Return-Path: Received: from mail-wm0-f46.google.com ([74.125.82.46]:36446 "EHLO mail-wm0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753321AbdD1J4b (ORCPT ); Fri, 28 Apr 2017 05:56:31 -0400 Date: Fri, 28 Apr 2017 11:56:24 +0200 From: Corentin Labbe To: jack@suse.cz, anna.schumaker@netapp.com, hch@lst.de, trond.myklebust@primarydata.com, axboe@fb.com Cc: linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [BUG] cannot mount nfs, bisected to 0db10944a76ba ("nfs: Convert to separately allocated bdi") Message-ID: <20170428095624.GA22965@Red> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-nfs-owner@vger.kernel.org List-ID: Hello 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 ]--- [ 774.995512] ------------[ cut here ]------------ [ 774.995526] WARNING: CPU: 1 PID: 10284 at /linux-next/lib/kobject.c:240 kobject_add_internal+0x274/0x2ec [ 774.995535] kobject_add_internal failed for 0:32 with -EEXIST, don't try to register things with the same name in the same directory. [ 774.995541] Modules linked in: axp20x_usb_power gpio_axp209 nvmem_sunxi_sid sun4i_dma sun4i_ss virt_dma [ 774.995590] CPU: 1 PID: 10284 Comm: mount.nfs Tainted: G W 4.11.0-rc4+ #14 [ 774.995597] Hardware name: Allwinner sun7i (A20) Family [ 774.995612] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 774.995626] [] (show_stack) from [] (dump_stack+0x78/0x8c) [ 774.995640] [] (dump_stack) from [] (__warn+0xe8/0x100) [ 774.995653] [] (__warn) from [] (warn_slowpath_fmt+0x38/0x48) [ 774.995668] [] (warn_slowpath_fmt) from [] (kobject_add_internal+0x274/0x2ec) [ 774.995683] [] (kobject_add_internal) from [] (kobject_add+0x48/0x98) [ 774.995698] [] (kobject_add) from [] (device_add+0xe4/0x5a0) [ 774.995712] [] (device_add) from [] (device_create_groups_vargs+0xac/0xbc) [ 774.995727] [] (device_create_groups_vargs) from [] (device_create_vargs+0x20/0x28) [ 774.995740] [] (device_create_vargs) from [] (bdi_register_va+0x44/0xfc) [ 774.995755] [] (bdi_register_va) from [] (super_setup_bdi_name+0x48/0xa4) [ 774.995771] [] (super_setup_bdi_name) from [] (nfs_fill_super+0x1a4/0x204) [ 774.995785] [] (nfs_fill_super) from [] (nfs_fs_mount_common+0x140/0x1e8) [ 774.995800] [] (nfs_fs_mount_common) from [] (nfs4_remote_mount+0x50/0x58) [ 774.995816] [] (nfs4_remote_mount) from [] (mount_fs+0x14/0xa4) [ 774.995831] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) [ 774.995847] [] (vfs_kern_mount) from [] (nfs_do_root_mount+0x80/0xa0) [ 774.995862] [] (nfs_do_root_mount) from [] (nfs4_try_mount+0x28/0x3c) [ 774.995877] [] (nfs4_try_mount) from [] (nfs_fs_mount+0x2cc/0x8c4) [ 774.995891] [] (nfs_fs_mount) from [] (mount_fs+0x14/0xa4) [ 774.995907] [] (mount_fs) from [] (vfs_kern_mount+0x54/0x128) [ 774.995921] [] (vfs_kern_mount) from [] (do_mount+0x158/0xc7c) [ 774.995935] [] (do_mount) from [] (SyS_mount+0x8c/0xb4) [ 774.995949] [] (SyS_mount) from [] (ret_fast_syscall+0x0/0x3c) [ 774.995958] ---[ end trace 0665e451f8864ff1 ]--- 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" Regards