On Fri, Jul 5, 2019 at 02:59, Luke Carrier <luke@xxxxxxxxxx>: > > Hi, > > Please forgive the support request, but our attempts to escalate this via > Azure support haven't gotten very far. > > We're running an Ubuntu mainline kernel on these hosts at the moment and are > willing to try running future mainline kernels to help test: > > $ cat /etc/*release > DISTRIB_ID=Ubuntu > DISTRIB_RELEASE=18.04 > DISTRIB_CODENAME=bionic > DISTRIB_DESCRIPTION="Ubuntu 18.04.2 LTS" > NAME="Ubuntu" > VERSION="18.04.2 LTS (Bionic Beaver)" > ID=ubuntu > ID_LIKE=debian > PRETTY_NAME="Ubuntu 18.04.2 LTS" > VERSION_ID="18.04" > HOME_URL="https://www.ubuntu.com/"; > SUPPORT_URL="https://help.ubuntu.com/"; > BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"; > PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"; > VERSION_CODENAME=bionic > UBUNTU_CODENAME=bionic > > $ uname -a > Linux lp-prod-combi0 5.2.0-050200rc7-generic #201906300430 SMP Sun > Jun 30 04:32:31 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux > > We're running 6 application servers which each have 5 Azure Files shares > mounted. Periodically we see the following in the kernel ring buffer, followed > by one of the mount points becoming inaccessible (note DISCONNECTED below). > > [ 863.501076] general protection fault: 0000 [#1] SMP PTI > [ 863.504674] CPU: 0 PID: 1166 Comm: cifsd Not tainted > 5.2.0-050200rc7-generic #201906300430 > [ 863.504674] Hardware name: Microsoft Corporation Virtual > Machine/Virtual Machine, BIOS 090007 06/02/2017 > [ 863.504674] RIP: 0010:cifs_reconnect+0x2ff/0xc40 [cifs] > [ 863.504674] Code: b7 f7 c2 da f6 05 64 05 0b 00 01 74 05 0f 1f > 44 00 00 48 8b 7d a8 48 8b 07 49 89 c4 4c 39 f7 75 05 eb 2a 49 89 c4 > 48 8b 57 08 <48> 89 50 08 48 89 02 48 8b 47 48 48 89 3f 48 89 7f 08 e8 > aa 84 fa > [ 863.504674] RSP: 0018:ffffbda3c1fa3d38 EFLAGS: 00010297 > [ 863.551092] RAX: 21e5544f6ba67674 RBX: ffff99e9efdf6800 RCX: > 0000000000000000 > [ 863.551092] RDX: ffff99e91a831400 RSI: 0000000000000246 RDI: > ffff99e91a831400 > [ 863.551092] RBP: ffffbda3c1fa3da0 R08: ffff99e9f20a5c00 R09: > 0000000000000029 > [ 863.551092] R10: 0000000000102da5 R11: 0000000000000000 R12: > 21e5544f6ba67674 > [ 863.551092] R13: ffff99e9efdf69c0 R14: ffffbda3c1fa3d48 R15: > ffff99e9ec019a00 > [ 863.551092] FS: 0000000000000000(0000) > GS:ffff99e9f2400000(0000) knlGS:0000000000000000 > [ 863.551092] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 863.551092] CR2: 00007fad6a304000 CR3: 00000002ab8b0004 CR4: > 00000000003606f0 > [ 863.551092] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > 0000000000000000 > [ 863.551092] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: > 0000000000000400 > [ 863.551092] Call Trace: > [ 863.551092] ? mempool_alloc_slab+0x19/0x20 > [ 863.551092] ? smb2_calc_size+0x72/0x160 [cifs] > [ 863.551092] cifs_handle_standard+0x170/0x190 [cifs] > [ 863.551092] smb3_receive_transform+0x2b0/0x740 [cifs] > [ 863.551092] cifs_demultiplex_thread+0x249/0xbc0 [cifs] > [ 863.551092] ? __switch_to_asm+0x34/0x70 > [ 863.551092] kthread+0x124/0x140 > [ 863.551092] ? cifs_handle_standard+0x190/0x190 [cifs] > [ 863.551092] ? __kthread_parkme+0x70/0x70 > [ 863.551092] ret_from_fork+0x35/0x40 > [ 863.551092] Modules linked in: binfmt_misc xt_owner > xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 > iptable_security bpfilter arc4 md4 cmac nls_utf8 cifs ccm fscache > nls_iso8859_1 sb_edac intel_rapl_perf hv_balloon input_leds joydev > serio_raw mac_hid sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core > iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables > x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov > async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 > raid0 multipath linear crct10dif_pclmul crc32_pclmul > ghash_clmulni_intel aesni_intel hid_generic aes_x86_64 hid_hyperv > hyperv_keyboard crypto_simd hv_netvsc hv_utils hv_storvsc hid > scsi_transport_fc cryptd hyperv_fb glue_helper psmouse i2c_piix4 > pata_acpi hv_vmbus floppy > [ 863.717962] ---[ end trace 0704863ed727667d ]--- > [ 863.722689] RIP: 0010:cifs_reconnect+0x2ff/0xc40 [cifs] > [ 863.728117] Code: b7 f7 c2 da f6 05 64 05 0b 00 01 74 05 0f 1f > 44 00 00 48 8b 7d a8 48 8b 07 49 89 c4 4c 39 f7 75 05 eb 2a 49 89 c4 > 48 8b 57 08 <48> 89 50 08 48 89 02 48 8b 47 48 48 89 3f 48 89 7f 08 e8 > aa 84 fa > [ 863.747129] RSP: 0018:ffffbda3c1fa3d38 EFLAGS: 00010297 > [ 863.751705] RAX: 21e5544f6ba67674 RBX: ffff99e9efdf6800 RCX: > 0000000000000000 > [ 863.757375] RDX: ffff99e91a831400 RSI: 0000000000000246 RDI: > ffff99e91a831400 > [ 863.764302] RBP: ffffbda3c1fa3da0 R08: ffff99e9f20a5c00 R09: > 0000000000000029 > [ 863.771351] R10: 0000000000102da5 R11: 0000000000000000 R12: > 21e5544f6ba67674 > [ 863.777115] R13: ffff99e9efdf69c0 R14: ffffbda3c1fa3d48 R15: > ffff99e9ec019a00 > [ 863.783435] FS: 0000000000000000(0000) > GS:ffff99e9f2400000(0000) knlGS:0000000000000000 > [ 863.791343] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 863.797087] CR2: 00007fad6a304000 CR3: 00000002ab8b0004 CR4: > 00000000003606f0 > [ 863.803622] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > 0000000000000000 > [ 863.809918] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: > 0000000000000400 > > Later, during shut down, we see the following: > > [ 7362.017756] BUG: unable to handle kernel NULL pointer > dereference at 0000000000000808 > [ 7362.029916] #PF error: [WRITE] > [ 7362.029916] PGD 0 P4D 0 > [ 7362.029916] Oops: 0002 [#2] SMP PTI > [ 7362.029916] CPU: 2 PID: 27282 Comm: umount Tainted: G D > 5.1.0-050100-generic #201905052130 > [ 7362.029916] Hardware name: Microsoft Corporation Virtual > Machine/Virtual Machine, BIOS 090007 06/02/2017 > [ 7362.053217] RIP: 0010:_raw_spin_lock_irqsave+0x22/0x40 > [ 7362.053217] Code: 64 ff 5d c3 0f 1f 40 00 0f 1f 44 00 00 55 48 > 89 e5 53 9c 58 0f 1f 44 00 00 48 89 c3 fa 66 0f 1f 44 00 00 31 c0 ba > 01 00 00 00 <f0> 0f b1 17 75 06 48 89 d8 5b 5d c3 89 c6 e8 7b 0c 6a ff > 66 90 eb > [ 7362.053217] RSP: 0000:ffff9bb28168bd20 EFLAGS: 00010046 > [ 7362.053217] RAX: 0000000000000000 RBX: 0000000000000286 RCX: > 0000000080400037 > [ 7362.053217] RDX: 0000000000000001 RSI: 0000000000000001 RDI: > 0000000000000808 > [ 7362.053217] RBP: ffff9bb28168bd28 R08: 0000000000000000 R09: > ffffffffc0723d00 > [ 7362.053217] R10: ffff889c7158d800 R11: 0000000000000001 R12: > ffffffffc07adb98 > [ 7362.053217] R13: 0000000000000000 R14: 0000000000000001 R15: > 0000000000000009 > [ 7362.053217] FS: 00007f973e272080(0000) > GS:ffff889c75c80000(0000) knlGS:0000000000000000 > [ 7362.053217] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 7362.125214] CR2: 0000000000000808 CR3: 000000028b40e004 CR4: > 00000000003606e0 > [ 7362.125214] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > 0000000000000000 > [ 7362.125214] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: > 0000000000000400 > [ 7362.125214] Call Trace: > [ 7362.125214] force_sig_info+0x2e/0xe0 > [ 7362.125214] force_sig+0x16/0x20 > [ 7362.125214] cifs_put_tcp_session+0xf5/0x120 [cifs] > [ 7362.125214] cifs_put_smb_ses+0x14f/0x4e0 [cifs] > [ 7362.161231] cifs_put_tcon.part.45+0xc1/0x1e0 [cifs] > [ 7362.161231] cifs_put_tlink+0x49/0x70 [cifs] > [ 7362.161231] cifs_umount+0x57/0xc0 [cifs] > [ 7362.161231] cifs_kill_sb+0x1e/0x30 [cifs] > [ 7362.177657] deactivate_locked_super+0x3a/0x80 > [ 7362.177657] deactivate_super+0x51/0x60 > [ 7362.177657] cleanup_mnt+0x3f/0x80 > [ 7362.177657] __cleanup_mnt+0x12/0x20 > [ 7362.177657] task_work_run+0x9d/0xc0 > [ 7362.177657] exit_to_usermode_loop+0xf2/0x100 > [ 7362.177657] do_syscall_64+0xda/0x110 > [ 7362.177657] entry_SYSCALL_64_after_hwframe+0x44/0xa9 > [ 7362.177657] RIP: 0033:0x7f973db398c7 > [ 7362.177657] Code: 95 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f > 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 > 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 95 2c 00 f7 d8 64 > 89 01 48 > [ 7362.177657] RSP: 002b:00007ffdf199a088 EFLAGS: 00000246 > ORIG_RAX: 00000000000000a6 > [ 7362.177657] RAX: 0000000000000000 RBX: 0000556bb9680a40 RCX: > 00007f973db398c7 > [ 7362.177657] RDX: 0000000000000001 RSI: 0000000000000000 RDI: > 0000556bb96819c0 > [ 7362.177657] RBP: 0000000000000000 R08: 0000556bb96812c0 R09: > 0000000000000004 > [ 7362.177657] R10: 000000000000000b R11: 0000000000000246 R12: > 0000556bb96819c0 > [ 7362.177657] R13: 00007f973e05b8a4 R14: 0000556bb9681b40 R15: > 0000556bb7f3d0e0 > [ 7362.177657] Modules linked in: binfmt_misc xt_owner > xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 > iptable_security bpfilter arc4 md4 cmac nls_utf8 cifs ccm fscache > nls_iso8859_1 sb_edac intel_rapl_perf input_leds serio_raw hv_balloon > joydev mac_hid sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core > iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables > x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov > async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 > raid0 multipath linear crct10dif_pclmul crc32_pclmul > ghash_clmulni_intel hid_generic aesni_intel hid_hyperv hv_netvsc > hv_utils hid hyperv_keyboard aes_x86_64 hv_storvsc crypto_simd > scsi_transport_fc cryptd glue_helperhyperv_fb psmouse i2c_piix4 > pata_acpi hv_vmbus floppy > [ 7362.317204] CR2: 0000000000000808 > [ 7362.317204] ---[ end trace 46b80f1e560d279a ]--- > [ 7362.317204] RIP: 0010:cifs_reconnect+0x2e1/0xc30 [cifs] > [ 7362.317204] Code: 35 df 14 f0 f6 05 02 f5 0a 00 01 74 05 0f 1f > 44 00 00 48 8b 7d a8 48 8b 07 49 89 c4 4c 39 f7 75 05 eb 2a 49 89 c4 > 48 8b 57 08 <48> 89 50 08 48 89 02 48 8b 47 48 48 89 3f 48 89 7f 08 e8 > 38 26 50 > [ 7362.317204] RSP: 0018:ffff9bb28176fd38 EFLAGS: 00010297 > [ 7362.317204] RAX: e2e73c7acd608da8 RBX: ffff889c72c7a000 RCX: > 0000000000000000 > [ 7362.317204] RDX: ffff889b90912700 RSI: 0000000000000246 RDI: > ffff889b90912700 > [ 7362.317204] RBP: ffff9bb28176fda0 R08: ffff889c74490000 R09: > 0000000000000090 > [ 7362.317204] R10: 0000000000385a61 R11: 0000000000000001 R12: > e2e73c7acd608da8 > [ 7362.317204] R13: ffff889c72c7a1c0 R14: ffff9bb28176fd48 R15: > ffff889c71031000 > [ 7362.317204] FS: 00007f973e272080(0000) > GS:ffff889c75c80000(0000) knlGS:0000000000000000 > [ 7362.317204] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 7362.317204] CR2: 0000000000000808 CR3: 000000028b40e004 CR4: > 00000000003606e0 > [ 7362.317204] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > 0000000000000000 > [ 7362.317204] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: > 0000000000000400 > > Mount configuration is as follows: > > $ mount | grep 'type cifs' > //[storage account name].file.core.windows.net/[share 1] on [home > 1]/data/base type cifs > (rw,relatime,vers=3.0,sec=ntlmsspi,cache=strict,username=[user > 1],uid=[uid 1],forceuid,gid=0,noforcegid,addr=[endpoint],file_mode=0755,dir_mode=0755,soft,persistenthandles,nounix,serverino,mapposix,rsize=1048576,wsize=1048576,bsize=1048576,echo_interval=60,actimeo=1) > //[storage account name].file.core.windows.net/[share 2] on [home > 2]/data/base type cifs > (rw,relatime,vers=3.0,sec=ntlmsspi,cache=strict,username=[user > 2],uid=[uid 2],forceuid,gid=0,noforcegid,addr=[endpoint],file_mode=0755,dir_mode=0755,soft,persistenthandles,nounix,serverino,mapposix,rsize=1048576,wsize=1048576,bsize=1048576,echo_interval=60,actimeo=1) > //[storage account name].file.core.windows.net/[share 3] on [home > 3]/data/base type cifs > (rw,relatime,vers=3.0,sec=ntlmsspi,cache=strict,username=[user > 3],uid=[uid 3],forceuid,gid=0,noforcegid,addr=[endpoint],file_mode=0755,dir_mode=0755,soft,persistenthandles,nounix,serverino,mapposix,rsize=1048576,wsize=1048576,bsize=1048576,echo_interval=60,actimeo=1) > //[storage account name].file.core.windows.net/[share 4] on [home > 4]/data/base type cifs > (rw,relatime,vers=3.0,sec=ntlmsspi,cache=strict,username=[user > 4],uid=[uid 4],forceuid,gid=0,noforcegid,addr=[endpoint],file_mode=0755,dir_mode=0755,soft,persistenthandles,nounix,serverino,mapposix,rsize=1048576,wsize=1048576,bsize=1048576,echo_interval=60,actimeo=1) > //[storage account name].file.core.windows.net/[share 5] on [home > 5]/data/base type cifs > (rw,relatime,vers=3.0,sec=ntlmsspi,cache=strict,username=[user > 5],uid=[uid 5],forceuid,gid=0,noforcegid,addr=[endpoint],file_mode=0755,dir_mode=0755,soft,persistenthandles,nounix,serverino,mapposix,rsize=1048576,wsize=1048576,bsize=1048576,echo_interval=60,actimeo=1) > > What limited debugging information I know to provide: > > $ cat /proc/fs/cifs/Stats > Resources in use > CIFS Session: 5 > Share (unique mount targets): 10 > SMB Request/Response Buffer: 5 Pool size: 9 > SMB Small Req/Resp Buffer: 48 Pool size: 30 > Operations (MIDs): 0 > > 42 session 84 share reconnects > Total vfs operations: 1836 maximum at one time: 10 > > 1) \\[storage account name].file.core.windows.net\[share 1] > SMBs: 259 > Bytes read: 506972 Bytes written: 0 > Open files: 0 total (local), 0 open on server > TreeConnects: 11 total 0 failed > TreeDisconnects: 0 total 0 failed > Creates: 77 total 0 failed > Closes: 69 total 0 failed > Flushes: 0 total 0 failed > Reads: 11 total 0 failed > Writes: 0 total 0 failed > Locks: 0 total 0 failed > IOCTLs: 11 total 1 failed > QueryDirectories: 0 total 0 failed > ChangeNotifies: 0 total 0 failed > QueryInfos: 81 total 0 failed > SetInfos: 0 total 0 failed > OplockBreaks: 0 sent 0 failed > 2) \\[storage account name].file.core.windows.net\[share 2] DISCONNECTED > SMBs: 2372 > Bytes read: 24424415 Bytes written: 0 > Open files: 0 total (local), 0 open on server > TreeConnects: 25 total 0 failed > TreeDisconnects: 0 total 0 failed > Creates: 731 total 0 failed > Closes: 709 total 0 failed > Flushes: 0 total 0 failed > Reads: 148 total 0 failed > Writes: 0 total 0 failed > Locks: 0 total 0 failed > IOCTLs: 25 total 1 failed > QueryDirectories: 0 total 0 failed > ChangeNotifies: 0 total 0 failed > QueryInfos: 735 total 0 failed > SetInfos: 0 total 0 failed > OplockBreaks: 0 sent 0 failed > 3) \\[storage account name].file.core.windows.net\[share 3] > SMBs: 20 > Bytes read: 0 Bytes written: 0 > Open files: 0 total (local), 0 open on server > TreeConnects: 3 total 0 failed > TreeDisconnects: 0 total 0 failed > Creates: 4 total 0 failed > Closes: 3 total 0 failed > Flushes: 0 total 0 failed > Reads: 0 total 0 failed > Writes: 0 total 0 failed > Locks: 0 total 0 failed > IOCTLs: 3 total 1 failed > QueryDirectories: 0 total 0 failed > ChangeNotifies: 0 total 0 failed > QueryInfos: 8 total 0 failed > SetInfos: 0 total 0 failed > OplockBreaks: 0 sent 0 failed > 4) \\[storage account name].file.core.windows.net\[share 4] > SMBs: 1018 > Bytes read: 2225080 Bytes written: 0 > Open files: 0 total (local), 0 open on server > TreeConnects: 11 total 0 failed > TreeDisconnects: 0 total 0 failed > Creates: 310 total 0 failed > Closes: 303 total 0 failed > Flushes: 0 total 0 failed > Reads: 69 total 0 failed > Writes: 0 total 0 failed > Locks: 0 total 0 failed > IOCTLs: 11 total 1 failed > QueryDirectories: 0 total 0 failed > ChangeNotifies: 0 total 0 failed > QueryInfos: 314 total 0 failed > SetInfos: 0 total 0 failed > OplockBreaks: 1 sent 0 failed > 5) \\[storage account name].file.core.windows.net\[share 5] > SMBs: 12 > Bytes read: 0 Bytes written: 0 > Open files: 0 total (local), 0 open on server > TreeConnects: 1 total 0 failed > TreeDisconnects: 0 total 0 failed > Creates: 2 total 0 failed > Closes: 1 total 0 failed > Flushes: 0 total 0 failed > Reads: 0 total 0 failed > Writes: 0 total 0 failed > Locks: 0 total 0 failed > IOCTLs: 2 total 1 failed > QueryDirectories: 0 total 0 failed > ChangeNotifies: 0 total 0 failed > QueryInfos: 6 total 0 failed > SetInfos: 0 total 0 failed > OplockBreaks: 0 sent 0 failed > > $ cat /proc/fs/cifs/DebugData > Display Internal CIFS Data Structures for Debugging > --------------------------------------------------- > CIFS Version 2.20 > Features: DFS,FSCACHE,STATS,DEBUG,ALLOW_INSECURE_LEGACY,WEAK_PW_HASH,CIFS_POSIX,UPCALL(SPNEGO),XATTR,ACL > CIFSMaxBufSize: 16384 > Active VFS Requests: 1 > Servers: > Number of credits: 188 Dialect 0x300 signed > 1) Name: [endpoint] Uses: 1 Capability: 0x300077 Session > Status: 1 TCP status: 1 Instance: 10 > Local Users To Server: 1 SecMode: 0x3 Req On Wire: 0 > SessionId: 0x83e20c012c000701 encrypted signed > Shares: > 0) IPC: \\[storage account name].file.core.windows.net\IPC$ > Mounts: 1 DevInfo: 0x0 Attributes: 0x0 > PathComponentMax: 0 Status: 1 type: 0 Serial Number: 0x0 Encrypted > Share Capabilities: CONTINUOUS AVAILABILITY, Share Flags: 0x30 > tid: 0x5 Maximal Access: 0x12019f > > 1) \\[storage account name].file.core.windows.net\[share 1] > Mounts: 1 DevInfo: 0x20 Attributes: 0xe > PathComponentMax: 255 Status: 1 type: DISK Serial Number: > 0x83265083 Encrypted > Share Capabilities: CONTINUOUS AVAILABILITY, Aligned, > Partition Aligned, Share Flags: 0x0 > tid: 0x1 Optimal sector size: 0x200 Maximal Access: 0x11f01ff > > MIDs: > > Number of credits: 509 Dialect 0x300 signed > 2) Name: [endpoint] Uses: 1 Capability: 0x300077 Session > Status: 1 TCP status: 3 Instance: 24 > Local Users To Server: 1 SecMode: 0x3 Req On Wire: 2 > SessionId: 0x84d10c0164000069 encrypted signed > Shares: > 0) IPC: \\[storage account name].file.core.windows.net\IPC$ > Mounts: 1 DevInfo: 0x0 Attributes: 0x0 > PathComponentMax: 0 Status: 1 type: 0 Serial Number: 0x0 Encrypted > Share Capabilities: CONTINUOUS AVAILABILITY, Share Flags: 0x30 > tid: 0x5 Maximal Access: 0x12019f DISCONNECTED > > 1) \\[storage account name].file.core.windows.net\[share 2] > Mounts: 1 DevInfo: 0x20 Attributes: 0xe > PathComponentMax: 255 Status: 1 type: DISK Serial Number: > 0x412c087a Encrypted > Share Capabilities: CONTINUOUS AVAILABILITY, Aligned, > Partition Aligned, Share Flags: 0x0 > tid: 0x1 Optimal sector size: 0x200 Maximal Access: > 0x11f01ff DISCONNECTED > > MIDs: > > Number of credits: 124 Dialect 0x300 signed > 3) Name: [endpoint] Uses: 1 Capability: 0x300077 Session > Status: 1 TCP status: 1 Instance: 2 > Local Users To Server: 1 SecMode: 0x3 Req On Wire: 0 > SessionId: 0x8291000264000049 encrypted signed > Shares: > 0) IPC: \\[storage account name].file.core.windows.net\IPC$ > Mounts: 1 DevInfo: 0x0 Attributes: 0x0 > PathComponentMax: 0 Status: 1 type: 0 Serial Number: 0x0 Encrypted > Share Capabilities: CONTINUOUS AVAILABILITY, Share Flags: 0x30 > tid: 0x5 Maximal Access: 0x12019f > > 1) \\[storage account name].file.core.windows.net\[share 3] > Mounts: 1 DevInfo: 0x20 Attributes: 0xe > PathComponentMax: 255 Status: 1 type: DISK Serial Number: > 0x5b29f8e4 Encrypted > Share Capabilities: CONTINUOUS AVAILABILITY, Aligned, > Partition Aligned, Share Flags: 0x0 > tid: 0x1 Optimal sector size: 0x200 Maximal Access: 0x11f01ff > > MIDs: > > Number of credits: 298 Dialect 0x300 signed > 4) Name: [endpoint] Uses: 1 Capability: 0x300077 Session > Status: 1 TCP status: 1 Instance: 10 > Local Users To Server: 1 SecMode: 0x3 Req On Wire: 0 > SessionId: 0x8161000088000045 encrypted signed > Shares: > 0) IPC: \\[storage account name].file.core.windows.net\IPC$ > Mounts: 1 DevInfo: 0x0 Attributes: 0x0 > PathComponentMax: 0 Status: 1 type: 0 Serial Number: 0x0 Encrypted > Share Capabilities: CONTINUOUS AVAILABILITY, Share Flags: 0x30 > tid: 0x5 Maximal Access: 0x12019f > > 1) \\[storage account name].file.core.windows.net\[share 4] > Mounts: 1 DevInfo: 0x20 Attributes: 0xe > PathComponentMax: 255 Status: 1 type: DISK Serial Number: > 0x832fa96c Encrypted > Share Capabilities: CONTINUOUS AVAILABILITY, Aligned, > Partition Aligned, Share Flags: 0x0 > tid: 0x1 Optimal sector size: 0x200 Maximal Access: 0x11f01ff > > MIDs: > > Number of credits: 185 Dialect 0x300 signed > 5) Name: [endpoint] Uses: 1 Capability: 0x300077 Session > Status: 1 TCP status: 1 Instance: 1 > Local Users To Server: 1 SecMode: 0x3 Req On Wire: 0 > SessionId: 0x809100009c00001d encrypted signed > Shares: > 0) IPC: \\[storage account name].file.core.windows.net\IPC$ > Mounts: 1 DevInfo: 0x0 Attributes: 0x0 > PathComponentMax: 0 Status: 1 type: 0 Serial Number: 0x0 Encrypted > Share Capabilities: CONTINUOUS AVAILABILITY, Share Flags: 0x30 > tid: 0x1 Maximal Access: 0x12019f > > 1) \\[storage account name].file.core.windows.net\[share 5] > Mounts: 1 DevInfo: 0x20 Attributes: 0xe > PathComponentMax: 255 Status: 1 type: DISK Serial Number: > 0xab3138f8 Encrypted > Share Capabilities: CONTINUOUS AVAILABILITY, Aligned, > Partition Aligned, Share Flags: 0x0 > tid: 0x5 Optimal sector size: 0x200 Maximal Access: 0x11f01ff > > MIDs: > > Is there any other information I can provide to aid in troubleshooting? > > Regards, > Luke Hi Luke, Thanks for reporting the issue. There was a bunch of code changes that went to the cifs module recently that may be a reason for memory problems you are reporting. Did you try your workload on any older kernels (e.g. 4.19, 4.20 or 5.0) ? If yes, please provide kernel versions to help narrowing down the problem. -- Best regards, Pavel Shilovsky
