[ale] Flash drive format - kworker errors

Lightner, Jeffrey JLightner at dsservices.com
Tue Jul 19 08:22:23 EDT 2016 

We quit using ext3 some time ago because many operations were quite slow on TB sized filesystems including simply removing files.    Does Ubuntu not support ext4?

As to fake flash drives I've not seen that - is it possible these have dos partition tables rather than gpt?   I've seen issues where drives initially appeared to have less space than claimed like you mention but it was always because they were using dos and converting to gpt made the rest of the space visible (to the degree that space is "usable" rather than "raw" which is the usual marketing weasel word to explain the usual discrepancy).  


-----Original Message-----
From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of DJ-Pfulio
Sent: Tuesday, July 19, 2016 7:08 AM
To: ale at ale.org
Subject: Re: [ale] Flash drive format - kworker errors

None ideas on this specific effort, but there are lots or fake flash memory devices out there. My first order of business with all of them is to write the amount of data on them that it is supposed to support, then read that back off and verify that every bit written was also stored.  Lots of these devices only have 8G or half of the amount claimed on the package, but they change to chip to report 64G. The only way to know is by shoving data on and pulling it off then verifying 59G (format wasted space) or so pulled off matches.

I've had issues with 64 and larger flash devices not working except with FAT32 formats, but my sample size is only 2, so that shouldn't be indicative of anything really. Not exactly a large statistical sample size for anyone else to make decisions.

Sadly, the main devices I use flash memory WITH only support NTFS or FAT32.
Don't use flash to extend Linux system storage myself.

On 07/18/2016 08:43 PM, Tom & JaVonn wrote:
> All:
> 
> All my searches have turned up few clues.
> 
> Bought a pair of PNY 64 GB USB 3 Type A flash drives on sale, and 
> they're highly rated.  Tried to format ext3 and it took literally a 
> couple of hours, though it looked normal at first.  Tried in both USB 
> 3 and USB 2 slots of original PC, then again in USB 2 of another PC.
> 
> syslog shows lots of Call Traces by kworker.
> 
> Here's my second attempt, plain ext2:
> ----------------------------------------------------------------------
> ------------------------------
> 
> ubuntu-gnome at ubuntu-gnome:~$ sudo mke2fs -m 2 /dev/sda1 mke2fs 1.42.13 
> (17-May-2015) Creating filesystem with 15728640 4k blocks and 3932160 
> inodes Filesystem UUID: 03ce1128-2ef5-4d2c-926f-3a131a65c617
> Superblock backups stored on blocks:
>     32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
>     4096000, 7962624, 11239424
> 
> Allocating group tables: done
> Writing inode tables: done
> Writing superblocks and filesystem accounting information: done
> 
> ubuntu-gnome at ubuntu-gnome:~$
> ----------------------------------------------------------------------
> ------ What shows in syslog, with a new Call Trace every 2 minutes:
> 
> Jul 18 20:50:25 ubuntu-gnome kernel: [  786.745662]  sda: sda1 Jul 18 
> 20:50:25 ubuntu-gnome kernel: [  787.279540]  sda: sda1 Jul 18 
> 20:50:31 ubuntu-gnome kernel: [  793.247853]  sda: sda1 Jul 18 
> 20:50:34 ubuntu-gnome AptDaemon: INFO: Quitting due to inactivity Jul 
> 18 20:50:34 ubuntu-gnome AptDaemon: INFO: Quitting was requested Jul 
> 18 20:50:34 ubuntu-gnome org.freedesktop.PackageKit[1039]: 20:50:34 
> AptDaemon [INFO]: Quitting due to inactivity Jul 18 20:50:34 
> ubuntu-gnome org.freedesktop.PackageKit[1039]: 20:50:34 AptDaemon 
> [INFO]: Quitting was requested Jul 18 20:52:23 ubuntu-gnome 
> systemd[1]: Starting Cleanup of Temporary Directories...
> Jul 18 20:52:23 ubuntu-gnome systemd-tmpfiles[2455]:
> [/usr/lib/tmpfiles.d/var.conf:14] Duplicate line for path "/var/log", ignoring.
> Jul 18 20:52:23 ubuntu-gnome systemd[1]: Started Cleanup of Temporary Directories.
> Jul 18 21:17:01 ubuntu-gnome CRON[2520]: (root) CMD (   cd / && run-parts
> --report /etc/cron.hourly)
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168038] INFO: task
> kworker/u16:1:2537 blocked for more than 120 seconds.
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168043]       Not tainted
> 4.4.0-21-generic #37-Ubuntu
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168045] "echo 0 > 
> /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168047] kworker/u16:1 D
> ffff88010645fa98     0  2537      2 0x00000000
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168056] Workqueue:
> events_freezable_power_ disk_events_workfn Jul 18 21:37:18 
> ubuntu-gnome kernel: [ 3600.168059] ffff88010645fa98
> ffff88010645fa70 ffff88010bd03300 ffff8800d85b6600 Jul 18 21:37:18 
> ubuntu-gnome kernel: [ 3600.168062] ffff880106460000
> ffff880117c56d00 7fffffffffffffff ffff880112b273d0 Jul 18 21:37:18 
> ubuntu-gnome kernel: [ 3600.168065] ffff880112b27360
> ffff88010645fab0 ffffffff818203f5 0000000000000000 Jul 18 21:37:18 
> ubuntu-gnome kernel: [ 3600.168068] Call Trace:
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168074] 
> [<ffffffff818203f5>]
> schedule+0x35/0x80
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168078] 
> [<ffffffff81823515>]
> schedule_timeout+0x1b5/0x270
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168082] [<ffffffff810b23ec>] ?
> __enqueue_entity+0x6c/0x70
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168085] [<ffffffff810b7fd2>] ?
> enqueue_entity+0x3a2/0xc70
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168088] [<ffffffff813fdfe5>] ?
> find_next_bit+0x15/0x20
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168091] [<ffffffff810b32bd>] ?
> select_idle_sibling+0xbd/0x120
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168094] 
> [<ffffffff8181f944>]
> io_schedule_timeout+0xa4/0x110
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168097] 
> [<ffffffff813b91b1>]
> get_request+0x411/0x790
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168101] [<ffffffff810c3a10>] ?
> wake_atomic_t_function+0x60/0x60
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168104] 
> [<ffffffff813b95bb>]
> blk_get_request+0x8b/0xf0
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168107] 
> [<ffffffff815ad1bd>]
> scsi_execute+0x3d/0x1d0
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168110] 
> [<ffffffff815aeefe>]
> scsi_execute_req_flags+0x8e/0xf0
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168113] 
> [<ffffffff815af601>]
> scsi_test_unit_ready+0x91/0x150
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168117] 
> [<ffffffff815bd552>]
> sd_check_events+0x132/0x190
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168120] 
> [<ffffffff813cad60>]
> disk_check_events+0x60/0x150
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168123] 
> [<ffffffff813cae66>]
> disk_events_workfn+0x16/0x20
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168126] 
> [<ffffffff81099ff2>]
> process_one_work+0x162/0x480
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168129] 
> [<ffffffff8109a35b>]
> worker_thread+0x4b/0x4c0
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168131] [<ffffffff8109a310>] ?
> process_one_work+0x480/0x480
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168134] [<ffffffff8109a310>] ?
> process_one_work+0x480/0x480
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168137] 
> [<ffffffff810a0528>]
> kthread+0xd8/0xf0
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168140] [<ffffffff810a0450>] ?
> kthread_create_on_node+0x1e0/0x1e0
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168143] 
> [<ffffffff8182488f>]
> ret_from_fork+0x3f/0x70
> Jul 18 21:37:18 ubuntu-gnome kernel: [ 3600.168146] [<ffffffff810a0450>] ?
> kthread_create_on_node+0x1e0/0x1e0
> Jul 18 21:37:59 ubuntu-gnome systemd[1]: Started CUPS Scheduler.
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168026] INFO: task 
> kworker/u16:0:6 blocked for more than 120 seconds.
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168032]       Not tainted
> 4.4.0-21-generic #37-Ubuntu
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168033] "echo 0 > 
> /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168035] kworker/u16:0 D
> ffff88011280b638     0     6      2 0x00000000
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168044] Workqueue: 
> writeback wb_workfn (flush-8:0) Jul 18 21:39:18 ubuntu-gnome kernel: [ 
> 3720.168047] ffff88011280b638
> ffff880112b27470 ffff8800d93aa640 ffff880112fb3fc0 Jul 18 21:39:18 
> ubuntu-gnome kernel: [ 3720.168051] ffff88011280c000
> ffff880117c16d00 7fffffffffffffff ffff880112b273b8 Jul 18 21:39:18 
> ubuntu-gnome kernel: [ 3720.168054] ffff880112b27360
> ffff88011280b650 ffffffff818203f5 0000000000000000 Jul 18 21:39:18 
> ubuntu-gnome kernel: [ 3720.168057] Call Trace:
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168063] 
> [<ffffffff818203f5>]
> schedule+0x35/0x80
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168066] 
> [<ffffffff81823515>]
> schedule_timeout+0x1b5/0x270
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168070] [<ffffffff813b5793>] ?
> queue_unplugged+0xa3/0xb0
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168073] 
> [<ffffffff8181f944>]
> io_schedule_timeout+0xa4/0x110
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168076] 
> [<ffffffff813b91b1>]
> get_request+0x411/0x790
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168080] [<ffffffff810c3a10>] ?
> wake_atomic_t_function+0x60/0x60
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168084] 
> [<ffffffff813bb895>]
> blk_queue_bio+0x125/0x3e0
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168086] 
> [<ffffffff813b9c62>]
> generic_make_request+0xf2/0x1d0
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168089] 
> [<ffffffff813b9db6>]
> submit_bio+0x76/0x170
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168092] 
> [<ffffffff81244b0f>]
> submit_bh_wbc+0x12f/0x160
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168095] 
> [<ffffffff81246ae5>]
> __block_write_full_page.constprop.38+0x115/0x3a0
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168098] [<ffffffff812470d0>] ?
> I_BDEV+0x20/0x20
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168100] [<ffffffff812470d0>] ?
> I_BDEV+0x20/0x20
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168103] 
> [<ffffffff81246eb5>]
> block_write_full_page+0x145/0x170
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168106] 
> [<ffffffff81247ca8>]
> blkdev_writepage+0x18/0x20
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168109] 
> [<ffffffff81198513>]
> __writepage+0x13/0x30
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168112] 
> [<ffffffff8119900e>]
> write_cache_pages+0x1ee/0x510
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168115] [<ffffffff81198500>] ?
> wb_position_ratio+0x1f0/0x1f0
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168118] 
> [<ffffffff81199381>]
> generic_writepages+0x51/0x80
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168121] [<ffffffff810b7fd2>] ?
> enqueue_entity+0x3a2/0xc70
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168124] 
> [<ffffffff8119b7fe>]
> do_writepages+0x1e/0x30
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168127] 
> [<ffffffff8123b055>]
> __writeback_single_inode+0x45/0x330
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168129] 
> [<ffffffff8123b852>]
> writeback_sb_inodes+0x262/0x590
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168133] 
> [<ffffffff8123bc0c>]
> __writeback_inodes_wb+0x8c/0xc0
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168135] 
> [<ffffffff8123bf63>]
> wb_writeback+0x253/0x310
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168138] 
> [<ffffffff8123c7dd>]
> wb_workfn+0x24d/0x400
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168142] 
> [<ffffffff81099ff2>]
> process_one_work+0x162/0x480
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168145] 
> [<ffffffff8109a35b>]
> worker_thread+0x4b/0x4c0
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168148] [<ffffffff8109a310>] ?
> process_one_work+0x480/0x480
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168151] 
> [<ffffffff810a0528>]
> kthread+0xd8/0xf0
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168153] [<ffffffff810a0450>] ?
> kthread_create_on_node+0x1e0/0x1e0
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168157] 
> [<ffffffff8182488f>]
> ret_from_fork+0x3f/0x70
> Jul 18 21:39:18 ubuntu-gnome kernel: [ 3720.168159] [<ffffffff810a0450>] ?
> kthread_create_on_node+0x1e0/0x1e0
> Jul 18 21:40:01 ubuntu-gnome 
> org.gnome.evolution.dataserver.Sources5[1422]: **
> (evolution-source-registry:1815): WARNING **: 
> secret_service_search_sync: must specify at least one attribute to 
> match ...
> 
> Any insight???
> 
> Thanks,
> Tom
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