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Date: Sun, 21 Nov 2004 19:56:41 +0100
From: Manfred Spraul <manfred@colorfullife.com>
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To: "Peter T. Breuer" <ptb@it.uc3m.es>
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Subject: Re: can kfree sleep?
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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