Re: btrfs on sparc64 results in kernel stack trace in 1 minute test

[Anatoly Pugachev <matorola@gmail.com>]

On Thu, Jul 14, 2016 at 1:29 PM, Filipe Manana <fdmanana@gmail.com> wrote:
> On Thu, Jul 14, 2016 at 11:08 AM, Anatoly Pugachev <matorola@gmail.com> wrote:
>> Hi!
>>
>> I'm using git (describe, v4.7-rc7-16-gcf875cc) kernel,
>> with patch "fix extent buffer bitmap tests on big-endian systems", see
>> [1] (to be able to load/use btrfs module)
>>
>> and getting brtfs filesystem going to read only mode as well getting
>> kernel stack trace in 1 minute after started to copying files to fs.
>
> We've seen this happening on arm64 as well, and it's currently being
> investigated.

update,

I can't reproduce same trace on 4.7.0+ kernel (v4.7-0-g523d939) with
"big endian" patch [1] and btrfs-progs 4.7.
After about 50 minutes of cycle copy, got:

mator@nvg5120:~$ cnt=0; while true; do let cnt++; echo -n "$cnt ";
date; sleep 2; rm -rf /mnt/1/testdir; for i in  linux-2.6 gcc-6.1.0
v7.4.1a; do echo -n "$i "; rsync -a $i /mnt/1/testdir; done; done
1 Fri Jul 29 23:16:55 MSK 2016
linux-2.6 gcc-6.1.0 v7.4.1a 2 Fri Jul 29 23:34:18 MSK 2016
linux-2.6 gcc-6.1.0 v7.4.1a 3 Fri Jul 29 23:57:13 MSK 2016
rm: cannot remove '/mnt/1/testdir/linux-2.6/drivers/nvme': Directory not empty

and in logs:

Jul 30 00:05:48 nvg5120 kernel: BTRFS info (device loop0): inode
227514 still on the orphan list
Jul 30 00:06:01 nvg5120 kernel: ------------[ cut here ]------------
Jul 30 00:06:01 nvg5120 kernel: WARNING: CPU: 36 PID: 3110 at
fs/btrfs/inode.c:3215 btrfs_orphan_commit_root+0x188/0x1a0 [btrfs]
Jul 30 00:06:02 nvg5120 kernel: Modules linked in: loop btrfs
zlib_deflate sg e1000e ptp pps_core n2_crypto(+) flash sha256_generic
des_generic n2_rng rng_core sunrpc autofs4 ext4 crc16 jbd2 mbcache
raid10 raid456 libcrc32c crc32c_generic async_raid6_recov async_memcpy
async_pq raid6_pq async_xor xor async_tx raid0 multipath linear dm_mod
raid1 md_mod sd_mod mptsas scsi_transport_sas mptscsih scsi_mod
mptbase
Jul 30 00:06:02 nvg5120 kernel: CPU: 36 PID: 3110 Comm:
btrfs-transacti Tainted: G      D         4.7.0+ #51
Jul 30 00:06:02 nvg5120 kernel: Call Trace:
Jul 30 00:06:02 nvg5120 kernel:  [0000000000463e44] __warn+0xa4/0xc0
Jul 30 00:06:02 nvg5120 kernel:  [0000000010a2ae48]
btrfs_orphan_commit_root+0x188/0x1a0 [btrfs]
Jul 30 00:06:02 nvg5120 kernel:  [0000000010a214c0]
commit_fs_roots+0xa0/0x180 [btrfs]
Jul 30 00:06:02 nvg5120 kernel:  [0000000010a242d0]
btrfs_commit_transaction+0x4b0/0xd00 [btrfs]
Jul 30 00:06:02 nvg5120 kernel:  [0000000010a1cc30]
transaction_kthread+0xf0/0x1c0 [btrfs]
Jul 30 00:06:02 nvg5120 kernel:  [0000000000480ff0] kthread+0xb0/0xe0
Jul 30 00:06:02 nvg5120 kernel:  [0000000000406044] ret_from_fork+0x1c/0x2c
Jul 30 00:06:02 nvg5120 kernel:  [0000000000000000]           (null)
Jul 30 00:06:02 nvg5120 kernel: ---[ end trace ee8374e54a090229 ]---


[1]. http://www.spinics.net/lists/linux-btrfs/msg57193.html