfs_commit_transaction+0x24e/0x73e [btrfs] [ 1076.786023] [<ffffffffa0257f08>] ? join_transaction+0x2b/0x25c [btrfs] [ 1076.786026] [<ffffffff810594aa>] ? wake_up_bit+0x2a/0x2a [ 1076.786034] [<ffffffffa025261b>] transaction_kthread+0x177/0x221 [btrfs] [ 1076.786042] [<ffffffffa02524a4>] ? try_to_freeze+0x2f/0x2f [btrfs] [ 1076.786049] [<ffffffffa02524a4>] ? try_to_freeze+0x2f/0x2f [btrfs] [ 1076.786051] [<ffffffff8105901c>] kthread+0x89/0x91 [ 1076.786054] [<ffffffff814ad3e4>] kernel_thread_helper+0x4/0x10 [ 1076.786057] [<ffffffff81058f93>] ? kthread_freezable_should_stop+0x5d/0x5d [ 1076.786059] [<ffffffff814ad3e0>] ? gs_change+0x13/0x13 [ 1076.786061] ---[ end trace 1cb873a5ec9cba8e ]--- [ 1089.872305] hdparm: sending ioctl 330 to a partition! [ 1089.872309] hdparm: sending ioctl 330 to a partition! [ 1089.877585] hdparm: sending ioctl 330 to a partition! [ 1089.877590] hdparm: sending ioctl 330 to a partition! [ 1089.904504] hdparm: sending ioctl 330 to a partition! [ 1089.904508] hdparm: sending ioctl 330 to a partition! [ 1089.904510] hdparm: sending ioctl 330 to a partition! [ 1090.155788] Bridge firewalling registered [ 1091.585205] parted: sending ioctl 1261 to a partition! [ 1091.585210] parted: sending ioctl 1261 to a partition! [ 1091.585213] parted: sending ioctl 1261 to a partition! [ 1102.369204] scsi_verify_blk_ioctl: 3 callbacks suppressed [ 1102.369208] hdparm: sending ioctl 330 to a partition! [ 1102.369212] hdparm: sending ioctl 330 to a partition! [ 1102.374779] hdparm: sending ioctl 330 to a partition! [ 1102.374783] hdparm: sending ioctl 330 to a partition! [ 1102.401972] hdparm: sending ioctl 330 to a partition! [ 1102.401976] hdparm: sending ioctl 330 to a partition! [ 1102.401978] hdparm: sending ioctl 330 to a partition! [ 1103.844640] parted: sending ioctl 1261 to a partition! [ 1103.844644] parted: sending ioctl 1261 to a partition! [ 1103.844646] parted: sending ioctl 1261 to a partition! [ 1136.857984] use_block_rsv: 5 callbacks suppressed [ 1136.857989] btrfs: block rsv returned -28 [ 1136.857991] ------------[ cut here ]------------ [ 1136.858007] WARNING: at fs/btrfs/extent-tree.c:6164 btrfs_alloc_free_block+0x100/0x2c7 [btrfs]() [ 1136.858010] Hardware name: VMware Virtual Platform [ 1136.858012] Modules linked in: bridge stp llc btrfs zlib_deflate libcrc32c fuse sunrpc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput ppdev e1000 parport_pc parport vmw_balloon microcode raid0 pcspkr i2c_piix4 i2c_core shpchp floppy mptspi mptscsih mptbase scsi_transport_spi [last unloaded: btrfs] [ 1136.858041] Pid: 13418, comm: btrfs-transacti Tainted: G W 3.3.0-rc4 #1 [ 1136.858044] Call Trace: [ 1136.858055] [<ffffffff8103db71>] warn_slowpath_common+0x85/0x9d [ 1136.858059] [<ffffffff8103dba3>] warn_slowpath_null+0x1a/0x1c [ 1136.858068] [<ffffffffa024c569>] btrfs_alloc_free_block+0x100/0x2c7 [btrfs] [ 1136.858081] [<ffffffffa028aa6e>] ? tree_insert+0x18a/0x1a3 [btrfs] [ 1136.858090] [<ffffffffa023d904>] __btrfs_cow_block+0x125/0x3ce [btrfs] [ 1136.858098] [<ffffffffa023e094>] btrfs_cow_block+0x108/0x153 [btrfs] [ 1136.858106] [<ffffffffa023fdd8>] btrfs_search_slot+0x24e/0x6a9 [btrfs] [ 1136.858117] [<ffffffffa0292ba7>] btrfs_delete_delayed_items+0x92/0x2bc [btrfs] [ 1136.858128] [<ffffffffa0293ace>] btrfs_run_delayed_items+0x92/0xfd [btrfs] [ 1136.858132] [<ffffffff8106335d>] ? __wake_up+0x44/0x4d [ 1136.858143] [<ffffffffa0257938>] btrfs_commit_transaction+0x24e/0x73e [btrfs] [ 1136.858154] [<ffffffffa0257f08>] ? join_transaction+0x2b/0x25c [btrfs] [ 1136.858159] [<ffffffff810594aa>] ? wake_up_bit+0x2a/0x2a [ 1136.858168] [<ffffffffa025261b>] transaction_kthread+0x177/0x221 [btrfs] [ 1136.858178] [<ffffffffa02524a4>] ? try_to_freeze+0x2f/0x2f [btrfs] [ 1136.858186] [<ffffffffa02524a4>] ? try_to_freeze+0x2f/0x2f [btrfs] [ 1136.858190] [<ffffffff8105901c>] kthread+0x89/0x91 [ 1136.858195] [<ffffffff814ad3e4>] kernel_thread_helper+0x4/0x10 [ 1136.858199] [<ffffffff81058f93>] ? kthread_freezable_should_stop+0x5d/0x5d [ 1136.858202] [<ffffffff814ad3e0>] ? gs_change+0x13/0x13 [ 1136.858205] ---[ end trace 1cb873a5ec9cba8f ]--- [ 1139.454651] scsi_verify_blk_ioctl: 3 callbacks suppressed [ 1139.454651] hdparm: sending ioctl 330 to a partition! [ 1139.454651] hdparm: sending ioctl 330 to a partition! [ 1139.462947] hdparm: sending ioctl 330 to a partition! [ 1139.462953] hdparm: sending ioctl 330 to a partition! [ 1139.498530] hdparm: sending ioctl 330 to a partition! [ 1139.498534] hdparm: sending ioctl 330 to a partition! [ 1139.498537] hdparm: sending ioctl 330 to a partition! [ 1140.599323] parted: sending ioctl 1261 to a partition! [ 1140.599327] parted: sending ioctl 1261 to a partition! [ 1140.599329] parted: sending ioctl 1261 to a partition! [ 1196.968820] btrfs: block rsv returned -28 [ 1196.968823] ------------[ cut here ]------------ [ 1196.968839] WARNING: at fs/btrfs/extent-tree.c:6164 btrfs_alloc_free_block+0x100/0x2c7 [btrfs]() [ 1196.968841] Hardware name: VMware Virtual Platform [ 1196.968842] Modules linked in: bridge stp llc btrfs zlib_deflate libcrc32c fuse sunrpc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput ppdev e1000 parport_pc parport vmw_balloon microcode raid0 pcspkr i2c_piix4 i2c_core shpchp floppy mptspi mptscsih mptbase scsi_transport_spi [last unloaded: btrfs] [ 1196.968865] Pid: 13418, comm: btrfs-transacti Tainted: G W 3.3.0-rc4 #1 [ 1196.968867] Call Trace: [ 1196.968873] [<ffffffff8103db71>] warn_slowpath_common+0x85/0x9d [ 1196.968873] [<ffffffff8103dba3>] warn_slowpath_null+0x1a/0x1c [ 1196.968873] [<ffffffffa024c569>] btrfs_alloc_free_block+0x100/0x2c7 [btrfs] [ 1196.968873] [<ffffffffa028aa6e>] ? tree_insert+0x18a/0x1a3 [btrfs] [ 1196.968873] [<ffffffffa023d904>] __btrfs_cow_block+0x125/0x3ce [btrfs] [ 1196.968873] [<ffffffffa023e094>] btrfs_cow_block+0x108/0x153 [btrfs] [ 1196.968873] [<ffffffffa023fdd8>] btrfs_search_slot+0x24e/0x6a9 [btrfs] [ 1196.968873] [<ffffffffa0292ba7>] btrfs_delete_delayed_items+0x92/0x2bc [btrfs] [ 1196.968873] [<ffffffffa0293ace>] btrfs_run_delayed_items+0x92/0xfd [btrfs] [ 1196.968873] [<ffffffff8106335d>] ? __wake_up+0x44/0x4d [ 1196.968885] [<ffffffffa0257938>] btrfs_commit_transaction+0x24e/0x73e [btrfs] [ 1196.968896] [<ffffffffa0257f08>] ? join_transaction+0x2b/0x25c [btrfs] [ 1196.968911] [<ffffffff810594aa>] ? wake_up_bit+0x2a/0x2a [ 1196.968923] [<ffffffffa025261b>] transaction_kthread+0x177/0x221 [btrfs] [ 1196.968934] [<ffffffffa02524a4>] ? try_to_freeze+0x2f/0x2f [btrfs] [ 1196.968944] [<ffffffffa02524a4>] ? try_to_freeze+0x2f/0x2f [btrfs] [ 1196.968950] [<ffffffff8105901c>] kthread+0x89/0x91 [ 1196.968956] [<ffffffff814ad3e4>] kernel_thread_helper+0x4/0x10 [ 1196.968962] [<ffffffff81058f93>] ? kthread_freezable_should_stop+0x5d/0x5d [ 1196.968967] [<ffffffff814ad3e0>] ? gs_change+0x13/0x13 [ 1196.968970] ---[ end trace 1cb873a5ec9cba90 ]--- [ 1199.790756] scsi_verify_blk_ioctl: 3 callbacks suppressed [ 1199.790759] hdparm: sending ioctl 330 to a partition! [ 1199.790762] hdparm: sending ioctl 330 to a partition! [ 1199.796137] hdparm: sending ioctl 330 to a partition! [ 1199.796141] hdparm: sending ioctl 330 to a partition! [ 1199.823128] hdparm: sending ioctl 330 to a partition! [ 1199.823132] hdparm: sending ioctl 330 to a partition! [ 1199.823135] hdparm: sending ioctl 330 to a partition! [ 1200.905032] parted: sending ioctl 1261 to a partition! [ 1200.905036] parted: sending ioctl 1261 to a partition! [ 1200.905038] parted: sending ioctl 1261 to a partition! [ 1257.101762] use_block_rsv: 3 callbacks suppressed [ 1257.101766] btrfs: block rsv returned -28 [ 1257.101767] ------------[ cut here ]------------ [ 1257.101783] WARNING: at fs/btrfs/extent-tree.c:6164 btrfs_alloc_free_block+0x100/0x2c7 [btrfs]() [ 1257.101785] Hardware name: VMware Virtual Platform [ 1257.101786] Modules linked in: bridge stp llc btrfs zlib_deflate libcrc32c fuse sunrpc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput ppdev e1000 parport_pc parport vmw_balloon microcode raid0 pcspkr i2c_piix4 i2c_core shpchp floppy mptspi mptscsih mptbase scsi_transport_spi [last unloaded: btrfs] [ 1257.101810] Pid: 13418, comm: btrfs-transacti Tainted: G W 3.3.0-rc4 #1 [ 1257.101812] Call Trace: [ 1257.101819] [<ffffffff8103db71>] warn_slowpath_common+0x85/0x9d [ 1257.101823] [<ffffffff8103dba3>] warn_slowpath_null+0x1a/0x1c [ 1257.101831] [<ffffffffa024c569>] btrfs_alloc_free_block+0x100/0x2c7 [btrfs] [ 1257.101843] [<ffffffffa028aa6e>] ? tree_insert+0x18a/0x1a3 [btrfs] [ 1257.101851] [<ffffffffa023d904>] __btrfs_cow_block+0x125/0x3ce [btrfs] [ 1257.101858] [<ffffffffa023e094>] btrfs_cow_block+0x108/0x153 [btrfs] [ 1257.101866] [<ffffffffa023fdd8>] btrfs_search_slot+0x24e/0x6a9 [btrfs] [ 1257.101876] [<ffffffffa0292ba7>] btrfs_delete_delayed_items+0x92/0x2bc [btrfs] [ 1257.101885] [<ffffffffa0293ace>] btrfs_run_delayed_items+0x92/0xfd [btrfs] [ 1257.101889] [<ffffffff8106335d>] ? __wake_up+0x44/0x4d [ 1257.101899] [<ffffffffa0257938>] btrfs_commit_transaction+0x24e/0x73e [btrfs] [ 1257.101908] [<ffffffffa0257f08>] ? join_transaction+0x2b/0x25c [btrfs] [ 1257.101913] [<ffffffff810594aa>] ? wake_up_bit+0x2a/0x2a [ 1257.101922] [<ffffffffa025261b>] transaction_kthread+0x177/0x221 [btrfs] [ 1257.101930] [<ffffffffa02524a4>] ? try_to_freeze+0x2f/0x2f [btrfs] [ 1257.101938] [<ffffffffa02524a4>] ? try_to_freeze+0x2f/0x2f [btrfs] [ 1257.101941] [<ffffffff8105901c>] kthread+0x89/0x91 [ 1257.101945] [<ffffffff814ad3e4>] kernel_thread_helper+0x4/0x10 [ 1257.101949] [<ffffffff81058f93>] ? kthread_freezable_should_stop+0x5d/0x5d [ 1257.101951] [<ffffffff814ad3e0>] ? gs_change+0x13/0x13 [ 1257.101953] ---[ end trace 1cb873a5ec9cba91 ]--- [ 1257.101981] btrfs: block rsv returned -28 [ 1257.101982] ------------[ cut here ]------------ [ 1257.101991] WARNING: at fs/btrfs/extent-tree.c:6164 btrfs_alloc_free_block+0x100/0x2c7 [btrfs]() [ 1257.101992] Hardware name: VMware Virtual Platform [ 1257.101993] Modules linked in: bridge stp llc btrfs zlib_deflate libcrc32c fuse sunrpc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput ppdev e1000 parport_pc parport vmw_balloon microcode raid0 pcspkr i2c_piix4 i2c_core shpchp floppy mptspi mptscsih mptbase scsi_transport_spi [last unloaded: btrfs] [ 1257.102010] Pid: 13418, comm: btrfs-transacti Tainted: G W 3.3.0-rc4 #1 [ 1257.102011] Call Trace: [ 1257.102014] [<ffffffff8103db71>] warn_slowpath_common+0x85/0x9d [ 1257.102017] [<ffffffff8103dba3>] warn_slowpath_null+0x1a/0x1c [ 1257.102025] [<ffffffffa024c569>] btrfs_alloc_free_block+0x100/0x2c7 [btrfs] [ 1257.102035] [<ffffffffa028aa6e>] ? tree_insert+0x18a/0x1a3 [btrfs] [ 1257.102042] [<ffffffffa023d904>] __btrfs_cow_block+0x125/0x3ce [btrfs] [ 1257.102049] [<ffffffffa023e094>] btrfs_cow_block+0x108/0x153 [btrfs] [ 1257.102056] [<ffffffffa023fdd8>] btrfs_search_slot+0x24e/0x6a9 [btrfs] [ 1257.102065] [<ffffffffa0292ba7>] btrfs_delete_delayed_items+0x92/0x2bc [btrfs] [ 1257.102075] [<ffffffffa0293ace>] btrfs_run_delayed_items+0x92/0xfd [btrfs] [ 1257.102077] [<ffffffff8106335d>] ? __wake_up+0x44/0x4d [ 1257.102086] [<ffffffffa0257938>] btrfs_commit_transaction+0x24e/0x73e [btrfs] [ 1257.102095] [<ffffffffa0257f08>] ? join_transaction+0x2b/0x25c [btrfs] [ 1257.102098] [<ffffffff810594aa>] ? wake_up_bit+0x2a/0x2a [ 1257.102107] [<ffffffffa025261b>] transaction_kthread+0x177/0x221 [btrfs] [ 1257.102115] [<ffffffffa02524a4>] ? try_to_freeze+0x2f/0x2f [btrfs] [ 1257.102122] [<ffffffffa02524a4>] ? try_to_freeze+0x2f/0x2f [btrfs] [ 1257.102125] [<ffffffff8105901c>] kthread+0x89/0x91 [ 1257.102128] [<ffffffff814ad3e4>] kernel_thread_helper+0x4/0x10 [ 1257.102131] [<ffffffff81058f93>] ? kthread_freezable_should_stop+0x5d/0x5d [ 1257.102134] [<ffffffff814ad3e0>] ? gs_change+0x13/0x13 [ 1257.102135] ---[ end trace 1cb873a5ec9cba92 ]--- [ 1259.606979] scsi_verify_blk_ioctl: 3 callbacks suppressed [ 1259.606983] hdparm: sending ioctl 330 to a partition! [ 1259.606986] hdparm: sending ioctl 330 to a partition! [ 1259.612797] hdparm: sending ioctl 330 to a partition! [ 1259.612801] hdparm: sending ioctl 330 to a partition! [ 1259.640576] hdparm: sending ioctl 330 to a partition! [ 1259.640580] hdparm: sending ioctl 330 to a partition! [ 1259.640583] hdparm: sending ioctl 330 to a partition! [ 1260.804133] parted: sending ioctl 1261 to a partition! [ 1260.804137] parted: sending ioctl 1261 to a partition! [ 1260.804140] parted: sending ioctl 1261 to a partition! [ 1265.979700] scsi_verify_blk_ioctl: 3 callbacks suppressed [ 1265.979703] hdparm: sending ioctl 330 to a partition! [ 1265.979706] hdparm: sending ioctl 330 to a partition! [ 1265.987022] hdparm: sending ioctl 330 to a partition! [ 1265.987027] hdparm: sending ioctl 330 to a partition! [ 1266.016577] hdparm: sending ioctl 330 to a partition! [ 1266.016581] hdparm: sending ioctl 330 to a partition! [ 1266.016584] hdparm: sending ioctl 330 to a partition! [ 1266.997715] parted: sending ioctl 1261 to a partition! [ 1266.997718] parted: sending ioctl 1261 to a partition! [ 1266.997720] parted: sending ioctl 1261 to a partition! [ 1317.198945] use_block_rsv: 1 callbacks suppressed [ 1317.198948] btrfs: block rsv returned -28 [ 1317.198950] ------------[ cut here ]------------ [ 1317.198965] WARNING: at fs/btrfs/extent-tree.c:6164 btrfs_alloc_free_block+0x100/0x2c7 [btrfs]() [ 1317.198967] Hardware name: VMware Virtual Platform [ 1317.198968] Modules linked in: bridge stp llc btrfs zlib_deflate libcrc32c fuse sunrpc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput ppdev e1000 parport_pc parport vmw_balloon microcode raid0 pcspkr i2c_piix4 i2c_core shpchp floppy mptspi mptscsih mptbase scsi_transport_spi [last unloaded: btrfs] [ 1317.198992] Pid: 13418, comm: btrfs-transacti Tainted: G W 3.3.0-rc4 #1 [ 1317.198993] Call Trace: [ 1317.199001] [<ffffffff8103db71>] warn_slowpath_common+0x85/0x9d [ 1317.199004] [<ffffffff8103dba3>] warn_slowpath_null+0x1a/0x1c [ 1317.199013] [<ffffffffa024c569>] btrfs_alloc_free_block+0x100/0x2c7 [btrfs] [ 1317.199025] [<ffffffffa028aa6e>] ? tree_insert+0x18a/0x1a3 [btrfs] [ 1317.199033] [<ffffffffa023d904>] __btrfs_cow_block+0x125/0x3ce [btrfs] [ 1317.199040] [<ffffffffa023e094>] btrfs_cow_block+0x108/0x153 [btrfs] [ 1317.199047] [<ffffffffa023fdd8>] btrfs_search_slot+0x24e/0x6a9 [btrfs] [ 1317.199058] [<ffffffffa0292ba7>] btrfs_delete_delayed_items+0x92/0x2bc [btrfs] [ 1317.199068] [<ffffffffa0293ace>] btrfs_run_delayed_items+0x92/0xfd [btrfs] [ 1317.199071] [<ffffffff8106335d>] ? __wake_up+0x44/0x4d [ 1317.199082] [<ffffffffa0257938>] btrfs_commit_transaction+0x24e/0x73e [btrfs] [ 1317.199091] [<ffffffffa0257f08>] ? join_transaction+0x2b/0x25c [btrfs] [ 1317.199095] [<ffffffff810594aa>] ? wake_up_bit+0x2a/0x2a [ 1317.199105] [<ffffffffa025261b>] transaction_kthread+0x177/0x221 [btrfs] [ 1317.199113] [<ffffffffa02524a4>] ? try_to_freeze+0x2f/0x2f [btrfs] [ 1317.199121] [<ffffffffa02524a4>] ? try_to_freeze+0x2f/0x2f [btrfs] [ 1317.199124] [<ffffffff8105901c>] kthread+0x89/0x91 [ 1317.199128] [<ffffffff814ad3e4>] kernel_thread_helper+0x4/0x10 [ 1317.199131] [<ffffffff81058f93>] ? kthread_freezable_should_stop+0x5d/0x5d [ 1317.199133] [<ffffffff814ad3e0>] ? gs_change+0x13/0x13 [ 1317.199332] ---[ end trace 1cb873a5ec9cba93 ]--- [ 1317.199363] btrfs: block rsv returned -28 [ 1317.199365] ------------[ cut here ]------------ [ 1317.199375] WARNING: at fs/btrfs/extent-tree.c:6164 btrfs_alloc_free_block+0x100/0x2c7 [btrfs]() [ 1317.199378] Hardware name: VMware Virtual Platform [ 1317.199380] Modules linked in: bridge stp llc btrfs zlib_deflate libcrc32c fuse sunrpc ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipv6 uinput ppdev e1000 parport_pc parport vmw_balloon microcode raid0 pcspkr i2c_piix4 i2c_core shpchp floppy mptspi mptscsih mptbase scsi_transport_spi [last unloaded: btrfs] [ 1317.199417] Pid: 13418, comm: btrfs-transacti Tainted: G W 3.3.0-rc4 #1 [ 1317.199420] Call Trace: [ 1317.199424] [<ffffffff8103db71>] warn_slowpath_common+0x85/0x9d [ 1317.199429] [<ffffffff8103dba3>] warn_slowpath_null+0x1a/0x1c [ 1317.199438] [<ffffffffa024c569>] btrfs_alloc_free_block+0x100/0x2c7 [btrfs] [ 1317.199450] [<ffffffffa028aa6e>] ? tree_insert+0x18a/0x1a3 [btrfs] [ 1317.199459] [<ffffffffa023d904>] __btrfs_cow_block+0x125/0x3ce [btrfs] [ 1317.199490] [<ffffffffa023e094>] btrfs_cow_block+0x108/0x153 [btrfs] [ 1317.199499] [<ffffffffa023fdd8>] btrfs_search_slot+0x24e/0x6a9 [btrfs] [ 1317.199511] [<ffffffffa0292ba7>] btrfs_delete_delayed_items+0x92/0x2bc [btrfs] [ 1317.199523] [<ffffffffa0293ace>] btrfs_run_delayed_items+0x92/0xfd [btrfs] [ 1317.199528] [<ffffffff8106335d>] ? __wake_up+0x44/0x4d [ 1317.199539] [<ffffffffa0257938>] btrfs_commit_transaction+0x24e/0x73e [btrfs] [ 1317.199550] [<ffffffffa0257f08>] ? join_transaction+0x2b/0x25c [btrfs] [ 1317.199555] [<ffffffff810594aa>] ? wake_up_bit+0x2a/0x2a [ 1317.199565] [<ffffffffa025261b>] transaction_kthread+0x177/0x221 [btrfs] [ 1317.199576] [<ffffffffa02524a4>] ? try_to_freeze+0x2f/0x2f [btrfs] [ 1317.199585] [<ffffffffa02524a4>] ? try_to_freeze+0x2f/0x2f [btrfs] [ 1317.199590] [<ffffffff8105901c>] kthread+0x89/0x91 [ 1317.199596] [<ffffffff814ad3e4>] kernel_thread_helper+0x4/0x10 [ 1317.199601] [<ffffffff81058f93>] ? kthread_freezable_should_stop+0x5d/0x5d [ 1317.199606] [<ffffffff814ad3e0>] ? gs_change+0x13/0x13 [ 1317.199609] ---[ end trace 1cb873a5ec9cba94 ]--- [ 1319.792163] scsi_verify_blk_ioctl: 3 callbacks suppressed [ 1319.792167] hdparm: sending ioctl 330 to a partition! [ 1319.792169] hdparm: sending ioctl 330 to a partition! [ 1319.799333] hdparm: sending ioctl 330 to a partition! [ 1319.799338] hdparm: sending ioctl 330 to a partition! [ 1319.831399] hdparm: sending ioctl 330 to a partition! [ 1319.831404] hdparm: sending ioctl 330 to a partition! [ 1319.831407] hdparm: sending ioctl 330 to a partition! [ 1321.109665] parted: sending ioctl 1261 to a partition! [ 1321.109669] parted: sending ioctl 1261 to a partition! [ 1321.109671] parted: sending ioctl 1261 to a partition! [ 1326.438618] scsi_verify_blk_ioctl: 3 callbacks suppressed [ 1326.438621] hdparm: sending ioctl 330 to a partition! [ 1326.438624] hdparm: sending ioctl 330 to a partition! [ 1326.444554] hdparm: sending ioctl 330 to a partition! [ 1326.444558] hdparm: sending ioctl 330 to a partition! [ 1326.479212] hdparm: sending ioctl 330 to a partition! [ 1326.479217] hdparm: sending ioctl 330 to a partition! [ 1326.479219] hdparm: sending ioctl 330 to a partition! [ 1327.639153] parted: sending ioctl 1261 to a partition! [ 1327.639157] parted: sending ioctl 1261 to a partition! [ 1327.639160] parted: sending ioctl 1261 to a partition! and finally the partition cannot be unmounted and I had to reboot. well, it's probably not that important, who the hell will be deleting 10,000 subvolumes in a 2 minutes timeframe ? The script: (ps: the parallel program is not required, doing all this on a bash loop with one thread also trigger the problem for me) #!/bin/bash # # Script to reproduce a problem dismounting a filesystem # after having created 10,000 subvolume, and deleted thoses 10,000 # subvolumes. # which parallel &> /dev/null if [ $? -ne 0 ] then echo "You need the GNU \"parallel\" program. ( http://www.gnu.org/software/parallel/ )" exit 1 fi cd /data || exit 1 # should be in a btrfs filesystem mkdir test && ( cd test parallel 'btrfs subv create' ::: $(seq 0 9999 | awk '{printf("subv_%04d ",$1);}') sleep 5 # Nothing appear in dmesg while creating the 10,000 subvolumes above parallel 'btrfs subv delete' ::: * sleep 5 # Usually several kernel backtrace while running the deletes ) rmdir test echo echo "Now try to unmount the partition. never worked for me." echo cd - -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
