Hello,
The following warning has been triggering for me since about v4.6-rc3:
WARN_ON(BTRFS_I(inode)->csum_bytes);
On one machine the warning has occurred 657 times since v4.6-rc5. On another it
has occurred 3 times since v4.6-rc3. Both are now on v4.6-rc7, where I have
still observed the warning. The warnings occur in groups, and do_unlinkat() and
evict() are always in the call stack.
Is this a known issue? Here is the first occurrence:
Apr 17 10:31:19 zzz kernel: ------------[ cut here ]------------
Apr 17 10:31:19 zzz kernel: WARNING: CPU: 0 PID: 4092 at fs/btrfs/inode.c:9261
btrfs_destroy_inode+0x23c/0x2b0
Apr 17 10:31:19 zzz kernel: Modules linked in: fuse vhost_net vhost tun bridge
stp llc ccm iptable_filter iptable_nat nf_conntrack_ipv4
Apr 17 10:31:19 zzz kernel: CPU: 0 PID: 4092 Comm: rm Tainted: G W
4.6.0-rc3 #178
Apr 17 10:31:19 zzz kernel: Hardware name: Dell Inc. Inspiron 15-7568/0M5YMV,
BIOS 01.00.00 08/07/2015
Apr 17 10:31:19 zzz kernel: 0000000000000286 0000000031dfd09a ffff8801b9277dc0
ffffffff813320d8
Apr 17 10:31:19 zzz kernel: 0000000000000000 0000000000000000 ffff8801b9277e00
ffffffff81074221
Apr 17 10:31:19 zzz kernel: 0000242d85cec000 ffff88019408c9a8 ffff88019408c9a8
ffff880085cec000
Apr 17 10:31:19 zzz kernel: Call Trace:
Apr 17 10:31:19 zzz kernel: [<ffffffff813320d8>] dump_stack+0x4d/0x65
Apr 17 10:31:19 zzz kernel: [<ffffffff81074221>] __warn+0xc1/0xe0
Apr 17 10:31:19 zzz kernel: [<ffffffff81074348>] warn_slowpath_null+0x18/0x20
Apr 17 10:31:19 zzz kernel: [<ffffffff8126e77c>]
btrfs_destroy_inode+0x23c/0x2b0
Apr 17 10:31:19 zzz kernel: [<ffffffff81185296>] destroy_inode+0x36/0x60
Apr 17 10:31:19 zzz kernel: [<ffffffff811853e4>] evict+0x124/0x180
Apr 17 10:31:19 zzz kernel: [<ffffffff81185b68>] iput+0x148/0x1d0
Apr 17 10:31:19 zzz kernel: [<ffffffff8117b884>] do_unlinkat+0x194/0x2b0
Apr 17 10:31:19 zzz kernel: [<ffffffff8117c0e6>] SyS_unlinkat+0x16/0x30
Apr 17 10:31:19 zzz kernel: [<ffffffff817031db>]
entry_SYSCALL_64_fastpath+0x13/0x8f
Apr 17 10:31:19 zzz kernel: ---[ end trace 87f6a0e10f4df484 ]---
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