On our SLES12 machines with 3.12.60-52.54-default, the last one available with general support, I'm seeing a lot of the following errors:


[1162618.189883] ------------[ cut here ]------------
[1162618.189912] WARNING: CPU: 2 PID: 39991 at ../fs/btrfs/extent-tree.c:3731 btrfs_free_reserved_data_space_noquota+0xe8/0x100 [btrfs]()
[1162618.189914] Modules linked in: binfmt_misc ipmi_si nfsv3 nfs_acl rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd sunrpc fscache mpt3sas mpt2sas raid_class scsi_transpor
t_sas mptctl mptbase af_packet dell_rbu(X) iscsi_ibft iscsi_boot_sysfs msr joydev hid_generic usbhid onload(OEN) sfc_char(OEN) sfc_resource(OEN) sfc_affinity(OEN) onload_cplane(POEN)
coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul sfc(OEN) iTCO_wdt iTCO_vendor_support ipmi_devintf dcdbas(X) mtd ptp pps_core mdio aesni_intel ipmi_msghandler wmi acpi_power_mete
r aes_x86_64 lpc_ich mfd_core lrw gf128mul glue_helper ablk_helper shpchp cryptd pcspkr button acpi_pad processor dm_mod btrfs xor raid6_pq sr_mod cdrom sd_mod crc32c_intel mgag200 sy
scopyarea sysfillrect sysimgblt i2c_algo_bit drm_kms_helper ttm drm ahci libahci ehci_pci ehci_hcd libata usbcore megaraid_sas usb_common sg scsi_mod autofs4 [last unloaded: ipmi_si]
[1162618.189951] Supported: No, Proprietary and Unsupported modules are loaded
[1162618.189954] CPU: 2 PID: 39991 Comm: kworker/u97:2 Tainted: P W OE NX 3.12.60-52.54-default #1
[1162618.189955] Hardware name: Dell Inc. PowerEdge R620/0GFKVD, BIOS 2.4.3 07/09/2014
[1162618.189960] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[1162618.189962] 0000000000000000 ffffffff81515330 0000000000000000 ffffffffa02d88af
[1162618.189964] ffffffff810554d2 ffff880803ace000 ffff88080440de00 0000000000001000
[1162618.189967] 0000000000001000 ffff8807b481b444 ffffffffa0243318 ffff8807b481b5d0
[1162618.189969] Call Trace:
[1162618.189979] [<ffffffff8100475d>] dump_trace+0x7d/0x2d0
[1162618.189982] [<ffffffff81004a44>] show_stack_log_lvl+0x94/0x170
[1162618.189985] [<ffffffff81005cf1>] show_stack+0x21/0x50
[1162618.189990] [<ffffffff81515330>] dump_stack+0x5d/0x78
[1162618.189995] [<ffffffff810554d2>] warn_slowpath_common+0x82/0xc0
[1162618.190006] [<ffffffffa0243318>] btrfs_free_reserved_data_space_noquota+0xe8/0x100 [btrfs]
[1162618.190038] [<ffffffffa025edcf>] btrfs_clear_bit_hook+0x22f/0x2f0 [btrfs]
[1162618.190085] [<ffffffffa02771fc>] clear_state_bit+0x5c/0x1e0 [btrfs]
[1162618.190143] [<ffffffffa0277bf6>] __clear_extent_bit+0x2b6/0x400 [btrfs]
[1162618.190201] [<ffffffffa0278c1f>] extent_clear_unlock_delalloc+0x5f/0x250 [btrfs]
[1162618.190260] [<ffffffffa026179c>] cow_file_range+0x29c/0x480 [btrfs]
[1162618.190304] [<ffffffffa026286a>] run_delalloc_range+0x35a/0x390 [btrfs]
[1162618.190350] [<ffffffffa02794de>] writepage_delalloc.isra.39+0xfe/0x160 [btrfs]
[1162618.190408] [<ffffffffa027a1a1>] __extent_writepage+0xc1/0x2e0 [btrfs]
[1162618.190466] [<ffffffffa027a66f>] extent_write_cache_pages.isra.33.constprop.55+0x2a f/0x360 [btrfs]
[1162618.190526] [<ffffffffa027c57d>] extent_writepages+0x4d/0x60 [btrfs]
[1162618.190577] [<ffffffff811cab69>] __writeback_single_inode+0x39/0x2b0
[1162618.190581] [<ffffffff811cb8c4>] writeback_sb_inodes+0x1a4/0x400
[1162618.190585] [<ffffffff811cbbb6>] __writeback_inodes_wb+0x96/0xc0
[1162618.190588] [<ffffffff811cbe63>] wb_writeback+0x283/0x330
[1162618.190592] [<ffffffff811cd66c>] bdi_writeback_workfn+0x1dc/0x480
[1162618.190596] [<ffffffff81070264>] process_one_work+0x174/0x460
[1162618.190600] [<ffffffff81070f1a>] worker_thread+0x11a/0x3c0
[1162618.190603] [<ffffffff81077884>] kthread+0xb4/0xc0
[1162618.190607] [<ffffffff81523598>] ret_from_fork+0x58/0x90
[1162618.190610] ---[ end trace 35b94503d0123787 ]---


I see kernel-default-3.12.61-52.66.1.x86_64.rpm is available for SLES12 LTSS and has a lot of BTRFS bugfixes. What options do I have for gaining access and being able to download to test that?