From: Nikolaus Rath <Nikolaus@rath.org>
To: linux-btrfs@vger.kernel.org
Subject: blocked tasks right after mounting (was: Hang when trying to access fs)
Date: Sat, 28 Jan 2012 10:23:53 -0500 [thread overview]
Message-ID: <87zkd73l6e.fsf@vostro.rath.org> (raw)
In-Reply-To: <874nvf50bm.fsf@vostro.rath.org> (Nikolaus Rath's message of "Sat, 28 Jan 2012 10:11:25 -0500")
Nikolaus Rath <Nikolaus@rath.org> writes:
> Hello,
>
> When trying to rsync to btrfs, the process just hangs. dmesg output
> alternates between:
[...]
I guess I should also mention that this is reproducible, and I don't
even need to run rsync. Simply mounting the file system produces a
similar warning soon afterwards:
[ 678.316046] usb 1-4: new high speed USB device number 7 using ehci_h=
cd
[ 678.448928] usb 1-4: New USB device found, idVendor=3D152d, idProduc=
t=3D2509
[ 678.448931] usb 1-4: New USB device strings: Mfr=3D10, Product=3D11,=
SerialNumber=3D3
[ 678.448933] usb 1-4: Product: Usb production
[ 678.448934] usb 1-4: Manufacturer: Jmicron Corp.
[ 678.448936] usb 1-4: SerialNumber: 00A123456789
[ 678.450429] scsi7 : usb-storage 1-4:1.0
[ 681.372710] scsi 7:0:0:0: Direct-Access WDC WD50 01AALS-00L3B2 =
0000 PQ: 0 ANSI: 2 CCS
[ 681.658185] sd 7:0:0:0: [sdg] 976773168 512-byte logical blocks: (50=
0 GB/465 GiB)
[ 681.658925] sd 7:0:0:0: [sdg] Write Protect is off
[ 681.658929] sd 7:0:0:0: [sdg] Mode Sense: 28 00 00 00
[ 681.659675] sd 7:0:0:0: [sdg] No Caching mode page present
[ 681.659679] sd 7:0:0:0: [sdg] Assuming drive cache: write through
[ 681.662049] sd 7:0:0:0: [sdg] No Caching mode page present
[ 681.662052] sd 7:0:0:0: [sdg] Assuming drive cache: write through
[ 681.670316] sdg: sdg1
[ 681.673554] sd 7:0:0:0: [sdg] No Caching mode page present
[ 681.673558] sd 7:0:0:0: [sdg] Assuming drive cache: write through
[ 681.673562] sd 7:0:0:0: [sdg] Attached SCSI disk
[ 791.512475] Btrfs loaded
[ 791.513625] device label Videos devid 1 transid 142 /dev/mapper/udis=
ks-luks-uuid-7adf0c16-c741-485e-86dd-8a209fe4ce85-uid1000
[ 791.567843] btrfs: disk space caching is enabled
[ 960.456073] INFO: task sync:4930 blocked for more than 120 seconds.
[ 960.456077] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disab=
les this message.
[ 960.456080] sync D ffff8800bfc92f40 0 4930 1 0x=
00000000
[ 960.456085] ffff88009f4d5790 0000000000000082 0000000000000000 ffff=
8800bbf080c0
[ 960.456089] 0000000000012f40 ffff88009f4d7fd8 ffff88009f4d7fd8 ffff=
88009f4d5790
[ 960.456094] 0000000000000246 000000018132de1c ffff880091d342f0 ffff=
88008686ae80
[ 960.456098] Call Trace:
[ 960.456117] [<ffffffffa05aed19>] ? wait_current_trans.isra.22+0xae/=
0xdd [btrfs]
[ 960.456123] [<ffffffff8105ec6b>] ? add_wait_queue+0x3c/0x3c
[ 960.456137] [<ffffffffa05aff82>] ? start_transaction+0x231/0x246 [b=
trfs]
[ 960.456141] [<ffffffff81114543>] ? __sync_filesystem+0x6e/0x6e
[ 960.456150] [<ffffffffa0594357>] ? btrfs_sync_fs+0x79/0x95 [btrfs]
[ 960.456153] [<ffffffff8111452b>] ? __sync_filesystem+0x56/0x6e
[ 960.456157] [<ffffffff810f6578>] ? iterate_supers+0x5e/0xab
[ 960.456160] [<ffffffff811145cd>] ? sys_sync+0x3d/0x52
[ 960.456164] [<ffffffff81332e12>] ? system_call_fastpath+0x16/0x1b
Best,
-Nikolaus
--=20
=C2=BBTime flies like an arrow, fruit flies like a Banana.=C2=AB
PGP fingerprint: 5B93 61F8 4EA2 E279 ABF6 02CF A9AD B7F8 AE4E 425C
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next prev parent reply other threads:[~2012-01-28 15:23 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-28 15:11 Hang when trying to access fs Nikolaus Rath
2012-01-28 15:23 ` Nikolaus Rath [this message]
2012-01-29 2:59 ` blocked tasks right after mounting (was: Hang when trying to access fs) Duncan
2012-01-29 4:07 ` blocked tasks right after mounting Nikolaus Rath
2012-01-29 5:45 ` Duncan
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