btrfs + dmcrypt + compress=lzo + autodefrag = corruption at first boot
So discard is not the culprit. Will try to remove compress=lzo and
autodefrag and see if it still happens.
[ 748.224346] BTRFS error (device dm-0): memmove bogus src_offset 5431
move len 4294962894 len 16384
[ 748.226206] ------------[ cut here ]------------
[ 748.227831] kernel BUG at fs/btrfs/extent_io.c:5723!
[ 748.229498] invalid opcode: 0000 [#1] PREEMPT SMP
[ 748.231161] Modules linked in: ext4 mbcache jbd2 nls_iso8859_1
nls_cp437 vfat fat snd_hda_codec_hdmi dell_laptop dcdbas dell_wmi
iTCO_wdt iTCO_vendor_support intel_rapl x86_pkg_temp_thermal
intel_powerclamp coretemp kvm_intel arc4 kvm irqbypass psmouse serio_raw
pcspkr elan_i2c snd_soc_ssm4567 snd_soc_rt286 snd_soc_rl6347a
snd_soc_core i2c_hid iwlmvm snd_compress snd_pcm_dmaengine ac97_bus
mac80211 uvcvideo videobuf2_vmalloc btusb videobuf2_memops cdc_ether
btrtl usbnet iwlwifi btbcm videobuf2_v4l2 btintel intel_pch_thermal
videobuf2_core i2c_i801 videodev r8152 rtsx_pci_ms cfg80211 bluetooth
visor media mii memstick joydev evdev mousedev input_leds rfkill mac_hid
crc16 i915 fan thermal wmi dw_dmac int3403_thermal video dw_dmac_core
drm_kms_helper snd_soc_sst_acpi i2c_designware_platform
snd_soc_sst_match
[ 748.237203] snd_hda_intel 8250_dw i2c_designware_core gpio_lynxpoint
spi_pxa2xx_platform drm int3402_thermal snd_hda_codec battery tpm_crb
intel_hid snd_hda_core sparse_keymap fjes snd_hwdep int3400_thermal
acpi_thermal_rel tpm_tis snd_pcm intel_gtt tpm acpi_als syscopyarea
sysfillrect snd_timer sysimgblt fb_sys_fops mei_me i2c_algo_bit
processor_thermal_device kfifo_buf processor snd industrialio acpi_pad
ac int340x_thermal_zone mei intel_soc_dts_iosf button lpc_ich soundcore
shpchp sch_fq_codel ip_tables x_tables btrfs xor raid6_pq
jitterentropy_rng sha256_ssse3 sha256_generic hmac drbg ansi_cprng
algif_skcipher af_alg uas usb_storage dm_crypt dm_mod sd_mod
rtsx_pci_sdmmc atkbd libps2 crct10dif_pclmul crc32_pclmul crc32c_intel
ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper
[ 748.244176] ablk_helper cryptd ahci libahci libata scsi_mod xhci_pci
rtsx_pci xhci_hcd i8042 serio sdhci_acpi sdhci led_class mmc_core pl2303
mos7720 usbserial parport hid_generic usbhid hid usbcore usb_common
[ 748.246662] CPU: 0 PID: 2316 Comm: pacman Not tainted 4.5.1-1-ARCH #1
[ 748.249123] Hardware name: Dell Inc. XPS 13 9343/0F5KF3, BIOS A07
11/11/2015
[ 748.251576] task: ffff8800d9d98e40 ti: ffff8800cec10000 task.ti:
ffff8800cec10000
[ 748.254064] RIP: 0010:[<ffffffffa0300bac>] [<ffffffffa0300bac>]
memmove_extent_buffer+0x10c/0x110 [btrfs]
[ 748.256600] RSP: 0018:ffff8800cec13c18 EFLAGS: 00010246
[ 748.259120] RAX: 0000000000000000 RBX: ffff88020c01ba40 RCX:
0000000000000056
[ 748.261631] RDX: 0000000000000000 RSI: ffff88021e40db38 RDI:
ffff88021e40db38
[ 748.264166] RBP: ffff8800cec13c48 R08: 0000000000000000 R09:
000000000000033b
[ 748.266716] R10: 0000000000000000 R11: 000000000000033b R12:
00000000ffffeece
[ 748.269267] R13: 0000000100000405 R14: 00000001000004c9 R15:
ffff88020c01ba40
[ 748.271818] FS: 00007f14d4271740(0000) GS:ffff88021e400000(0000)
knlGS:0000000000000000
[ 748.274392] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 748.276987] CR2: 0000000001630008 CR3: 00000000cffc8000 CR4:
00000000003406f0
[ 748.279603] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 748.282220] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 748.284815] Stack:
[ 748.287422] 00000000e3438cd2 ffff88020c01ba40 00000000000000c4
000000000000002a
[ 748.290082] 000000000000006b 00000000000003a0 ffff8800cec13ce8
ffffffffa02b612c
[ 748.292754] ffffffffa02b433d ffff8800da9ca820 0000002800000000
ffff8800daa78bd0
[ 748.295441] Call Trace:
[ 748.298104] [<ffffffffa02b612c>] btrfs_del_items+0x33c/0x4a0 [btrfs]
[ 748.300827] [<ffffffffa02b433d>] ? btrfs_search_slot+0x90d/0x990
[btrfs]
[ 748.303564] [<ffffffffa02f3d9c>] ? btrfs_get_token_8+0x6c/0x130
[btrfs]
[ 748.306311] [<ffffffffa02e5ca9>]
btrfs_truncate_inode_items+0x649/0xd20 [btrfs]
[ 748.309071] [<ffffffffa0330b5e>] ?
btrfs_delayed_inode_release_metadata.isra.1+0x4e/0xf0 [btrfs]
[ 748.311860] [<ffffffffa02e7315>] btrfs_evict_inode+0x485/0x5d0
[btrfs]
[ 748.314627] [<ffffffff81207e55>] evict+0xc5/0x190
[ 748.317412] [<ffffffff81208689>] iput+0x1d9/0x260
[ 748.320199] [<ffffffff811fd689>] do_unlinkat+0x199/0x2d0
[ 748.322988] [<ffffffff811fdf66>] SyS_unlink+0x16/0x20
[ 748.325781] [<ffffffff815ad6ae>] entry_SYSCALL_64_fastpath+0x12/0x6d
[ 748.328584] Code: 41 5e 41 5f 5d c3 48 8b 7f 18 48 89 f2 48 c7 c6 40
44 36 a0 e8 06 90 fa ff 0f 0b 48 8b 7f 18 48 c7 c6 08 44 36 a0 e8 f4 8f
fa ff <0f> 0b 66 90 0f 1f 44 00 00 55 48 89 e5 41 55 41 54 53 48 89 fb
[ 748.331558] RIP [<ffffffffa0300bac>]
memmove_extent_buffer+0x10c/0x110 [btrfs]
[ 748.334473] RSP <ffff8800cec13c18>
[ 748.356077] ---[ end trace 9bfb28800ab52273 ]---
[ 748.359042] note: pacman[2316] exited with preempt_count 2
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