From: bugzilla-daemon@kernel.org
To: linux-f2fs-devel@lists.sourceforge.net
Subject: [f2fs-dev] [Bug 216050] f2fs_gc occupies 100% cpu
Date: Tue, 23 Aug 2022 22:31:40 +0000 [thread overview]
Message-ID: <bug-216050-202145-ZsB6vmzUZ4@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-216050-202145@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=216050
bogdan.nicolae@gmail.com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bogdan.nicolae@gmail.com
--- Comment #55 from bogdan.nicolae@gmail.com ---
This problem still persists in kernel 5.19.3.
As mentioned before, f2fs_gc stays at 100% CPU utilization indefinitely:
247 root 20 0 0 0 0 R 99.7 0.0 90:30.67 f2fs_gc-8:4
Here is the call trace causing a hang:
kernel: INFO: task f2fs_ckpt-8:4:244 blocked for more than 122 seconds.
kernel: Not tainted 5.19.3-arch1-1 #1
kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
kernel: task:f2fs_ckpt-8:4 state:D stack: 0 pid: 244 ppid: 2
flags:0x00004000
kernel: Call Trace:
kernel: <TASK>
kernel: __schedule+0x356/0x11a0
kernel: ? preempt_schedule+0x43/0x60
kernel: schedule+0x5e/0xd0
kernel: rwsem_down_write_slowpath+0x335/0x720
kernel: ? __schedule+0x35e/0x11a0
kernel: ? __checkpoint_and_complete_reqs+0x1b0/0x1b0 [f2fs
d8aa87b5c63297ab56225cbf829d392db2a7d54b]
kernel: __checkpoint_and_complete_reqs+0x7a/0x1b0 [f2fs
d8aa87b5c63297ab56225cbf829d392db2a7d54b]
kernel: ? __checkpoint_and_complete_reqs+0x1b0/0x1b0 [f2fs
d8aa87b5c63297ab56225cbf829d392db2a7d54b]
kernel: issue_checkpoint_thread+0x4c/0x110 [f2fs
d8aa87b5c63297ab56225cbf829d392db2a7d54b]
kernel: ? cpuacct_percpu_seq_show+0x20/0x20
kernel: kthread+0xde/0x110
kernel: ? kthread_complete_and_exit+0x20/0x20
kernel: ret_from_fork+0x22/0x30
kernel: </TASK>
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Thread overview: 182+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-30 11:28 [f2fs-dev] [Bug 216050] New: fsfs_gc occupies 100% cpu bugzilla-daemon
2022-05-30 11:52 ` [f2fs-dev] [Bug 216050] " bugzilla-daemon
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