I'm unsure if I already reported this particular issue in detail or not : As soon as I do start a fuzz testing BTRFS at a 32 bit qemu KVM amachine using the follwoing commands: $ mkdir /mnt/ramdisk/btrfs; truncate -s 97M /mnt/ramdisk/btrfs.fs; /sbin/mkfs.btrfs /mnt/ramdisk/btrfs.fs; sudo su -c "mount -o loop,compress=lzo /mnt/ramdisk/btrfs.fs /mnt/ramdisk/btrfs; chmod 777 /mnt/ramdisk/btrfs" SMALL VOLUME: forcing mixed metadata/data groups WARNING! - Btrfs v3.14.2 IS EXPERIMENTAL WARNING! - see http://btrfs.wiki.kernel.org before using Turning ON incompat feature 'mixed-bg': mixed data and metadata block groups Turning ON incompat feature 'extref': increased hardlink limit per file to 65536 Created a data/metadata chunk of size 8388608 fs created label (null) on /mnt/ramdisk/btrfs.fs nodesize 4096 leafsize 4096 sectorsize 4096 size 97.00MiB Btrfs v3.14.2 $ D=/mnt/ramdisk/btrfs; while [[ : ]]; do cd ~; sudo rm -rf $D/t3 && mkdir $D/t3 || break; cd $D/t3; mkdir -p v1/v2; for i in $(seq 0 99); do touch v1/v2/f$i; mkdir v1/v2/d$i; done; trinity -C 2 -N 100000 -V $D/t3/v1/v2 -q; echo; echo " done"; echo; sleep 4; done I do get this in the syslog of a kernel 3.18-rc4 : Nov 10 19:23:04 n22kvmclone kernel: INFO: trying to register non-static key. Nov 10 19:23:04 n22kvmclone kernel: the code is fine but needs lockdep annotation. Nov 10 19:23:04 n22kvmclone kernel: turning off the locking correctness validator. Nov 10 19:23:04 n22kvmclone kernel: CPU: 0 PID: 2504 Comm: trinity-c0 Not tainted 3.18.0-rc4 #5 Nov 10 19:23:04 n22kvmclone kernel: Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014 Nov 10 19:23:04 n22kvmclone kernel: 00000000 00000000 f6397b58 de84b75d def6d858 f6397b64 de848784 de9903e4 Nov 10 19:23:04 n22kvmclone kernel: f6397bdc de481185 00000000 f49c8e14 f6397ba4 00000286 f49c8df4 f6397bb0 Nov 10 19:23:04 n22kvmclone kernel: 00000286 00000000 00000001 00000286 f88fb916 f49c8e04 00000000 f5a6a694 Nov 10 19:23:04 n22kvmclone kernel: Call Trace: Nov 10 19:23:04 n22kvmclone kernel: [<de84b75d>] dump_stack+0x41/0x52 Nov 10 19:23:04 n22kvmclone kernel: [<de848784>] register_lock_class.part.40+0x32/0x36 Nov 10 19:23:04 n22kvmclone kernel: [<de481185>] __lock_acquire+0x1465/0x1930 Nov 10 19:23:04 n22kvmclone kernel: [<f88fb916>] ? set_avail_alloc_bits+0xd6/0xe0 [btrfs] Nov 10 19:23:04 n22kvmclone kernel: [<de852f32>] ? _raw_spin_unlock+0x22/0x30 Nov 10 19:23:04 n22kvmclone kernel: [<f88fb916>] ? set_avail_alloc_bits+0xd6/0xe0 [btrfs] Nov 10 19:23:04 n22kvmclone kernel: [<f890b67f>] ? btrfs_make_block_group+0x1bf/0x280 [btrfs] Nov 10 19:23:04 n22kvmclone kernel: [<de4388b0>] ? native_restore_fl+0x10/0x10 Nov 10 19:23:04 n22kvmclone kernel: [<de438890>] ? native_wbinvd+0x10/0x10 Nov 10 19:23:04 n22kvmclone kernel: [<de481708>] lock_acquire+0xb8/0x150 Nov 10 19:23:04 n22kvmclone kernel: [<f894d2f6>] ? btrfs_alloc_chunk+0x46/0x50 [btrfs] Nov 10 19:23:04 n22kvmclone kernel: [<f8949844>] __btrfs_alloc_chunk+0x624/0xa90 [btrfs] Nov 10 19:23:04 n22kvmclone kernel: [<f894d2f6>] ? btrfs_alloc_chunk+0x46/0x50 [btrfs] Nov 10 19:23:04 n22kvmclone kernel: [<f894d2f6>] btrfs_alloc_chunk+0x46/0x50 [btrfs] Nov 10 19:23:04 n22kvmclone kernel: [<f89025c9>] do_chunk_alloc+0x239/0x420 [btrfs] Nov 10 19:23:04 n22kvmclone kernel: [<de852f32>] ? _raw_spin_unlock+0x22/0x30 Nov 10 19:23:04 n22kvmclone kernel: [<f89036ce>] btrfs_check_data_free_space+0x13e/0x310 [btrfs] Nov 10 19:23:04 n22kvmclone kernel: [<f89307f3>] __btrfs_buffered_write+0x103/0x560 [btrfs] Nov 10 19:23:04 n22kvmclone kernel: [<de5095df>] ? filemap_write_and_wait_range+0x7f/0x90 Nov 10 19:23:04 n22kvmclone kernel: [<f893120f>] btrfs_file_write_iter+0x5bf/0x760 [btrfs] Nov 10 19:23:04 n22kvmclone kernel: [<de54d694>] ? do_iter_readv_writev+0x64/0x90 Nov 10 19:23:04 n22kvmclone kernel: [<de4388b0>] ? native_restore_fl+0x10/0x10 Nov 10 19:23:04 n22kvmclone kernel: [<de54d694>] do_iter_readv_writev+0x64/0x90 Nov 10 19:23:04 n22kvmclone kernel: [<f8930c50>] ? __btrfs_buffered_write+0x560/0x560 [btrfs] Nov 10 19:23:04 n22kvmclone kernel: [<de54e9e1>] do_readv_writev+0xa1/0x270 Nov 10 19:23:04 n22kvmclone kernel: [<f8930c50>] ? __btrfs_buffered_write+0x560/0x560 [btrfs] Nov 10 19:23:04 n22kvmclone kernel: [<de54d140>] ? iov_shorten+0x60/0x60 Nov 10 19:23:04 n22kvmclone kernel: [<de569dc5>] ? __fdget_pos+0x35/0x40 Nov 10 19:23:04 n22kvmclone kernel: [<de4c96a4>] ? __audit_syscall_entry+0x94/0xe0 Nov 10 19:23:04 n22kvmclone kernel: [<de4c96a4>] ? __audit_syscall_entry+0x94/0xe0 Nov 10 19:23:04 n22kvmclone kernel: [<de54ec44>] vfs_writev+0x34/0x60 Nov 10 19:23:04 n22kvmclone kernel: [<de54ed90>] SyS_writev+0x50/0xd0 Nov 10 19:23:04 n22kvmclone kernel: [<de853cfd>] syscall_call+0x7/0x7 Nov 10 19:23:26 n22kvmclone sshd[2549]: Accepted publickey for root from 192.168.1.254 port 45183 ssh2: RSA 30:da:ca:cc:77:9d:43:49:f4:a7:93:e8:3e:9b:c9:b2 -- Toralf pgp key: 0076 E94E -- 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
