Had this again 20 minutes ago. Was dopying 8.7GiB of data from one directory to another directory on the same filesystem (ext4 (rw,relatime,data=ordered)) on the same disk (Western Digital WDC WD30EZRX-00D8PB0 spinning metal disk).
The KDE UI became unresponsive (Everything other than /home and user data in on a SSD), could not launch any new applications. Opening a new tab on Firefox to go to Youtube didnt load the page, and kept saying waiting for youtube.com in the status bar (network gets halted?). dmesg shows these, are they important? [25013.905943] INFO: task DOMCacheThread:17496 blocked for more than 120 seconds. [25013.905945] Tainted: P OE 4.15.0-54-generic #58-Ubuntu [25013.905947] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [25013.905949] DOMCacheThread D 0 17496 2243 0x00000000 [25013.905951] Call Trace: [25013.905954] __schedule+0x291/0x8a0 [25013.905957] schedule+0x2c/0x80 [25013.905959] jbd2_log_wait_commit+0xb0/0x120 [25013.905962] ? wait_woken+0x80/0x80 [25013.905965] __jbd2_journal_force_commit+0x61/0xb0 [25013.905967] jbd2_journal_force_commit+0x21/0x30 [25013.905970] ext4_force_commit+0x29/0x2d [25013.905972] ext4_sync_file+0x14a/0x3b0 [25013.905975] vfs_fsync_range+0x51/0xb0 [25013.905977] do_fsync+0x3d/0x70 [25013.905980] SyS_fsync+0x10/0x20 [25013.905982] do_syscall_64+0x73/0x130 [25013.905985] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [25013.905987] RIP: 0033:0x7fc9cb839b07 [25013.905988] RSP: 002b:00007fc9a7aeb200 EFLAGS: 00000293 ORIG_RAX: 000000000000004a [25013.905990] RAX: ffffffffffffffda RBX: 00000000000000a0 RCX: 00007fc9cb839b07 [25013.905992] RDX: 0000000000000000 RSI: 00007fc9a7aeaff0 RDI: 00000000000000a0 [25013.905993] RBP: 0000000000000000 R08: 0000000000000000 R09: 72732f656d6f682f [25013.905994] R10: 0000000000000000 R11: 0000000000000293 R12: 00000000000001f6 [25013.905995] R13: 00007fc97fc5d038 R14: 00007fc9a7aeb340 R15: 00007fc987523380 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/336652 Title: Poor system performance under I/O load Status in Linux: Fix Released Status in linux package in Ubuntu: Incomplete Bug description: This bug seems to particularly affect the Dell Latitude D420, D430 and (from the kernel.org bug) at least the D830 laptop models; but others have been reported. Under I/O load, which need not be excessive - running usb-creator or even just checking one's email - the system performs remarkably poorly, far less than other laptop users see. It can often take minutes to open a window, and sometimes the screen isn't repainted. Certainly most applications are "dimmed" by Compiz under I/O. It also appears to massively negatively affect boot performance, with one core spending its entire time in I/O wait - something we don't see elsewhere. To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/336652/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
