Return-Path: Received: from mail-wr0-f181.google.com ([209.85.128.181]:34722 "EHLO mail-wr0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750773AbdEBRW2 (ORCPT ); Tue, 2 May 2017 13:22:28 -0400 Date: Tue, 2 May 2017 19:22:22 +0200 From: Corentin Labbe To: Jan Kara Cc: anna.schumaker@netapp.com, hch@lst.de, trond.myklebust@primarydata.com, axboe@fb.com, linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [BUG] cannot mount nfs, bisected to 0db10944a76ba ("nfs: Convert to separately allocated bdi") Message-ID: <20170502172222.GA28711@Red> References: <20170428095624.GA22965@Red> <20170502162704.GM13916@quack2.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20170502162704.GM13916@quack2.suse.cz> Sender: linux-nfs-owner@vger.kernel.org List-ID: On Tue, May 02, 2017 at 06:27:04PM +0200, Jan Kara wrote: > Hello, > > On Fri 28-04-17 11:56:24, Corentin Labbe wrote: > > Since linux next-20170421, mounting nfs give me: > > [ 774.994934] ------------[ cut here ]------------ > > [ 774.994975] WARNING: CPU: 1 PID: 10284 at /linux-next/fs/sysfs/dir.c:31 sysfs_warn_dup+0x64/0x74 > > [ 774.994985] sysfs: cannot create duplicate filename '/devices/virtual/bdi/0:32' > > [ 774.994992] Modules linked in: axp20x_usb_power gpio_axp209 nvmem_sunxi_sid sun4i_dma sun4i_ss virt_dma > > [ 774.995047] CPU: 1 PID: 10284 Comm: mount.nfs Not tainted 4.11.0-rc4+ #14 > > [ 774.995054] Hardware name: Allwinner sun7i (A20) Family > > [ 774.995085] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) > > [ 774.995104] [] (show_stack) from [] (dump_stack+0x78/0x8c) > > [ 774.995121] [] (dump_stack) from [] (__warn+0xe8/0x100) > > [ 774.995135] [] (__warn) from [] (warn_slowpath_fmt+0x38/0x48) > > [ 774.995150] [] (warn_slowpath_fmt) from [] (sysfs_warn_dup+0x64/0x74) > > [ 774.995167] [] (sysfs_warn_dup) from [] (sysfs_create_dir_ns+0x84/0x94) > > [ 774.995184] [] (sysfs_create_dir_ns) from [] (kobject_add_internal+0x9c/0x2ec) > > [ 774.995199] [] (kobject_add_internal) from [] (kobject_add+0x48/0x98) > > [ 774.995217] [] (kobject_add) from [] (device_add+0xe4/0x5a0) > > [ 774.995232] [] (device_add) from [] (device_create_groups_vargs+0xac/0xbc) > > [ 774.995247] [] (device_create_groups_vargs) from [] (device_create_vargs+0x20/0x28) > > [ 774.995263] [] (device_create_vargs) from [] (bdi_register_va+0x44/0xfc) > > [ 774.995280] [] (bdi_register_va) from [] (super_setup_bdi_name+0x48/0xa4) > > [ 774.995299] [] (super_setup_bdi_name) from [] (nfs_fill_super+0x1a4/0x204) > > [ 774.995315] [] (nfs_fill_super) from [] (nfs_fs_mount_common+0x140/0x1e8) > > [ 774.995333] [] (nfs_fs_mount_common) from [] (nfs4_remote_mount+0x50/0x58) > > [ 774.995349] [] (nfs4_remote_mount) from [] (mount_fs+0x14/0xa4) > > [ 774.995368] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) > > [ 774.995385] [] (vfs_kern_mount) from [] (nfs_do_root_mount+0x80/0xa0) > > [ 774.995400] [] (nfs_do_root_mount) from [] (nfs4_try_mount+0x28/0x3c) > > [ 774.995415] [] (nfs4_try_mount) from [] (nfs_fs_mount+0x2cc/0x8c4) > > [ 774.995430] [] (nfs_fs_mount) from [] (mount_fs+0x14/0xa4) > > [ 774.995445] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) > > [ 774.995461] [] (vfs_kern_mount) from [] (do_mount+0x158/0xc7c) > > [ 774.995475] [] (do_mount) from [] (SyS_mount+0x8c/0xb4) > > [ 774.995491] [] (SyS_mount) from [] (ret_fast_syscall+0x0/0x3c) > > [ 774.995501] ---[ end trace 0665e451f8864ff0 ]--- > ... > > The mount command is > > mount -t nfs -o tcp,hard,intr,async,rsize=4096,wsize=4096 192.168.1.100:/mnt/local_kernel /usr/src/ > > > > the mount command failling with: "mount.nfs: Cannot allocate memory" > > I've tried reproducing this (both with NFSv3 and NFSv4) and failed. Also I > have looked through the code and I fail to see how this could happen. Is > this the only NFS mount that you have on your system? Didn't also the > WARN_ON in super_setup_bdi_name() trigger? > > Can you run with the attached debug patch and post full dmesg after the > failure? > Hello I forgot to said that I have 6 nfs mount point. mount -t nfs -o ro,tcp,hard,intr,async,vers=3 192.168.1.100:/usr/portage /usr/portage/ mount -t nfs -o tcp,hard,intr,async,vers=3 192.168.1.100:/usr/local/portage /usr/local/portage/ mount -t nfs -o tcp,hard,intr,async,vers=3 192.168.1.100:/mnt/tempo/portages/distfiles /usr/portage/distfiles mount -t nfs -o tcp,hard,intr,async,vers=4 192.168.1.100:/mnt/tempo/portages/cubiedev/packages /usr/portage/packages mount -t nfs -o tcp,hard,intr,async,vers=4,rsize=4096,wsize=4096 192.168.1.100:/var/tmp/portage/cubie /var/tmp/portage/ mount -t nfs -o tcp,hard,intr,async,rsize=4096,wsize=4096 192.168.1.100:/mnt/tempo/cubie/local_kernel /usr/src/ It's always the last which fail, but strangely inverting the two last made everything ok. [ 63.424216] Registering bdi 0:29 for server edcdcc00 [ 63.424245] CPU: 1 PID: 2409 Comm: mount.nfs Not tainted 4.11.0-next-20170502+ #100 [ 63.424253] Hardware name: Allwinner sun7i (A20) Family [ 63.424285] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 63.424304] [] (show_stack) from [] (dump_stack+0x78/0x8c) [ 63.424323] [] (dump_stack) from [] (nfs_fill_super+0x1a8/0x224) [ 63.424339] [] (nfs_fill_super) from [] (nfs_fs_mount_common+0x140/0x1e8) [ 63.424354] [] (nfs_fs_mount_common) from [] (nfs_try_mount+0x110/0x268) [ 63.424369] [] (nfs_try_mount) from [] (nfs_fs_mount+0x2e0/0x8ec) [ 63.424387] [] (nfs_fs_mount) from [] (mount_fs+0x14/0xa4) [ 63.424403] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) [ 63.424418] [] (vfs_kern_mount) from [] (do_mount+0x158/0xc7c) [ 63.424432] [] (do_mount) from [] (SyS_mount+0x8c/0xb4) [ 63.424448] [] (SyS_mount) from [] (ret_fast_syscall+0x0/0x3c) [ 63.474416] Registering bdi 0:30 for server ee40b800 [ 63.474442] CPU: 1 PID: 2413 Comm: mount.nfs Not tainted 4.11.0-next-20170502+ #100 [ 63.474450] Hardware name: Allwinner sun7i (A20) Family [ 63.474488] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 63.474507] [] (show_stack) from [] (dump_stack+0x78/0x8c) [ 63.474527] [] (dump_stack) from [] (nfs_fill_super+0x1a8/0x224) [ 63.474544] [] (nfs_fill_super) from [] (nfs_fs_mount_common+0x140/0x1e8) [ 63.474559] [] (nfs_fs_mount_common) from [] (nfs_try_mount+0x110/0x268) [ 63.474574] [] (nfs_try_mount) from [] (nfs_fs_mount+0x2e0/0x8ec) [ 63.474591] [] (nfs_fs_mount) from [] (mount_fs+0x14/0xa4) [ 63.474609] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) [ 63.474625] [] (vfs_kern_mount) from [] (do_mount+0x158/0xc7c) [ 63.474640] [] (do_mount) from [] (SyS_mount+0x8c/0xb4) [ 63.474656] [] (SyS_mount) from [] (ret_fast_syscall+0x0/0x3c) [ 63.532851] Registering bdi 0:31 for server edd48c00 [ 63.532877] CPU: 1 PID: 2416 Comm: mount.nfs Not tainted 4.11.0-next-20170502+ #100 [ 63.532885] Hardware name: Allwinner sun7i (A20) Family [ 63.532924] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 63.532946] [] (show_stack) from [] (dump_stack+0x78/0x8c) [ 63.532967] [] (dump_stack) from [] (nfs_fill_super+0x1a8/0x224) [ 63.532984] [] (nfs_fill_super) from [] (nfs_fs_mount_common+0x140/0x1e8) [ 63.532999] [] (nfs_fs_mount_common) from [] (nfs_try_mount+0x110/0x268) [ 63.533014] [] (nfs_try_mount) from [] (nfs_fs_mount+0x2e0/0x8ec) [ 63.533032] [] (nfs_fs_mount) from [] (mount_fs+0x14/0xa4) [ 63.533049] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) [ 63.533064] [] (vfs_kern_mount) from [] (do_mount+0x158/0xc7c) [ 63.533079] [] (do_mount) from [] (SyS_mount+0x8c/0xb4) [ 63.533096] [] (SyS_mount) from [] (ret_fast_syscall+0x0/0x3c) [ 63.607887] Registering bdi 0:32 for server edc7c400 [ 63.607914] CPU: 1 PID: 2419 Comm: mount.nfs Not tainted 4.11.0-next-20170502+ #100 [ 63.607923] Hardware name: Allwinner sun7i (A20) Family [ 63.607955] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 63.607975] [] (show_stack) from [] (dump_stack+0x78/0x8c) [ 63.607995] [] (dump_stack) from [] (nfs_fill_super+0x1a8/0x224) [ 63.608012] [] (nfs_fill_super) from [] (nfs_fs_mount_common+0x140/0x1e8) [ 63.608028] [] (nfs_fs_mount_common) from [] (nfs4_remote_mount+0x50/0x58) [ 63.608044] [] (nfs4_remote_mount) from [] (mount_fs+0x14/0xa4) [ 63.608060] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) [ 63.608077] [] (vfs_kern_mount) from [] (nfs_do_root_mount+0x80/0xa0) [ 63.608092] [] (nfs_do_root_mount) from [] (nfs4_try_mount+0x28/0x3c) [ 63.608105] [] (nfs4_try_mount) from [] (nfs_fs_mount+0x2e0/0x8ec) [ 63.608121] [] (nfs_fs_mount) from [] (mount_fs+0x14/0xa4) [ 63.608135] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) [ 63.608150] [] (vfs_kern_mount) from [] (do_mount+0x158/0xc7c) [ 63.608164] [] (do_mount) from [] (SyS_mount+0x8c/0xb4) [ 63.608181] [] (SyS_mount) from [] (ret_fast_syscall+0x0/0x3c) [ 63.711978] Unregistering bdi 0:32 [ 63.712008] CPU: 1 PID: 2419 Comm: mount.nfs Not tainted 4.11.0-next-20170502+ #100 [ 63.712016] Hardware name: Allwinner sun7i (A20) Family [ 63.712054] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 63.712072] [] (show_stack) from [] (dump_stack+0x78/0x8c) [ 63.712091] [] (dump_stack) from [] (bdi_unregister+0x34/0x18c) [ 63.712107] [] (bdi_unregister) from [] (bdi_put+0xf4/0x13c) [ 63.712124] [] (bdi_put) from [] (generic_shutdown_super+0xdc/0xf8) [ 63.712143] [] (generic_shutdown_super) from [] (nfs_kill_super+0x14/0x30) [ 63.712160] [] (nfs_kill_super) from [] (deactivate_locked_super+0x58/0x7c) [ 63.712176] [] (deactivate_locked_super) from [] (cleanup_mnt+0x38/0x7c) [ 63.712192] [] (cleanup_mnt) from [] (task_work_run+0xc4/0xf8) [ 63.712209] [] (task_work_run) from [] (do_work_pending+0x7c/0xa4) [ 63.712225] [] (do_work_pending) from [] (slow_work_pending+0xc/0x20) [ 63.795383] Registering bdi 0:32 for server edd49800 [ 63.795409] CPU: 1 PID: 2419 Comm: mount.nfs Not tainted 4.11.0-next-20170502+ #100 [ 63.795417] Hardware name: Allwinner sun7i (A20) Family [ 63.795455] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 63.795475] [] (show_stack) from [] (dump_stack+0x78/0x8c) [ 63.795496] [] (dump_stack) from [] (nfs_fill_super+0x1a8/0x224) [ 63.795513] [] (nfs_fill_super) from [] (nfs_fs_mount_common+0x140/0x1e8) [ 63.795528] [] (nfs_fs_mount_common) from [] (nfs_try_mount+0x110/0x268) [ 63.795543] [] (nfs_try_mount) from [] (nfs_fs_mount+0x2e0/0x8ec) [ 63.795561] [] (nfs_fs_mount) from [] (mount_fs+0x14/0xa4) [ 63.795578] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) [ 63.795594] [] (vfs_kern_mount) from [] (do_mount+0x158/0xc7c) [ 63.795609] [] (do_mount) from [] (SyS_mount+0x8c/0xb4) [ 63.795626] [] (SyS_mount) from [] (ret_fast_syscall+0x0/0x3c) [ 63.862429] Registering bdi 0:33 for server edd4a400 [ 63.862455] CPU: 1 PID: 2429 Comm: mount.nfs Not tainted 4.11.0-next-20170502+ #100 [ 63.862463] Hardware name: Allwinner sun7i (A20) Family [ 63.862502] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 63.862521] [] (show_stack) from [] (dump_stack+0x78/0x8c) [ 63.862541] [] (dump_stack) from [] (nfs_fill_super+0x1a8/0x224) [ 63.862560] [] (nfs_fill_super) from [] (nfs_fs_mount_common+0x140/0x1e8) [ 63.862575] [] (nfs_fs_mount_common) from [] (nfs4_remote_mount+0x50/0x58) [ 63.862593] [] (nfs4_remote_mount) from [] (mount_fs+0x14/0xa4) [ 63.862611] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) [ 63.862628] [] (vfs_kern_mount) from [] (nfs_do_root_mount+0x80/0xa0) [ 63.862643] [] (nfs_do_root_mount) from [] (nfs4_try_mount+0x28/0x3c) [ 63.862657] [] (nfs4_try_mount) from [] (nfs_fs_mount+0x2e0/0x8ec) [ 63.862672] [] (nfs_fs_mount) from [] (mount_fs+0x14/0xa4) [ 63.862686] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) [ 63.862701] [] (vfs_kern_mount) from [] (do_mount+0x158/0xc7c) [ 63.862716] [] (do_mount) from [] (SyS_mount+0x8c/0xb4) [ 63.862732] [] (SyS_mount) from [] (ret_fast_syscall+0x0/0x3c) [ 64.094628] Registering bdi 0:33 for server edc87800 [ 64.094655] CPU: 1 PID: 2437 Comm: mount.nfs Not tainted 4.11.0-next-20170502+ #100 [ 64.094663] Hardware name: Allwinner sun7i (A20) Family [ 64.094702] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 64.094722] [] (show_stack) from [] (dump_stack+0x78/0x8c) [ 64.094742] [] (dump_stack) from [] (nfs_fill_super+0x1a8/0x224) [ 64.094760] [] (nfs_fill_super) from [] (nfs_fs_mount_common+0x140/0x1e8) [ 64.094777] [] (nfs_fs_mount_common) from [] (nfs4_remote_mount+0x50/0x58) [ 64.094794] [] (nfs4_remote_mount) from [] (mount_fs+0x14/0xa4) [ 64.094812] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) [ 64.094829] [] (vfs_kern_mount) from [] (nfs_do_root_mount+0x80/0xa0) [ 64.094844] [] (nfs_do_root_mount) from [] (nfs4_try_mount+0x28/0x3c) [ 64.094858] [] (nfs4_try_mount) from [] (nfs_fs_mount+0x2e0/0x8ec) [ 64.094873] [] (nfs_fs_mount) from [] (mount_fs+0x14/0xa4) [ 64.094888] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) [ 64.094902] [] (vfs_kern_mount) from [] (do_mount+0x158/0xc7c) [ 64.094917] [] (do_mount) from [] (SyS_mount+0x8c/0xb4) [ 64.094934] [] (SyS_mount) from [] (ret_fast_syscall+0x0/0x3c) [ 64.095053] ------------[ cut here ]------------ [ 64.095072] WARNING: CPU: 1 PID: 2437 at /mnt/linux-next/fs/sysfs/dir.c:31 sysfs_warn_dup+0x64/0x74 [ 64.095081] sysfs: cannot create duplicate filename '/devices/virtual/bdi/0:33' [ 64.095088] Modules linked in: axp20x_usb_power axp20x_ac_power axp20x_adc gpio_axp209 nvmem_sunxi_sid sun4i_dma sun4i_ss virt_dma [ 64.095154] CPU: 1 PID: 2437 Comm: mount.nfs Not tainted 4.11.0-next-20170502+ #100 [ 64.095162] Hardware name: Allwinner sun7i (A20) Family [ 64.095179] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 64.095194] [] (show_stack) from [] (dump_stack+0x78/0x8c) [ 64.095210] [] (dump_stack) from [] (__warn+0xe8/0x100) [ 64.095224] [] (__warn) from [] (warn_slowpath_fmt+0x38/0x48) [ 64.095240] [] (warn_slowpath_fmt) from [] (sysfs_warn_dup+0x64/0x74) [ 64.095256] [] (sysfs_warn_dup) from [] (sysfs_create_dir_ns+0x84/0x94) [ 64.095273] [] (sysfs_create_dir_ns) from [] (kobject_add_internal+0x9c/0x2ec) [ 64.095290] [] (kobject_add_internal) from [] (kobject_add+0x48/0x98) [ 64.095309] [] (kobject_add) from [] (device_add+0xe4/0x5a0) [ 64.095326] [] (device_add) from [] (device_create_groups_vargs+0xac/0xbc) [ 64.095341] [] (device_create_groups_vargs) from [] (device_create_vargs+0x20/0x28) [ 64.095358] [] (device_create_vargs) from [] (bdi_register_va+0x44/0xfc) [ 64.095375] [] (bdi_register_va) from [] (super_setup_bdi_name+0x44/0xa0) [ 64.095393] [] (super_setup_bdi_name) from [] (nfs_fill_super+0x1c4/0x224) [ 64.095409] [] (nfs_fill_super) from [] (nfs_fs_mount_common+0x140/0x1e8) [ 64.095423] [] (nfs_fs_mount_common) from [] (nfs4_remote_mount+0x50/0x58) [ 64.095437] [] (nfs4_remote_mount) from [] (mount_fs+0x14/0xa4) [ 64.095451] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) [ 64.095467] [] (vfs_kern_mount) from [] (nfs_do_root_mount+0x80/0xa0) [ 64.095482] [] (nfs_do_root_mount) from [] (nfs4_try_mount+0x28/0x3c) [ 64.095496] [] (nfs4_try_mount) from [] (nfs_fs_mount+0x2e0/0x8ec) [ 64.095511] [] (nfs_fs_mount) from [] (mount_fs+0x14/0xa4) [ 64.095525] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) [ 64.095538] [] (vfs_kern_mount) from [] (do_mount+0x158/0xc7c) [ 64.095553] [] (do_mount) from [] (SyS_mount+0x8c/0xb4) [ 64.095568] [] (SyS_mount) from [] (ret_fast_syscall+0x0/0x3c) [ 64.095577] ---[ end trace 5cd276530ddd30a7 ]--- [ 64.095588] ------------[ cut here ]------------ [ 64.095603] WARNING: CPU: 1 PID: 2437 at /mnt/linux-next/lib/kobject.c:240 kobject_add_internal+0x274/0x2ec [ 64.095612] kobject_add_internal failed for 0:33 with -EEXIST, don't try to register things with the same name in the same directory. [ 64.095618] Modules linked in: axp20x_usb_power axp20x_ac_power axp20x_adc gpio_axp209 nvmem_sunxi_sid sun4i_dma sun4i_ss virt_dma [ 64.095679] CPU: 1 PID: 2437 Comm: mount.nfs Tainted: G W 4.11.0-next-20170502+ #100 [ 64.095687] Hardware name: Allwinner sun7i (A20) Family [ 64.095702] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 64.095716] [] (show_stack) from [] (dump_stack+0x78/0x8c) [ 64.095730] [] (dump_stack) from [] (__warn+0xe8/0x100) [ 64.095743] [] (__warn) from [] (warn_slowpath_fmt+0x38/0x48) [ 64.095758] [] (warn_slowpath_fmt) from [] (kobject_add_internal+0x274/0x2ec) [ 64.095775] [] (kobject_add_internal) from [] (kobject_add+0x48/0x98) [ 64.095790] [] (kobject_add) from [] (device_add+0xe4/0x5a0) [ 64.095806] [] (device_add) from [] (device_create_groups_vargs+0xac/0xbc) [ 64.095821] [] (device_create_groups_vargs) from [] (device_create_vargs+0x20/0x28) [ 64.095836] [] (device_create_vargs) from [] (bdi_register_va+0x44/0xfc) [ 64.095851] [] (bdi_register_va) from [] (super_setup_bdi_name+0x44/0xa0) [ 64.095868] [] (super_setup_bdi_name) from [] (nfs_fill_super+0x1c4/0x224) [ 64.095883] [] (nfs_fill_super) from [] (nfs_fs_mount_common+0x140/0x1e8) [ 64.095897] [] (nfs_fs_mount_common) from [] (nfs4_remote_mount+0x50/0x58) [ 64.095911] [] (nfs4_remote_mount) from [] (mount_fs+0x14/0xa4) [ 64.095926] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) [ 64.095940] [] (vfs_kern_mount) from [] (nfs_do_root_mount+0x80/0xa0) [ 64.095955] [] (nfs_do_root_mount) from [] (nfs4_try_mount+0x28/0x3c) [ 64.095969] [] (nfs4_try_mount) from [] (nfs_fs_mount+0x2e0/0x8ec) [ 64.095984] [] (nfs_fs_mount) from [] (mount_fs+0x14/0xa4) [ 64.095999] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) [ 64.096012] [] (vfs_kern_mount) from [] (do_mount+0x158/0xc7c) [ 64.096026] [] (do_mount) from [] (SyS_mount+0x8c/0xb4) [ 64.096041] [] (SyS_mount) from [] (ret_fast_syscall+0x0/0x3c) [ 64.096049] ---[ end trace 5cd276530ddd30a8 ]---