* [bug] Balance fails due to ENOSPC
@ 2021-01-12 10:35 Anand Jain
2021-01-12 13:44 ` Qu Wenruo
0 siblings, 1 reply; 2+ messages in thread
From: Anand Jain @ 2021-01-12 10:35 UTC (permalink / raw)
To: linux-btrfs@vger.kernel.org
Balance fails due to ENOSPC on 5.11.0-rc2+.
[ 2460.219094] BTRFS info (device sdb6): balance: start -f
-dconvert=single -mconvert=single -sconvert=single
[ 2460.219224] BTRFS info (device sdb6): relocating block group
194572713984 flags data
[ 2460.241299] ------------[ cut here ]------------
[ 2460.241302] BTRFS: Transaction aborted (error -28)
[ 2460.241328] WARNING: CPU: 3 PID: 4135 at fs/btrfs/volumes.c:3003
btrfs_remove_chunk+0x60e/0x6c0 [btrfs]
::
[ 2460.241447] RIP: 0010:btrfs_remove_chunk+0x60e/0x6c0 [btrfs]
::
[ 2460.241497] Call Trace:
[ 2460.241500] btrfs_relocate_chunk+0x9d/0xd0 [btrfs]
[ 2460.241533] __btrfs_balance+0x413/0xa30 [btrfs]
[ 2460.241566] btrfs_balance+0x436/0x4d0 [btrfs]
[ 2460.241597] btrfs_ioctl_balance+0x2d5/0x380 [btrfs]
[ 2460.241647] btrfs_ioctl+0x565/0x22b0 [btrfs]
[ 2460.241693] ? selinux_file_ioctl+0x174/0x220
[ 2460.241698] ? handle_mm_fault+0xd7/0x2b0
[ 2460.241702] __x64_sys_ioctl+0x91/0xc0
[ 2460.241705] ? __x64_sys_ioctl+0x91/0xc0
[ 2460.241707] do_syscall_64+0x38/0x50
[ 2460.241711] entry_SYSCALL_64_after_hwframe+0x44/0xa9
::
[ 2460.241735] ---[ end trace 95b8b7b84503a477 ]---
[ 2460.241738] BTRFS: error (device sdb6) in btrfs_remove_chunk:3003:
errno=-28 No space left
[ 2460.241743] BTRFS info (device sdb6): forced readonly
[ 2460.242646] BTRFS info (device sdb6): 1 enospc errors during balance
[ 2460.242649] BTRFS info (device sdb6): balance: ended with status: -30
btrfs fi us /Volumes/
Overall:
Device size: 154.97GiB
Device allocated: 154.97GiB
Device unallocated: 2.00MiB
Device missing: 0.00B
Used: 147.91GiB
Free (estimated): 2.75GiB (min: 2.75GiB)
Data ratio: 1.99
Metadata ratio: 1.52
Global reserve: 183.72MiB (used: 0.00B)
Data,single: Size:894.00MiB, Used:0.00B (0.00%)
/dev/sdb6 894.00MiB
Data,RAID1: Size:75.53GiB, Used:73.23GiB (96.96%)
/dev/sdb6 75.53GiB
/dev/sdc2 75.53GiB
Metadata,single: Size:964.00MiB, Used:0.00B (0.00%)
/dev/sdb6 964.00MiB
Metadata,RAID1: Size:1.00GiB, Used:737.25MiB (72.00%)
/dev/sdb6 1.00GiB
/dev/sdc2 1.00GiB
System,single: Size:32.00MiB, Used:0.00B (0.00%)
/dev/sdb6 32.00MiB
System,RAID1: Size:32.00MiB, Used:16.00KiB (0.05%)
/dev/sdb6 32.00MiB
/dev/sdc2 32.00MiB
Unallocated:
/dev/sdb6 1.00MiB
/dev/sdc2 1.00MiB
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [bug] Balance fails due to ENOSPC
2021-01-12 10:35 [bug] Balance fails due to ENOSPC Anand Jain
@ 2021-01-12 13:44 ` Qu Wenruo
0 siblings, 0 replies; 2+ messages in thread
From: Qu Wenruo @ 2021-01-12 13:44 UTC (permalink / raw)
To: Anand Jain, linux-btrfs@vger.kernel.org
On 2021/1/12 下午6:35, Anand Jain wrote:
>
>
> Balance fails due to ENOSPC on 5.11.0-rc2+.
>
>
> [ 2460.219094] BTRFS info (device sdb6): balance: start -f
> -dconvert=single -mconvert=single -sconvert=single
> [ 2460.219224] BTRFS info (device sdb6): relocating block group
> 194572713984 flags data
> [ 2460.241299] ------------[ cut here ]------------
> [ 2460.241302] BTRFS: Transaction aborted (error -28)
> [ 2460.241328] WARNING: CPU: 3 PID: 4135 at fs/btrfs/volumes.c:3003
> btrfs_remove_chunk+0x60e/0x6c0 [btrfs]
> ::
> [ 2460.241447] RIP: 0010:btrfs_remove_chunk+0x60e/0x6c0 [btrfs]
> ::
> [ 2460.241497] Call Trace:
> [ 2460.241500] btrfs_relocate_chunk+0x9d/0xd0 [btrfs]
> [ 2460.241533] __btrfs_balance+0x413/0xa30 [btrfs]
> [ 2460.241566] btrfs_balance+0x436/0x4d0 [btrfs]
> [ 2460.241597] btrfs_ioctl_balance+0x2d5/0x380 [btrfs]
> [ 2460.241647] btrfs_ioctl+0x565/0x22b0 [btrfs]
> [ 2460.241693] ? selinux_file_ioctl+0x174/0x220
> [ 2460.241698] ? handle_mm_fault+0xd7/0x2b0
> [ 2460.241702] __x64_sys_ioctl+0x91/0xc0
> [ 2460.241705] ? __x64_sys_ioctl+0x91/0xc0
> [ 2460.241707] do_syscall_64+0x38/0x50
> [ 2460.241711] entry_SYSCALL_64_after_hwframe+0x44/0xa9
> ::
> [ 2460.241735] ---[ end trace 95b8b7b84503a477 ]---
> [ 2460.241738] BTRFS: error (device sdb6) in btrfs_remove_chunk:3003:
> errno=-28 No space left
> [ 2460.241743] BTRFS info (device sdb6): forced readonly
> [ 2460.242646] BTRFS info (device sdb6): 1 enospc errors during balance
> [ 2460.242649] BTRFS info (device sdb6): balance: ended with status: -30
>
>
> btrfs fi us /Volumes/
> Overall:
> Device size: 154.97GiB
> Device allocated: 154.97GiB
> Device unallocated: 2.00MiB
> Device missing: 0.00B
> Used: 147.91GiB
> Free (estimated): 2.75GiB (min: 2.75GiB)
> Data ratio: 1.99
> Metadata ratio: 1.52
> Global reserve: 183.72MiB (used: 0.00B)
>
> Data,single: Size:894.00MiB, Used:0.00B (0.00%)
> /dev/sdb6 894.00MiB
>
> Data,RAID1: Size:75.53GiB, Used:73.23GiB (96.96%)
> /dev/sdb6 75.53GiB
> /dev/sdc2 75.53GiB
>
> Metadata,single: Size:964.00MiB, Used:0.00B (0.00%)
> /dev/sdb6 964.00MiB
>
> Metadata,RAID1: Size:1.00GiB, Used:737.25MiB (72.00%)
> /dev/sdb6 1.00GiB
> /dev/sdc2 1.00GiB
Metadata is only 1G, with 737M used, and 183 reserved as GlobalRSV.
Although the GlobalRSV is a little smaller than older kernel, but it
should be more or less enough.
In theory, we should be able to modify the fs stealing from GlobalRSV,
and since btrfs_remove_chunk:3003 is updating device time, either it
means we didn't really reserve enough metadata when we start the trans,
or we didn't do the steal when we really need.
Would you like to provide the dmesg if you can reproduce with "-o
enospc_debug" mount option?
Thanks,
Qu
>
> System,single: Size:32.00MiB, Used:0.00B (0.00%)
> /dev/sdb6 32.00MiB
>
> System,RAID1: Size:32.00MiB, Used:16.00KiB (0.05%)
> /dev/sdb6 32.00MiB
> /dev/sdc2 32.00MiB
>
> Unallocated:
> /dev/sdb6 1.00MiB
> /dev/sdc2 1.00MiB
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-01-12 10:35 [bug] Balance fails due to ENOSPC Anand Jain
2021-01-12 13:44 ` Qu Wenruo
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