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From: Ming Lin <mlin@kernel.org>
To: "Георгий Стариков" <gstarikov@gmail.com>
Cc: linux-bcache@vger.kernel.org
Subject: Re: cant mount bcachefs
Date: Wed, 29 Jul 2015 16:09:04 -0700	[thread overview]
Message-ID: <CAF1ivSagk2UWnx81XDhhS=sa3FezZVu11N06obbBMd_dtSS5PA@mail.gmail.com> (raw)
In-Reply-To: <CAOOKTyAb5Es0Wb=CTF0DeiUzkYvqjw0we0j_z6L+vbRqR1zvnw@mail.gmail.com>

On Wed, Jul 29, 2015 at 3:36 PM, Георгий Стариков <gstarikov@gmail.com> wrote:
> there is no messages in dmesg in case of mount attempt.
> after reboot dmesg contain many messages like this one:

I just tried to boot old bcache device with bcachefs kernel and it locked too.
If you just want to have a try bcachefs, you can do below to disable
register the old bcache device.

root@bee:/lib/udev/rules.d# ls *bcache*
69-bcache.rules
root@bee:/lib/udev/rules.d# mv 69-bcache.rules 69-bcache.rules.bak
root@bee:/lib/udev/rules.d# ls *bcache*
69-bcache.rules.bak


> [Пт. июля 17 13:11:50 2015] INFO: task bcache-register:340 blocked for
> more than 120 seconds.
> [Пт. июля 17 13:11:50 2015]       Tainted: G            E   4.1.0+ #1
> [Пт. июля 17 13:11:50 2015] "echo 0 >
> /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [Пт. июля 17 13:11:50 2015] bcache-register D ffff88005fa0fbf8     0
> 340      1 0x00000004
> [Пт. июля 17 13:11:50 2015]  ffff88005fa0fbf8 ffffffff81c14580
> ffff88002d961420 ffff88005fa0fc28
> [Пт. июля 17 13:11:50 2015]  ffff88005fa10000 ffffffffc02536a4
> ffff88002d961420 00000000ffffffff
> [Пт. июля 17 13:11:50 2015]  ffffffffc02536a8 ffff88005fa0fc18
> ffffffff817d9367 ffff88006d260010
> [Пт. июля 17 13:11:50 2015] Call Trace:
> [Пт. июля 17 13:11:50 2015]  [<ffffffff817d9367>] schedule+0x37/0x90
> [Пт. июля 17 13:11:50 2015]  [<ffffffff817d96fe>]
> schedule_preempt_disabled+0xe/0x10
> [Пт. июля 17 13:11:50 2015]  [<ffffffff817db4f5>]
> __mutex_lock_slowpath+0x95/0x110
> [Пт. июля 17 13:11:50 2015]  [<ffffffff817d5487>] ? printk+0x46/0x48
> [Пт. июля 17 13:11:50 2015]  [<ffffffff817db593>] mutex_lock+0x23/0x40
> [Пт. июля 17 13:11:50 2015]  [<ffffffffc01f70bc>]
> bch_backing_dev_register+0x3ac/0x430 [bcache]
> [Пт. июля 17 13:11:50 2015]  [<ffffffffc022d0e5>]
> bch_register_one+0xf5/0x310 [bcache]
> [Пт. июля 17 13:11:50 2015]  [<ffffffffc022d362>]
> register_bcache+0x62/0xd0 [bcache]
> [Пт. июля 17 13:11:50 2015]  [<ffffffff81278c57>] kernfs_fop_write+0x127/0x180
> [Пт. июля 17 13:11:50 2015]  [<ffffffff811fc6f8>] __vfs_write+0x28/0xf0
> [Пт. июля 17 13:11:50 2015]  [<ffffffff811ff3ac>] ? __sb_start_write+0x4c/0x100
> [Пт. июля 17 13:11:50 2015]  [<ffffffff81322343>] ?
> security_file_permission+0x23/0xa0
> [Пт. июля 17 13:11:50 2015]  [<ffffffff811fce29>] vfs_write+0xa9/0x1b0
> [Пт. июля 17 13:11:50 2015]  [<ffffffff811fdbf6>] SyS_write+0x46/0xb0
> [Пт. июля 17 13:11:50 2015]  [<ffffffff81066f3f>] ? do_page_fault+0x2f/0x80
> [Пт. июля 17 13:11:50 2015]  [<ffffffff817dd932>] system_call_fastpath+0x16/0x75
>
>
> root@bcache:~# ps -ax | grep mount
>   999 ?        D      0:00 mount /dev/sdb /test_bcachefs/
>  1731 ?        S      0:00 strace -v mount /dev/sdd /test_bcachefs
>  1734 ?        D      0:00 mount /dev/sdd /test_bcachefs
>  1746 ?        S      0:00 strace -v -o bcache_mount_strace.txt mount
> /dev/sdd /test_bcachefs
>  1749 ?        D      0:00 mount /dev/sdd /test_bcachefs
>  2062 ?        D      0:00 mount -t bcache /dev/sdd /test_bcachefs
>  2197 pts/3    D+     0:00 mount /dev/sdd /test_bcachefs
>
> root@bcache:~# cat /proc/999/stack
> [<ffffffffc0229f01>] read_super+0x2d1/0x420 [bcache]
> [<ffffffffc022ce24>] bch_register_cache_set+0x104/0x2d0 [bcache]
> [<ffffffffc02146b3>] bch_mount+0x123/0x330 [bcache]
> [<ffffffff81200c78>] mount_fs+0x38/0x190
> [<ffffffff8121d65b>] vfs_kern_mount+0x6b/0x120
> [<ffffffff81220654>] do_mount+0x204/0xb60
> [<ffffffff812212cb>] SyS_mount+0x8b/0xd0
> [<ffffffff817dd932>] system_call_fastpath+0x16/0x75
> [<ffffffffffffffff>] 0xffffffffffffffff
>
>
> root@bcache:~# cat /proc/2197/stack
> [<ffffffffc0229f01>] read_super+0x2d1/0x420 [bcache]
> [<ffffffffc022ce24>] bch_register_cache_set+0x104/0x2d0 [bcache]
> [<ffffffffc02146b3>] bch_mount+0x123/0x330 [bcache]
> [<ffffffff81200c78>] mount_fs+0x38/0x190
> [<ffffffff8121d65b>] vfs_kern_mount+0x6b/0x120
> [<ffffffff81220654>] do_mount+0x204/0xb60
> [<ffffffff812212cb>] SyS_mount+0x8b/0xd0
> [<ffffffff817dd932>] system_call_fastpath+0x16/0x75
> [<ffffffffffffffff>] 0xffffffffffffffff
>
> 2015-07-29 23:16 GMT+03:00 Ming Lin <mlin@kernel.org>:
>> On Wed, Jul 29, 2015 at 10:36 AM, Георгий Стариков <gstarikov@gmail.com> wrote:
>>> Hello,
>>> I followed instruction at http://bcache.evilpiepirate.org/ and it cant mount...
>>> What I'm doing wrong?
>>>
>>>
>>> I make:
>>>
>>> git clone -b bcache-dev http://evilpiepirate.org/git/linux-bcache.git
>>> git clone -b dev http://evilpiepirate.org/git/bcache-tools.git
>>>
>>> cd bcache-tools/linux-bcache/
>>> make oldconfig
>>> make -j6 deb-pkg
>>> make -j6 modules_install
>>> make -j6 install
>>> reboot
>>>
>>> wipefs -a /dev/sdd
>>>
>>> Then, just run
>>>
>>> bcacheadm format -C /dev/sdd
>>> strace -v -o bcache_mount_strace.txt mount /dev/sdd /test_bcachefs
>>>
>>> and it hangup....
>>
>> Any message in dmesg?
>>
>> Could you do:
>>
>> cat  /proc/`pidof mount`/stack
>>
>>>
>>> root@bcache:~# tail bcache_mount_strace.txt
>>> geteuid()                               = 0
>>> getgid()                                = 0
>>> getegid()                               = 0
>>> prctl(PR_GET_DUMPABLE)                  = 1
>>> stat("/run", {st_dev=makedev(0, 18), st_ino=2625,
>>> st_mode=S_IFDIR|0755, st_nlink=23, st_uid=0, st_gid=0,
>>> st_blksize=4096, st_blocks=0, st_size=740,
>>> st_atime=2015/07/17-13:07:47, st_mtime=2015/07/29-14:20:25,
>>> st_ctime=2015/07/29-14:20:25}) = 0
>>> lstat("/etc/mtab", {st_dev=makedev(8, 1), st_ino=131233,
>>> st_mode=S_IFLNK|0777, st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096,
>>> st_blocks=0, st_size=12, st_atime=2015/07/29-06:40:34,
>>> st_mtime=2015/07/12-10:40:12, st_ctime=2015/07/12-10:40:12}) = 0
>>> lstat("/run/mount/utab", {st_dev=makedev(0, 18), st_ino=1968,
>>> st_mode=S_IFREG|0644, st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096,
>>> st_blocks=0, st_size=0, st_atime=2015/07/17-13:10:49,
>>> st_mtime=2015/07/17-13:10:49, st_ctime=2015/07/17-13:10:49}) = 0
>>> open("/run/mount/utab", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 3
>>> close(3)                                = 0
>>> mount("/dev/sdd", "/test_bcachefs", "bcache", MS_MGC_VAL, NULL

  parent reply	other threads:[~2015-07-29 23:09 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CAOOKTyBohkud24RBZegyHhEqpo+FV6H-o2MgPyr+CVvSvc1s-A@mail.gmail.com>
2015-07-29 17:36 ` Fwd: cant mount bcachefs Георгий Стариков
2015-07-29 20:16   ` Ming Lin
     [not found]     ` <CAOOKTyAb5Es0Wb=CTF0DeiUzkYvqjw0we0j_z6L+vbRqR1zvnw@mail.gmail.com>
2015-07-29 23:09       ` Ming Lin [this message]
2015-07-30  0:05         ` Георгий Стариков

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