On 2022-02-15, Daniel Bristot de Oliveira <bristot@xxxxxxxxxx> wrote: >> I suggest using printk_deferred() for this reactor for now. With >> printk_deferred() the message and timestamp are immediately and >> locklessly stored in the buffer, and the printing is performed in a >> separate context. printk_deferred() is safe for all contexts. > > Question: Does it always postpone or only postpone when in a > particular contexts, like, with irqs disabled? printk_deferred() always postpones printing. > Note: do not use this reactor with rq_lock taken, it will lock the > system until printk can handle that. Perhaps you could explain thi comment in your commit message? printk() should never lock the system. John
