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Kotrfa

Member

Registered: 2012-10-25

Posts: 213

[SOLVED]"kernel: task blocked for more than 120 seconds"

Hello,

today I just found this weird message in journalctl after running "pacman -Syu". Everything (even the update) worked fine, nothing unexpected had happened. RPi works as expected. I just wan't to be sure that this problem is not signaling something bigger.

Jun 16 09:17:06 smecpi sudo[6228]: puser : TTY=pts/0 ; PWD=/home/puser ; USER=root ; COMMAND=/usr/bin/pacman -Syu
Jun 16 09:17:06 smecpi sudo[6228]: pam_unix(sudo:session): session opened for user root by puser(uid=0)
Jun 16 09:19:53 smecpi kernel: INFO: task kworker/u2:0:6233 blocked for more than 120 seconds.
Jun 16 09:19:53 smecpi kernel:       Not tainted 3.12.21-1-ARCH #1
Jun 16 09:19:53 smecpi kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Jun 16 09:19:53 smecpi kernel: kworker/u2:0    D c05ce278     0  6233      2 0x00000000
Jun 16 09:19:53 smecpi kernel: Workqueue: kmmcd mmc_rescan
Jun 16 09:19:53 smecpi kernel: [<c05ce278>] (__schedule+0x290/0x5ec) from [<c04c43a0>] (__mmc_claim_host+0x90/0x1f0)
Jun 16 09:19:53 smecpi kernel: [<c04c43a0>] (__mmc_claim_host+0x90/0x1f0) from [<c04cab3c>] (mmc_sd_detect+0x1c/0x70)
Jun 16 09:19:53 smecpi kernel: [<c04cab3c>] (mmc_sd_detect+0x1c/0x70) from [<c04c6880>] (mmc_rescan+0x20c/0x3c8)
Jun 16 09:19:53 smecpi kernel: [<c04c6880>] (mmc_rescan+0x20c/0x3c8) from [<c003b9b8>] (process_one_work+0x130/0x43c)
Jun 16 09:19:53 smecpi kernel: [<c003b9b8>] (process_one_work+0x130/0x43c) from [<c003c908>] (worker_thread+0x134/0x3e4)
Jun 16 09:19:53 smecpi kernel: [<c003c908>] (worker_thread+0x134/0x3e4) from [<c0042544>] (kthread+0xa4/0xb0)
Jun 16 09:19:53 smecpi kernel: [<c0042544>] (kthread+0xa4/0xb0) from [<c000e178>] (ret_from_fork+0x14/0x3c)

Last edited by Kotrfa (2014-06-16 11:41:42)

samiam

Banned

From: EAX

Registered: 2010-08-20

Posts: 58

Re: [SOLVED]"kernel: task blocked for more than 120 seconds"

Ir means just what it says. kworker (a kernel worker thread - https://raw.githubusercontent.com/torva … kqueue.txt) blocked for more than 120 seconds. This likely happened during one of pacman's big calculation jobs, and is also likely completely safe to ignore.

Last edited by samiam (2014-06-16 10:20:13)

Kotrfa

Member

Registered: 2012-10-25

Posts: 213

Re: [SOLVED]"kernel: task blocked for more than 120 seconds"

Thank you very much. Solved.