Dear Wang,

can't use v4.8.0 as i always get OOMs and total machine crashes.

Complete traces with your patch and some more btrfs patches applied (in
the hope in fixes the OOM but it did not):
http://pastebin.com/raw/6vmRSDm1

Greets,
Stefan
Am 06.10.2016 um 05:04 schrieb Wang Xiaoguang:
> Hi,
> 
> On 09/29/2016 03:27 PM, Stefan Priebe - Profihost AG wrote:
>> Am 29.09.2016 um 09:13 schrieb Wang Xiaoguang:
>>>>> I found that compress sometime report ENOSPC error even in 4.8-rc8,
>>>>> currently
>>>> I cannot confirm that as i do not have anough space to test this
>>>> without
>>>> compression ;-( But yes i've compression enabled.
>>> I might not get you, my poor english :)
>>> You mean that you only get ENOSPC error when compression is enabled?
>>>
>>> And when compression is not enabled, you do not get ENOSPC error?
>> I can't tell you. I cannot test with compression not enabled. I do not
>> have anough free space on this disk.
> I had just sent two patches to fix false enospc error for compression,
> please have a try, they fix false enospc error in my test environment.
>         btrfs: fix false enospc for compression
>         btrfs: improve inode's outstanding_extents computation
> 
> I apply these two patchs in linux upstream tree, the latest commit
> is 41844e36206be90cd4d962ea49b0abc3612a99d0.
> 
> Regards,
> Xiaoguang Wang
> 
>>
>>>>> I'm trying to fix it.
>>>> That sounds good but do you also get the
>>>> BTRFS: space_info 4 has 18446742286429913088 free, is not full
>>>>
>>>> kernel messages on umount? if not you might have found another problem.
>>> Yes, I seem similar messages, you can paste you whole dmesg info here.
>> ------------[ cut here ]------------
>> WARNING: CPU: 2 PID: 5187 at fs/btrfs/extent-tree.c:5790
>> btrfs_free_block_groups+0x346/0x430 [btrfs]()
>> Modules linked in: netconsole xt_multiport iptable_filter ip_tables
>> x_tables 8021q garp bonding x86_pkg_temp_thermal coretemp kvm_intel kvm
>> irqbypass sb_edac crc32_pclmul edac_core i2c_i801 i40e(O) vxlan
>> ip6_udp_tunnel udp_tunnel shpchp ipmi_si ipmi_msghandler button loop
>> btrfs dm_mod raid10 raid0 multipath linear raid456 async_raid6_recov
>> async_memcpy async_pq async_xor async_tx xor raid6_pq igb i2c_algo_bit
>> i2c_core usbhid raid1 md_mod xhci_pci sg ehci_pci xhci_hcd ehci_hcd
>> sd_mod ahci usbcore ptp libahci usb_common pps_core aacraid
>> CPU: 2 PID: 5187 Comm: umount Tainted: G O 4.4.22+63-ph #1
>> Hardware name: Supermicro Super Server/X10SRi-F, BIOS 2.0 12/17/2015
>> 0000000000000000 ffff880fda777d00 ffffffff813b69c3 0000000000000000
>> ffffffffc067a099 ffff880fda777d38 ffffffff810821c6 0000000000000000
>> ffff880074bf0a00 ffff88103c10c088 ffff88103c10c000 ffff88103c10c098
>> Call Trace:
>> [<ffffffff813b69c3>] dump_stack+0x63/0x90
>> [<ffffffff810821c6>] warn_slowpath_common+0x86/0xc0
>> [<ffffffff810822ba>] warn_slowpath_null+0x1a/0x20
>> [<ffffffffc05de9a6>] btrfs_free_block_groups+0x346/0x430 [btrfs]
>> [<ffffffffc05f0bad>] close_ctree+0x15d/0x330 [btrfs]
>> [<ffffffffc05bf409>] btrfs_put_super+0x19/0x20 [btrfs]
>> [<ffffffff811c85af>] generic_shutdown_super+0x6f/0x100
>> [<ffffffff811c8652>] kill_anon_super+0x12/0x20
>> [<ffffffffc05c0376>] btrfs_kill_super+0x16/0xa0 [btrfs]
>> [<ffffffff811c7ff3>] deactivate_locked_super+0x43/0x70
>> [<ffffffff811c807c>] deactivate_super+0x5c/0x60
>> [<ffffffff811e3b5f>] cleanup_mnt+0x3f/0x90
>> [<ffffffff811e3bf2>] __cleanup_mnt+0x12/0x20
>> [<ffffffff8109dad1>] task_work_run+0x81/0xa0
>> [<ffffffff810021c0>] exit_to_usermode_loop+0xb0/0xc0
>> [<ffffffff81002b44>] syscall_return_slowpath+0xd4/0x130
>> [<ffffffff8169dc0c>] int_ret_from_sys_call+0x25/0x8f
>> ---[ end trace cee6ace13018e13e ]---
>> ------------[ cut here ]------------
>> WARNING: CPU: 2 PID: 5187 at fs/btrfs/extent-tree.c:5791
>> btrfs_free_block_groups+0x365/0x430 [btrfs]()
>> Modules linked in: netconsole xt_multiport iptable_filter ip_tables
>> x_tables 8021q garp bonding x86_pkg_temp_thermal coretemp kvm_intel kvm
>> irqbypass sb_edac crc32_pclmul edac_core i2c_i801 i40e(O) vxlan
>> ip6_udp_tunnel udp_tunnel shpchp ipmi_si ipmi_msghandler button loop
>> btrfs dm_mod raid10 raid0 multipath linear raid456 async_raid6_recov
>> async_memcpy async_pq async_xor async_tx xor raid6_pq igb i2c_algo_bit
>> i2c_core usbhid raid1 md_mod xhci_pci sg ehci_pci xhci_hcd ehci_hcd
>> sd_mod ahci usbcore ptp libahci usb_common pps_core aacraid
>> CPU: 2 PID: 5187 Comm: umount Tainted: G W O 4.4.22+63-ph #1
>> Hardware name: Supermicro Super Server/X10SRi-F, BIOS 2.0 12/17/2015
>> 0000000000000000 ffff880fda777d00 ffffffff813b69c3 0000000000000000
>> ffffffffc067a099 ffff880fda777d38 ffffffff810821c6 0000000000000000
>> ffff880074bf0a00 ffff88103c10c088 ffff88103c10c000 ffff88103c10c098
>> Call Trace:
>> [<ffffffff813b69c3>] dump_stack+0x63/0x90
>> [<ffffffff810821c6>] warn_slowpath_common+0x86/0xc0
>> [<ffffffff810822ba>] warn_slowpath_null+0x1a/0x20
>> [<ffffffffc05de9c5>] btrfs_free_block_groups+0x365/0x430 [btrfs]
>> [<ffffffffc05f0bad>] close_ctree+0x15d/0x330 [btrfs]
>> [<ffffffffc05bf409>] btrfs_put_super+0x19/0x20 [btrfs]
>> [<ffffffff811c85af>] generic_shutdown_super+0x6f/0x100
>> [<ffffffff811c8652>] kill_anon_super+0x12/0x20
>> [<ffffffffc05c0376>] btrfs_kill_super+0x16/0xa0 [btrfs]
>> [<ffffffff811c7ff3>] deactivate_locked_super+0x43/0x70
>> [<ffffffff811c807c>] deactivate_super+0x5c/0x60
>> [<ffffffff811e3b5f>] cleanup_mnt+0x3f/0x90
>> [<ffffffff811e3bf2>] __cleanup_mnt+0x12/0x20
>> [<ffffffff8109dad1>] task_work_run+0x81/0xa0
>> [<ffffffff810021c0>] exit_to_usermode_loop+0xb0/0xc0
>> [<ffffffff81002b44>] syscall_return_slowpath+0xd4/0x130
>> [<ffffffff8169dc0c>] int_ret_from_sys_call+0x25/0x8f
>> ---[ end trace cee6ace13018e13f ]---
>> ------------[ cut here ]------------
>> WARNING: CPU: 2 PID: 5187 at fs/btrfs/extent-tree.c:10151
>> btrfs_free_block_groups+0x291/0x430 [btrfs]()
>> Modules linked in: netconsole xt_multiport iptable_filter ip_tables
>> x_tables 8021q garp bonding x86_pkg_temp_thermal coretemp kvm_intel kvm
>> irqbypass sb_edac crc32_pclmul edac_core i2c_i801 i40e(O) vxlan
>> ip6_udp_tunnel udp_tunnel shpchp ipmi_si ipmi_msghandler button loop
>> btrfs dm_mod raid10 raid0 multipath linear raid456 async_raid6_recov
>> async_memcpy async_pq async_xor async_tx xor raid6_pq igb i2c_algo_bit
>> i2c_core usbhid raid1 md_mod xhci_pci sg ehci_pci xhci_hcd ehci_hcd
>> sd_mod ahci usbcore ptp libahci usb_common pps_core aacraid
>> CPU: 2 PID: 5187 Comm: umount Tainted: G W O 4.4.22+63-ph #1
>> Hardware name: Supermicro Super Server/X10SRi-F, BIOS 2.0 12/17/2015
>> 0000000000000000 ffff880fda777d00 ffffffff813b69c3 0000000000000000
>> ffffffffc067a099 ffff880fda777d38 ffffffff810821c6 ffff880074bf0000
>> ffff880074bf0088 ffff880074bf0df8 ffff88103c10c000 0000000000000000
>> Call Trace:
>> [<ffffffff813b69c3>] dump_stack+0x63/0x90
>> [<ffffffff810821c6>] warn_slowpath_common+0x86/0xc0
>> [<ffffffff810822ba>] warn_slowpath_null+0x1a/0x20
>> [<ffffffffc05de8f1>] btrfs_free_block_groups+0x291/0x430 [btrfs]
>> [<ffffffffc05f0bad>] close_ctree+0x15d/0x330 [btrfs]
>> [<ffffffffc05bf409>] btrfs_put_super+0x19/0x20 [btrfs]
>> [<ffffffff811c85af>] generic_shutdown_super+0x6f/0x100
>> [<ffffffff811c8652>] kill_anon_super+0x12/0x20
>> [<ffffffffc05c0376>] btrfs_kill_super+0x16/0xa0 [btrfs]
>> [<ffffffff811c7ff3>] deactivate_locked_super+0x43/0x70
>> [<ffffffff811c807c>] deactivate_super+0x5c/0x60
>> [<ffffffff811e3b5f>] cleanup_mnt+0x3f/0x90
>> [<ffffffff811e3bf2>] __cleanup_mnt+0x12/0x20
>> [<ffffffff8109dad1>] task_work_run+0x81/0xa0
>> [<ffffffff810021c0>] exit_to_usermode_loop+0xb0/0xc0
>> [<ffffffff81002b44>] syscall_return_slowpath+0xd4/0x130
>> [<ffffffff8169dc0c>] int_ret_from_sys_call+0x25/0x8f
>> ---[ end trace cee6ace13018e140 ]---
>> BTRFS: space_info 4 has 18446742182612910080 free, is not full
>> BTRFS: space_info total=82678120448, used=64784695296, pinned=0,
>> reserved=0, may_use=1908990066688, readonly=0
>>
>> Greets,
>> Stefan
>>
>>> Regards,
>>> Xiaoguang Wang
>>>
>>>> Stefan
>>>>
>>>>> Regards,
>>>>> Xiaoguang Wang
>>>>>
>>>>>> I tried hard to reproduce it but i can't get it to reproduce with a
>>>>>> test
>>>>>> script. Any ideas?
>>>>>>
>>>>>> Stefan
>>>>>>
>>>>>>> Reagrds,
>>>>>>> Xiaoguang Wang
>>>>>>>
>>>>>>>> Greets,
>>>>>>>> Stefan
>>>>>>>>
>>>>>>>>> Regards,
>>>>>>>>> Xiaoguang Wang
>>>>>>>>>> Greets,
>>>>>>>>>> Stefan
>>>>>>>>>> -- 
>>>>>>>>>> To unsubscribe from this list: send the line "unsubscribe
>>>>>>>>>> linux-btrfs" in
>>>>>>>>>> the body of a message to majord...@vger.kernel.org
>>>>>>>>>> More majordomo info at 
>>>>>>>>>> http://vger.kernel.org/majordomo-info.html
>>>>>>>>>>
>>>>>>>>>>
>>>>>
>>>
>>>
>>
> 
> 
> 
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