Apr 30, 2024 · Operations

Why Does Linux Show “watchdog: BUG: soft lockup” and How to Fix It?

Linux’s “watchdog: BUG: soft lockup – CPU#1 stuck” warning indicates a CPU soft lockup, caused by driver bugs, hardware faults, or kernel issues, and can be resolved by updating software, monitoring hardware, analyzing logs, and implementing preventive performance and hardware checks.

CPULinuxkernel

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Why Does Linux Show “watchdog: BUG: soft lockup” and How to Fix It?

Tencent Database Technology

May 17, 2018 · Operations

Analysis of ext4 Soft Lockup Caused by Extent Status LRU Lock Contention in Linux 3.10

This article examines a Linux 3.10 kernel soft‑lockup bug where the ext4 extent‑status LRU spin‑lock is held for over 20 seconds under memory pressure, explains the ext4 delayed‑allocation mechanism, block lookup process, extent‑status cache shrinkage, and presents the community's mitigation approach.

LRU spin lockLinux kernelext4

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Analysis of ext4 Soft Lockup Caused by Extent Status LRU Lock Contention in Linux 3.10