B.H.

On Fri, Jul 29, 2016 at 8:23 PM, Duncan [off-list ref] wrote:

quoted

So I'd recommend upgrading to the latest kernel 4.4 if you want to stay
with the stable series, or 4.6 or 4.7 if you want current, and then (less
important) upgrading the btrfs userspace as well.  It's possible the
newer kernel will handle the combined rsync and send stresses better, and
if not, you're on a better base to provide bug reports, etc.

OK, upgraded to 4.4 (Ubuntu 16.04 stock kernel) and the fresh
btrfs-progs 4.7. I'm assuming the error was due to some kind of bug or
race condition and the FS is clean. Let's see how it behaves. Thanks!

Hello, i'm still getting ENOSPC errors. The latest time the log looks like this:

Aug  4 21:55:06 yemot-4u kernel: [304090.288927] ------------[ cut
here ]------------
Aug  4 21:55:06 yemot-4u kernel: [304090.288961] WARNING: CPU: 1 PID:
4531 at /build/linux-dcxD3m/linux-4.4.0/fs/btrfs/extent-tree.c:2927
btrfs_run_delayed_refs+0x26b/0
x2a0 [btrfs]()
Aug  4 21:55:06 yemot-4u kernel: [304090.288965] BTRFS: error (device
md1) in btrfs_run_delayed_refs:2927: errno=-28 No space left
Aug  4 21:55:06 yemot-4u kernel: [304090.288968] BTRFS info (device
md1): forced readonly
Aug  4 21:55:06 yemot-4u kernel: [304090.288972] BTRFS: error (device
md1) in btrfs_run_delayed_refs:2927: errno=-28 No space left
Aug  4 21:55:06 yemot-4u kernel: [304090.289129] BTRFS: Transaction
aborted (error -28)
Aug  4 21:55:06 yemot-4u kernel: [304090.289131] Modules linked in:
binfmt_misc ipmi_ssif btrfs x86_pkg_temp_thermal intel_powerclamp
coretemp kvm_intel kvm irqbypass c
rct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul
glue_helper ablk_helper cryptd input_leds sb_edac serio_raw joydev
edac_core lpc_ich snd_hda_codec_real
tek snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core
snd_hwdep snd_pcm mei_me snd_timer mei snd soundcore shpchp ipmi_si
8250_fintek ipmi_msghandler mac_h
id nfsd auth_rpcgss nfs_acl lockd grace sunrpc lp parport autofs4
raid0 multipath linear raid456 async_raid6_recov async_memcpy async_pq
async_xor async_tx xor raid6_pq
 libcrc32c raid10 raid1 ses enclosure igb dca ast ttm drm_kms_helper
syscopyarea hid_generic sysfillrect firewire_ohci sysimgblt
fb_sys_fops ahci usbhid firewire_core p
tp psmouse libahci isci hid drm crc_itu_t libsas pps_core i2c_algo_bit
aacraid scsi_transport_sas wmi fjes
Aug  4 21:55:06 yemot-4u kernel: [304090.289201] CPU: 1 PID: 4531
Comm: kworker/u16:28 Not tainted 4.4.0-31-generic #50-Ubuntu
Aug  4 21:55:06 yemot-4u kernel: [304090.289203] Hardware name: To Be
Filled By O.E.M. To Be Filled By O.E.M./EPC602D8A, BIOS P1.20
04/16/2014
Aug  4 21:55:06 yemot-4u kernel: [304090.289226] Workqueue:
btrfs-extent-refs btrfs_extent_refs_helper [btrfs]
Aug  4 21:55:06 yemot-4u kernel: [304090.289229]  0000000000000286
00000000b56c494e ffff880744f4bc98 ffffffff813f1143
Aug  4 21:55:06 yemot-4u kernel: [304090.289232]  ffff880744f4bce0
ffffffffc06d8468 ffff880744f4bcd0 ffffffff81081102
Aug  4 21:55:06 yemot-4u kernel: [304090.289234]  ffff8807fbff3000
ffff880859b13000 ffff880729f30b90 0000000000000000
Aug  4 21:55:06 yemot-4u kernel: [304090.289237] Call Trace:
Aug  4 21:55:06 yemot-4u kernel: [304090.289244]  [<ffffffff813f1143>]
dump_stack+0x63/0x90
Aug  4 21:55:06 yemot-4u kernel: [304090.289249]  [<ffffffff81081102>]
warn_slowpath_common+0x82/0xc0
Aug  4 21:55:06 yemot-4u kernel: [304090.289252]  [<ffffffff8108119c>]
warn_slowpath_fmt+0x5c/0x80
Aug  4 21:55:06 yemot-4u kernel: [304090.289268]  [<ffffffffc063fbeb>]
btrfs_run_delayed_refs+0x26b/0x2a0 [btrfs]
Aug  4 21:55:06 yemot-4u kernel: [304090.289284]  [<ffffffffc063fc57>]
delayed_ref_async_start+0x37/0x90 [btrfs]
Aug  4 21:55:06 yemot-4u kernel: [304090.289303]  [<ffffffffc0686eaa>]
btrfs_scrubparity_helper+0xca/0x2f0 [btrfs]
Aug  4 21:55:06 yemot-4u kernel: [304090.289307]  [<ffffffff814f1906>]
? tty_ldisc_deref+0x16/0x20
Aug  4 21:55:06 yemot-4u kernel: [304090.289326]  [<ffffffffc068710e>]
btrfs_extent_refs_helper+0xe/0x10 [btrfs]
Aug  4 21:55:06 yemot-4u kernel: [304090.289330]  [<ffffffff8109a2c5>]
process_one_work+0x165/0x480
Aug  4 21:55:06 yemot-4u kernel: [304090.289333]  [<ffffffff8109a62b>]
worker_thread+0x4b/0x4c0
Aug  4 21:55:06 yemot-4u kernel: [304090.289336]  [<ffffffff8109a5e0>]
? process_one_work+0x480/0x480
Aug  4 21:55:06 yemot-4u kernel: [304090.289339]  [<ffffffff810a0808>]
kthread+0xd8/0xf0
Aug  4 21:55:06 yemot-4u kernel: [304090.289341]  [<ffffffff810a0730>]
? kthread_create_on_node+0x1e0/0x1e0
Aug  4 21:55:06 yemot-4u kernel: [304090.289345]  [<ffffffff8182decf>]
ret_from_fork+0x3f/0x70
Aug  4 21:55:06 yemot-4u kernel: [304090.289348]  [<ffffffff810a0730>]
? kthread_create_on_node+0x1e0/0x1e0
Aug  4 21:55:06 yemot-4u kernel: [304090.289350] ---[ end trace
90c37e7522254f86 ]---
Aug  4 21:55:06 yemot-4u kernel: [304090.289353] BTRFS: error (device
md1) in btrfs_run_delayed_refs:2927: errno=-28 No space left
Aug  4 21:55:06 yemot-4u kernel: [304090.328312] BTRFS: error (device
md1) in __btrfs_free_extent:6552: errno=-28 No space left
Aug  4 21:55:06 yemot-4u kernel: [304090.328344] BTRFS: error (device
md1) in btrfs_run_delayed_refs:2927: errno=-28 No space left

root@yemot-4u:~# uname -a
Linux yemot-4u 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC
2016 x86_64 x86_64 x86_64 GNU/Linux

root@yemot-4u:~# btrfs --version
btrfs-progs v4.7


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