Re: can kfree sleep?

[Manfred Spraul]

Hi Peter,

> Just a question: can kfree sleep?
>
>
>  
No, it never sleeps. It's safe to call kfree from arbitrary context. The 
only exception is the NMI oopser and similar arch code.

> I believe so, but slab.c does not enlighten me immediately:
>  
Yes, the kfree code is quite long - it must check if freeing one object 
created a freeable page and return it to the page allocator. Together 
with lots of caching and debug checks.

--
   Manfred

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