Calling printk with locks held

Mulyadi Santosa mulyadi.santosa at
Thu Jun 2 18:45:00 EDT 2011


On Fri, Jun 3, 2011 at 03:43, Neil Baylis <neil.baylis at> wrote:
> I've just been told that it's not OK to call printk while holding a lock.

perhaps that is lock related to terminal?

> This came as a surprise to me, as I've written thousands of lines of code
> that calls printk while holding multiple locks, and have not seen any
> problem. The only explanation I was given was that it can deadlock.
> Is this correct? I thought there were very few places where it was not safe
> to call printk.
> Neil Baylis
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Mulyadi Santosa
Freelance Linux trainer and consultant


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