Re: [f2fs-dev] kernel BUG at fs/f2fs/segment.c:2391 during xfstest generic/204

[Chao Yu <yuchao0@huawei.com>]

Hi Eric,

Sorry for late reply...

I only hit ENOSPC error:

QA output created by 204
line 82: echo: write error: No space left on device

What is your mkfs/mount option?

On 2019/7/30 1:41, Eric Biggers wrote:
> On xfstest generic/204 on f2fs, I'm getting a kernel BUG.
> 
> It bisects to:
> 
> 	commit 1cb50f87e10696e8cc61fb62d0d948e11b0e6dc1
> 	Author: Jaegeuk Kim <jaegeuk@kernel.org>
> 	Date:   Fri Jul 6 16:47:34 2018 -0700
> 
> 	    f2fs: do checkpoint in kill_sb
> 
> Here is the BUG, on v5.3-rc2:
> 
> generic/204 1s ... 	[10:34:22][    6.005271] run fstests generic/204 at 2019-07-29 10:34:22
> ------------[ cut here ]------------
> kernel BUG at fs/f2fs/segment.c:2391!
> invalid opcode: 0000 [#1] SMP
> CPU: 1 PID: 111 Comm: kworker/u4:2 Not tainted 5.3.0-rc2 #4
> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
> Workqueue: writeback wb_workfn (flush-254:32)
> RIP: 0010:get_new_segment fs/f2fs/segment.c:2382 [inline]
> RIP: 0010:new_curseg+0x350/0x360 fs/f2fs/segment.c:2512
> Code: 8b 7b 48 44 89 ea 41 0f af f6 e8 5b cb 06 00 41 8b 97 18 0b 00 00 41 89 c2 41 0f af d6 39 d0 0f 82 97 fe ff ff e9 a7 fd ff ff <0f> 0b 45 31 e4 45 31 ed e9 47 f2
> RSP: 0018:ffffc9000045f5c8 EFLAGS: 00010246
> RAX: 0000000000000031 RBX: ffff88807b533800 RCX: 0000000000000040
> RDX: 0000000000000031 RSI: 0000000000000000 RDI: ffff88807af35b60
> RBP: ffffc9000045f618 R08: 000000000000000a R09: 0000000000000001
> R10: ffff88807b533828 R11: 0000000000000001 R12: 0000000000000000
> R13: 0000000000000001 R14: 0000000000000000 R15: ffff888078d3c000
> FS:  0000000000000000(0000) GS:ffff88807fd00000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 000055db93c6b2d8 CR3: 0000000078c43005 CR4: 0000000000760ee0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> PKRU: 55555554
> Call Trace:
>  allocate_segment_by_default+0x9c/0x100 fs/f2fs/segment.c:2651
>  f2fs_allocate_data_block+0x1f3/0x600 fs/f2fs/segment.c:3101
>  do_write_page+0x9d/0x110 fs/f2fs/segment.c:3165
>  f2fs_do_write_node_page+0x35/0xb0 fs/f2fs/segment.c:3216
>  __write_node_page+0x290/0x660 fs/f2fs/node.c:1574
>  f2fs_sync_node_pages+0x6e1/0x790 fs/f2fs/node.c:1843
>  block_operations fs/f2fs/checkpoint.c:1225 [inline]
>  f2fs_write_checkpoint+0x282/0x920 fs/f2fs/checkpoint.c:1576
>  f2fs_sync_fs+0xc6/0x1b0 fs/f2fs/super.c:1116
>  f2fs_balance_fs_bg+0x107/0x300 fs/f2fs/segment.c:557
>  f2fs_write_node_pages+0x55/0x310 fs/f2fs/node.c:1931
>  do_writepages+0x43/0xf0 mm/page-writeback.c:2342
>  __writeback_single_inode+0x56/0x5b0 fs/fs-writeback.c:1364
>  writeback_sb_inodes+0x253/0x580 fs/fs-writeback.c:1628
>  wb_writeback+0x10f/0x480 fs/fs-writeback.c:1804
>  wb_do_writeback fs/fs-writeback.c:1949 [inline]
>  wb_workfn+0xa9/0x570 fs/fs-writeback.c:1990
>  process_one_work+0x21c/0x5c0 kernel/workqueue.c:2269
>  worker_thread+0x3a/0x3b0 kernel/workqueue.c:2415
>  kthread+0x124/0x140 kernel/kthread.c:255
>  ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
> ---[ end trace 63bbe1af16f6dd61 ]---
> RIP: 0010:get_new_segment fs/f2fs/segment.c:2382 [inline]
> RIP: 0010:new_curseg+0x350/0x360 fs/f2fs/segment.c:2512
> Code: 8b 7b 48 44 89 ea 41 0f af f6 e8 5b cb 06 00 41 8b 97 18 0b 00 00 41 89 c2 41 0f af d6 39 d0 0f 82 97 fe ff ff e9 a7 fd ff ff <0f> 0b 45 31 e4 45 31 ed e9 47 f2
> RSP: 0018:ffffc9000045f5c8 EFLAGS: 00010246
> RAX: 0000000000000031 RBX: ffff88807b533800 RCX: 0000000000000040
> RDX: 0000000000000031 RSI: 0000000000000000 RDI: ffff88807af35b60
> RBP: ffffc9000045f618 R08: 000000000000000a R09: 0000000000000001
> R10: ffff88807b533828 R11: 0000000000000001 R12: 0000000000000000
> R13: 0000000000000001 R14: 0000000000000000 R15: ffff888078d3c000
> FS:  0000000000000000(0000) GS:ffff88807fd00000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 000055db93c6b2d8 CR3: 0000000078c43005 CR4: 0000000000760ee0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> PKRU: 55555554
> 
> 
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