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Date: Thu, 09 Mar 2017 16:20:06 +0530
From: Abdul Haleem <abdhalee@...ux.vnet.ibm.com>
To: Brian Foster <bfoster@...hat.com>
Cc: linux-xfs@...r.kernel.org, mpe@...erman.id,
linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: 4.11.0-rc1 boot resulted in WARNING: CPU: 14 PID: 1722 at
fs/sysfs/dir.c:31 .sysfs_warn_dup+0x78/0xb0
On Wed, 2017-03-08 at 08:17 -0500, Brian Foster wrote:
> On Tue, Mar 07, 2017 at 10:01:04PM +0530, Abdul Haleem wrote:
> >
> > Hi,
> >
> > Today's mainline (4.11.0-rc1) booted with warnings on Power7 LPAR.
> >
> > Issue is not reproducible all the time.
> >
> > traces:
> > --------
> > Found device VDASD 5.
> > Mounting /home...
> > Reached target Swap.
> > Found device VDASD 2.
> >
> > Mounting /boot...
> >
> > sysfs: cannot create duplicate filename '/fs/xfs/sda'
>
> That is strange. The sysfs name is ultimately based on the superblock id
> (sb->s_id), which afaik should reflect the underlying device and thus be
> unique. Just to be sure, do you otherwise have a mounted and functional
> sysfs dir?
>
> I assume after this boot you have a mounted 'sda' device somewhere.. If
> so, what content already exists under the sysfs fs/xfs/sda subdir when
> the duplicate warning occurs? Has the associated device been
> mounted/unmounted before this occurs, or is there anything abnormal
> going on during boot up, such as device repartitioning, devices coming
> and going, etc..?
Brian, Thanks for looking into this issue.
No, the system is not in same state, it was overwritten by other runs of
Automation framework.
However the boot logs are preserved and attached here.
>
> What does 'mount' show for this system when the problem occurs vs. when
> it doesn't? It might be useful to post the full boot log for when this
> occurs as well.
I do not have any sysfs info when warning occursm but on a normal system
(with out warning):
# mount
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
devtmpfs on /dev type devtmpfs
(rw,nosuid,size=41833088k,nr_inodes=653642,mode=755)
securityfs on /sys/kernel/security type securityfs
(rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
devpts on /dev/pts type devpts
(rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,nodev,mode=755)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755)
cgroup on /sys/fs/cgroup/systemd type cgroup
(rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
cgroup on /sys/fs/cgroup/cpuset type cgroup
(rw,nosuid,nodev,noexec,relatime,cpuset)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup
(rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/freezer type cgroup
(rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/hugetlb type cgroup
(rw,nosuid,nodev,noexec,relatime,hugetlb)
cgroup on /sys/fs/cgroup/devices type cgroup
(rw,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/net_cls type cgroup
(rw,nosuid,nodev,noexec,relatime,net_cls)
cgroup on /sys/fs/cgroup/blkio type cgroup
(rw,nosuid,nodev,noexec,relatime,blkio)
cgroup on /sys/fs/cgroup/memory type cgroup
(rw,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/perf_event type cgroup
(rw,nosuid,nodev,noexec,relatime,perf_event)
configfs on /sys/kernel/config type configfs (rw,relatime)
/dev/sda3 on / type ext4 (rw,relatime,data=ordered)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs
(rw,relatime,fd=24,pgrp=1,timeout=300,minproto=5,maxproto=5,direct)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
mqueue on /dev/mqueue type mqueue (rw,relatime)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,relatime)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
nfsd on /proc/fs/nfsd type nfsd (rw,relatime)
/dev/sda2 on /boot type xfs (rw,relatime,attr2,inode64,noquota)
/dev/sda5 on /home type xfs (rw,relatime,attr2,inode64,noquota)
tmpfs on /run/user/0 type tmpfs
(rw,nosuid,nodev,relatime,size=8375680k,mode=700)
# ls /sys/fs/xfs
sda sda5 stats
# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 40G 0 40G 0% /dev
tmpfs 40G 0 40G 0% /dev/shm
tmpfs 40G 14M 40G 1% /run
tmpfs 40G 0 40G 0% /sys/fs/cgroup
/dev/sda3 394G 17G 358G 5% /
/dev/sda2 40G 673M 40G 2% /boot
/dev/sda5 100G 21G 80G 21% /home
tmpfs 8.0G 0 8.0G 0% /run/user/0
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 256M 0 loop
sda 8:0 0 558.9G 0 disk
├─sda4 8:4 0 1K 0 part
├─sda2 8:2 0 40G 0 part /boot
├─sda5 8:5 0 100G 0 part /home
├─sda3 8:3 0 400G 0 part /
├─sda1 8:1 0 10M 0 part
└─sda6 8:6 0 10G 0 part [SWAP]
# cat /proc/partitions
major minor #blocks name
8 0 586061784 sda
8 1 10240 sda
8 2 41943040 sda
8 3 419430400 sda3
8 4 1 sda
8 5 104857600 sda5
8 6 10485760 sda6
7 0 262144 loop0
# xfs_info /home
meta-data=/dev/sda5 isize=256 agcount=4, agsize=6553600
blks
= sectsz=512 attr=2, projid32bit=1
= crc=0 finobt=0
data = bsize=4096 blocks=26214400,
imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=0
log =internal bsize=4096 blocks=12800, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
# xfs_info /boot/
meta-data=/dev/sda2 isize=256 agcount=4, agsize=2621440
blks
= sectsz=512 attr=2, projid32bit=1
= crc=0 finobt=0
data = bsize=4096 blocks=10485760,
imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=0
log =internal bsize=4096 blocks=5120, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
# fdisk -l
Disk /dev/sda: 600.1 GB, 600127266816 bytes, 1172123568 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0xe2ab0400
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 22527 10240 41 PPC PReP Boot
/dev/sda2 22528 83908607 41943040 83 Linux
/dev/sda3 83908608 922769407 419430400 83 Linux
/dev/sda4 922769408 1172121599 124676096 5 Extended
/dev/sda5 922771456 1132486655 104857600 83 Linux
/dev/sda6 1132488704 1153460223 10485760 82 Linux swap /
Solaris
Please let me know if you need more info.
>
> Brian
>
> > ------------[ cut here ]------------
> > WARNING: CPU: 14 PID: 1722 at fs/sysfs/dir.c:31 .sysfs_warn_dup
> > +0x78/0xb0
> > Modules linked in: sg(E) nfsd(E) auth_rpcgss(E) nfs_acl(E) lockd(E)
> > grace(E) sunrpc(E) binfmt_misc(E) ip_tables(E) ext4(E) mbcache(E)
> > jbd2(E) sd_mod(E) ibmvscsi(E) ibmveth(E) scsi_transport_srp(E)
> > CPU: 14 PID: 1722 Comm: mount Tainted: G W E 4.11.0-rc1-autotest #1
> > task: c0000009ed3f9c80 task.stack: c0000009ed430000
> > NIP: c0000000003a6c68 LR: c0000000003a6c64 CTR: 0000000001764c5c
> > REGS: c0000009ed4333c0 TRAP: 0700 Tainted: G W E (4.11.0-rc1-autotest)
> > MSR: 800000000282b032 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI>
> > CR: 22022822 XER: 00000006
> > CFAR: c000000000994958 SOFTE: 1
> > GPR00: c0000000003a6c64 c0000009ed433640 c00000000138a500 0000000000000035
> > GPR04: c0000009ff88ada0 c0000009ff8a1658 00000000014cfc2c 0000000000000000
> > GPR08: 0000000000000000 c000000000dd146c 00000009feac0000 0000000000003fef
> > GPR12: 0000000022022844 c00000000e9f7e00 0000000037409c40 0000000037409c30
> > GPR16: 0000000037409c28 ffffffffffffffff 0000000000000000 000000003741f1c8
> > GPR20: 00000100147d1270 0000000000000000 00000000c0ed0000 00003fffa0f53384
> > GPR24: c00000000394d178 c000000000c054c0 c000000001742e68 c0000000ff3ea640
> > GPR28: c00000000394d640 c0000013eec28c28 c0000009f2ab0148 c000000003833000
> > NIP [c0000000003a6c68] .sysfs_warn_dup+0x78/0xb0
> > LR [c0000000003a6c64] .sysfs_warn_dup+0x74/0xb0
> > Call Trace:
> > [c0000009ed433640] [c0000000003a6c64] .sysfs_warn_dup+0x74/0xb0 (unreliable)
> > [c0000009ed4336d0] [c0000000003a6de4] .sysfs_create_dir_ns+0xc4/0xd0
> > [c0000009ed433760] [c000000000551048] .kobject_add_internal+0xd8/0x450
> > [c0000009ed433800] [c00000000055141c] .kobject_init_and_add+0x5c/0x90
> > [c0000009ed433890] [c00000000044ac54] .xfs_mountfs+0x224/0xa30
> > [c0000009ed433960] [c000000000452a90] .xfs_fs_fill_super+0x490/0x620
> > [c0000009ed433a10] [c0000000002fefc0] .mount_bdev+0x220/0x260
> > [c0000009ed433ac0] [c0000000004509b8] .xfs_fs_mount+0x18/0x30
> > [c0000009ed433b30] [c000000000300520] .mount_fs+0x70/0x210
> > [c0000009ed433bf0] [c000000000325930] .vfs_kern_mount+0x60/0x1c0
> > [c0000009ed433cb0] [c00000000032a458] .do_mount+0x268/0xee0
> > [c0000009ed433d90] [c00000000032b4ec] .SyS_mount+0x8c/0x100
> > [c0000009ed433e30] [c00000000000b184] system_call+0x38/0xe0
> > Instruction dump:
> > 7fa3eb78 38800000 7fe5fb78 38c01000 4bffa929 60000000 3c62ff8b 7fe4fb78
> > 38636ec8 7fc5f378 485edcb9 60000000 <0fe00000> 7fe3fb78 4bf1fb01 60000000
> > ---[ end trace 78f08bafbc2388f3 ]---
> > kobject_add_internal failed for sda with -EEXIST, don't try to register
> > things with the same name in the same directory.
> >
> >
> > --
> > Regard's
> >
> > Abdul Haleem
> > IBM Linux Technology Centre
> >
> >
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-xfs" in
> > the body of a message to majordomo@...r.kernel.org
> > More majordomo info at http://vger.kernel.org/majordomo-info.html
>
--
Regard's
Abdul Haleem
IBM Linux Technology Centre
View attachment "xfs-warning-dmesg.txt" of type "text/plain" (42115 bytes)
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