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softlockup may occur when the dev_info operation is performed in the critical area of the RCU. #30

@leedykop

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@leedykop

rcu_read_lock();

When the kernel printk console level is set to 7 or higher, logs printed by dev_info are output to the console. The driver thread needs to obtain console_sem. A large number of logs may cause watchdog timeout (soft lockup).

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