On 2017年09月19日 23:56, Rich Rauenzahn wrote:
I've filed a bug on this kernel trace -- I get 100's of these a day.
I'd like to make them go away ....
https://bugzilla.kernel.org/show_bug.cgi?id=196949
[ 4.747356] ------------[ cut here ]------------
[ 4.747377] WARNING: CPU: 3 PID: 439 at fs/btrfs/ctree.h:1559
btrfs_update_device+0x1c5/0x1d0 [btrfs]
Is that line the following WARN_ON()?
---
static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb,
struct btrfs_dev_item *s,
u64 val)
{
BUILD_BUG_ON(sizeof(u64) !=
sizeof(((struct btrfs_dev_item *)0))->total_bytes);
WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); <<<
btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val);
}
---
If so, that means your devices size is not aligned to 4K.
Is your block device still using old 512 block size?
AFAIK nowadays most HDDs are using 4K blocksize and it's recommended to
use it.
It's not a big problem and one can easily remove the WARN_ON().
But I think we'd better fix the caller to do round_down() before calling
this function.
Thanks,
Qu
[ 4.747377] Modules linked in: nfs_acl lockd grace sunrpc ip_tables
btrfs xor raid6_pq sd_mod crc32c_intel firewire_ohci igb ahci
firewire_core crc_itu_t dca libahci i915 libata i2c_algo_bit e1000e
drm_kms_helper ptp syscopyarea sysfillrect pps_core sysimgblt f
b_sys_fops drm video
[ 4.747385] CPU: 3 PID: 439 Comm: btrfs-cleaner Not tainted
4.13.2-1.el7.elrepo.x86_64 #1
[ 4.747385] Hardware name: Supermicro X10SAE/X10SAE, BIOS 2.0a 05/09/2014
[ 4.747386] task: ffff88040cdcae80 task.stack: ffffc900021f4000
[ 4.747396] RIP: 0010:btrfs_update_device+0x1c5/0x1d0 [btrfs]
[ 4.747396] RSP: 0018:ffffc900021f7d00 EFLAGS: 00010206
[ 4.747397] RAX: 0000000000000fff RBX: ffff880407b7aa80 RCX: 0000001bc6c71e00
[ 4.747397] RDX: ffff880000000000 RSI: ffff880404cd3f3c RDI: ffff880409417b58
[ 4.747398] RBP: ffffc900021f7d48 R08: 0000000000003f60 R09: ffffc900021f7cb8
[ 4.747398] R10: 0000000000001000 R11: 0000000000000003 R12: ffff88040559f800
[ 4.747398] R13: 0000000000000000 R14: ffff880409417b58 R15: 0000000000003f3c
[ 4.747399] FS: 0000000000000000(0000) GS:ffff88041fac0000(0000)
knlGS:0000000000000000
[ 4.747399] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4.747400] CR2: 00007f29c3000248 CR3: 00000004056a4000 CR4: 00000000001406e0
[ 4.747400] Call Trace:
[ 4.747410] btrfs_remove_chunk+0x2fb/0x8b0 [btrfs]
[ 4.747418] btrfs_delete_unused_bgs+0x363/0x440 [btrfs]
[ 4.747426] cleaner_kthread+0x150/0x180 [btrfs]
[ 4.747429] kthread+0x109/0x140
[ 4.747436] ? btree_invalidatepage+0xa0/0xa0 [btrfs]
[ 4.747437] ? kthread_park+0x60/0x60
[ 4.747439] ret_from_fork+0x25/0x30
[ 4.747439] Code: 10 00 00 00 4c 89 fe e8 8a 30 ff ff 4c 89 f7 e8
32 f6 fc ff e9 d3 fe ff ff b8 f4 ff ff ff e9 d4 fe ff ff 0f 1f 00 e8
bb 2e 9e e0 <0f> ff eb af 0f 1f 80 00 00 00 00 0f 1f 44 00 00 55 31 d2
be 02
[ 4.747450] ---[ end trace 1ef80a625983d73b ]---
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