btrfs on sparc64 results in kernel stack trace in 1 minute test
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.
Here's my steps to reproduce:
create a ramdisk and file on it
root@nvg5120:# mount -t tmpfs tmpfs -o size=8G /ramdisk
root@nvg5120:# dd if=/dev/zero of=/ramdisk/disk0 bs=1M count=7000
create btrfs filesystem
root@nvg5120:/home/mator/btrfs-progs# ./mkfs.btrfs /ramdisk/disk0
btrfs-progs v4.6.1
See http://btrfs.wiki.kernel.org for more information.
Label: (null)
UUID: 81500fe0-da01-44dd-8fa6-d43646dd4916
Node size: 16384
Sector size: 8192
Filesystem size: 6.84GiB
Block group profiles:
Data: single 8.00MiB
Metadata: DUP 358.00MiB
System: DUP 12.00MiB
SSD detected: no
Incompat features: extref, skinny-metadata
Number of devices: 1
Devices:
ID SIZE PATH
1 6.84GiB /ramdisk/disk0
mount it and start to copy files:
root@nvg5120:/home/mator/btrfs-progs# mount /ramdisk/disk0 /mnt
root@nvg5120:/home/mator/btrfs-progs# mkdir /mnt/1
root@nvg5120:/home/mator/btrfs-progs# chown mator /mnt/1
mator@nvg5120:~$ cnt=0; while true; do let cnt++; echo -n "$cnt ";
date; sleep 2; rm -rf /mnt/1/testdir; rsync -a debian-installer
linux-2.6 gcc-6.1.0 v7.4.1a /mnt/1/testdir; [ $? != 0 ] && break;
done; date
1 Thu Jul 14 12:37:39 MSK 2016
rsync: rename "/mnt/1/testdir/gcc-6.1.0/gcc/testsuite/g++.dg/cpp0x/.variadic13.C.g2qPwQ"
-> "gcc-6.1.0/gcc/testsuite/g++.dg/cpp0x/variadic13.C": No such file
or directory (2)
...
rsync: mkstemp "/mnt/1/testdir/gcc-6.1.0/gcc/testsuite/g++.dg/torture/.pr33134.C.Y2O2ac"
failed: Read-only file system (30)
rsync error: received SIGINT, SIGTERM, or SIGHUP (code 20) at
io.c(504) [generator=3.1.1]
rsync: [generator] write error: Broken pipe (32)
Thu Jul 14 12:38:37 MSK 2016
root@nvg5120:/home/mator/btrfs-progs# journalctl -k -f
-- Logs begin at Mon 2016-04-18 15:59:04 MSK. --
Jul 14 12:37:29 nvg5120 kernel: loop: module loaded
Jul 14 12:37:30 nvg5120 kernel: BTRFS: device fsid
81500fe0-da01-44dd-8fa6-d43646dd4916 devid 1 transid 5 /dev/loop0
Jul 14 12:37:30 nvg5120 kernel: BTRFS info (device loop0): disk space
caching is enabled
Jul 14 12:37:30 nvg5120 kernel: BTRFS info (device loop0): has skinny extents
Jul 14 12:37:30 nvg5120 kernel: BTRFS info (device loop0): flagging fs
with big metadata feature
Jul 14 12:37:30 nvg5120 kernel: BTRFS info (device loop0): creating UUID tree
Jul 14 12:38:32 nvg5120 kernel: ------------[ cut here ]------------
Jul 14 12:38:32 nvg5120 kernel: WARNING: CPU: 12 PID: 11815 at
fs/btrfs/inode.c:9832 btrfs_rename2+0x300/0x1300 [btrfs]
Jul 14 12:38:32 nvg5120 kernel: BTRFS: Transaction aborted (error -2)
Jul 14 12:38:33 nvg5120 kernel: Modules linked in: loop btrfs sg
n2_rng rng_core n2_crypto flash sha256_generic des_generic autofs4
ext4 crc16 jbd2 mbcache zlib_deflate raid10 raid456 async_raid6_recov
async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c
crc32c_generic raid0 multipath linear dm_mod raid1 md_mod sd_mod
mptsas scsi_transport_sas mptscsih scsi_mod mptbase e1000e ptp
pps_core [last unloaded: btrfs]
Jul 14 12:38:33 nvg5120 kernel: CPU: 12 PID: 11815 Comm: rsync
Tainted: G W 4.7.0-rc7+ #45
Jul 14 12:38:33 nvg5120 kernel: Call Trace:
Jul 14 12:38:33 nvg5120 kernel: [00000000004671c0] __warn+0xc0/0xe0
Jul 14 12:38:33 nvg5120 kernel: [0000000000467214] warn_slowpath_fmt+0x34/0x60
Jul 14 12:38:33 nvg5120 kernel: [0000000011a8c340]
btrfs_rename2+0x300/0x1300 [btrfs]
Jul 14 12:38:33 nvg5120 kernel: [00000000005e38f0] vfs_rename+0x630/0x980
Jul 14 12:38:33 nvg5120 kernel: [00000000005e9404] SyS_renameat2+0x484/0x500
Jul 14 12:38:33 nvg5120 kernel: [00000000005e94dc] SyS_rename+0x1c/0x40
Jul 14 12:38:33 nvg5120 kernel: [00000000004061f4]
linux_sparc_syscall+0x34/0x44
Jul 14 12:38:33 nvg5120 kernel: ---[ end trace 92caaac5f44fc009 ]---
Jul 14 12:38:34 nvg5120 kernel: BTRFS: error (device loop0) in
btrfs_rename:9832: errno=-2 No such entry
Jul 14 12:38:34 nvg5120 kernel: BTRFS info (device loop0): forced readonly
Thanks.
PS: I can provide machine access to debug this issue (as well access
to serial management console, if it hangs).
1. http://www.mail-archive.com/linux-btrfs@vger.kernel.org/msg55792.html
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