On 9/13/16 10:24 PM, Josef Bacik wrote: > On 09/08/2016 07:02 PM, Jeff Mahoney wrote: >> On 9/8/16 2:49 PM, Jeff Mahoney wrote: >>> On 9/8/16 2:24 PM, Ronan Arraes Jardim Chagas wrote: >>>> Hi all! >>>> >>>> Em Seg, 2016-09-05 às 16:49 +0800, Qu Wenruo escreveu: >>>>> Just like what Wang has mentioned, would you please paste all the >>>>> output >>>>> of the contents of /sys/fs/btrfs/<your fs uuid>/allocation? >>>>> >>>>> It's recommended to use "grep . -IR <path>" to get all the data as >>>>> it >>>>> will show the file name. >>>> >>>> So, one more time, I see the problem. This time I was just using >>>> Firefox and I cannot recover using `btrfs balance`. I think that, one >>>> more time, I will need to reboot this machine. This problem is really >>>> causing me a lot of troubles :( >>> >>> I have a hunch the list is about to be flooded with similar reports if >>> we don't find this one before 4.8. >>> >>> commit d555b6c380c644af63dbdaa7cc14bba041a4e4dd >>> Author: Josef Bacik <jbacik@xxxxxx> >>> Date: Fri Mar 25 13:25:51 2016 -0400 >>> >>> Btrfs: warn_on for unaccounted spaces >>> >>> This commit isn't the source of the bug, but it's making it a lot more >>> noisy. I spent a few hours last night trying to track down why xfstests >>> was throwing these warnings and I was able to reproduce them at least as >>> far back as 4.4-vanilla with -oenospc_debug enabled. >>> >>> Speaking of which, can you turn on mounting with -oenospc_debug if you >>> haven't already? >>> >>> In my case, space_info->bytes_may_use was getting accounted incorrectly. >>> >>> I am able to reproduce that even with the following commit: >>> commit 18513091af9483ba84328d42092bd4d42a3c958f >>> Author: Wang Xiaoguang <wangxg.fnst@xxxxxxxxxxxxxx> >>> Date: Mon Jul 25 15:51:40 2016 +0800 >>> >>> btrfs: update btrfs_space_info's bytes_may_use timely >> >> And the btrfs_free_reserved_data_space_noquota WARN_ON I was seeing is >> fixed by: >> >> commit ed7a6948394305b810d0c6203268648715e5006f >> Author: Wang Xiaoguang <wangxg.fnst@xxxxxxxxxxxxxx> >> Date: Fri Aug 26 11:33:14 2016 +0800 >> >> btrfs: do not decrease bytes_may_use when replaying extents >> >> ... which shouldn't change anything for your issue, unfortunately. >> >> I still see these: >> WARNING: CPU: 2 PID: 8166 at ../fs/btrfs/extent-tree.c:9582 >> btrfs_free_block_groups+0x2a8/0x400 [btrfs]() >> Modules linked in: loop dm_flakey af_packet iscsi_ibft iscsi_boot_sysfs >> msr ext4 crc16 mbcache jbd2 ipmi_ssif dm_mod igb ptp pps_core >> acpi_cpufreq tpm_infineon kvm_amd ipmi_si kvm dca pcspkr ipmi_msghandler >> 8250_fintek sp5100_tco fjes irqbypass i2c_piix4 shpchp processor button >> amd64_edac_mod edac_mce_amd edac_core k10temp btrfs xor raid6_pq sd_mod >> ata_generic mgag200 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect >> ohci_pci sysimgblt ehci_pci serio_raw ohci_hcd fb_sys_fops pata_atiixp >> ehci_hcd ttm ahci libahci drm usbcore libata usb_common sg scsi_mod >> autofs4 >> CPU: 2 PID: 8166 Comm: umount Tainted: G W >> 4.4.19-11.g81405db-vanilla #1 >> Hardware name: HP ProLiant DL165 G7, BIOS O37 10/17/2012 >> 0000000000000000 ffff880230317d10 ffffffff813170ec 0000000000000000 >> ffffffffa0472528 ffff880230317d48 ffffffff8107d816 0000000000000000 >> ffff88009ab03600 ffff8800ba106288 ffff8800ab75a000 ffff8800ba106200 >> Call Trace: >> [<ffffffff813170ec>] dump_stack+0x63/0x87 >> [<ffffffff8107d816>] warn_slowpath_common+0x86/0xc0 >> [<ffffffff8107d90a>] warn_slowpath_null+0x1a/0x20 >> [<ffffffffa03de3a8>] btrfs_free_block_groups+0x2a8/0x400 [btrfs] >> [<ffffffffa03ef24b>] close_ctree+0x15b/0x330 [btrfs] >> [<ffffffffa03bfeb9>] btrfs_put_super+0x19/0x20 [btrfs] >> [<ffffffff811fe5bf>] generic_shutdown_super+0x6f/0x100 >> [<ffffffff811fe662>] kill_anon_super+0x12/0x20 >> [<ffffffffa03c4fa8>] btrfs_kill_super+0x18/0x120 [btrfs] >> [<ffffffff811fe003>] deactivate_locked_super+0x43/0x70 >> [<ffffffff811fe076>] deactivate_super+0x46/0x60 >> [<ffffffff81219dcf>] cleanup_mnt+0x3f/0x80 >> [<ffffffff81219e62>] __cleanup_mnt+0x12/0x20 >> [<ffffffff81099fb6>] task_work_run+0x86/0xb0 >> [<ffffffff81078806>] exit_to_usermode_loop+0x73/0xa2 >> [<ffffffff81003b2d>] syscall_return_slowpath+0x8d/0xa0 >> [<ffffffff815f928c>] int_ret_from_sys_call+0x25/0x8f >> ---[ end trace 09a0cc2892b6305c ]--- >> BTRFS: space_info 1 has 7946240 free, is not full >> BTRFS: space_info total=8388608, used=442368, pinned=0, reserved=0, >> may_use=4096, readonly=0 >> >> ... where the value of may_use varies. >> > > What test are you seeing this with? Thanks, btrfs/022 hits it every time for me. -Jeff -- Jeff Mahoney SUSE Labs
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