linux-kernel - Re: How to check whether executing in atomic context?

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Message-ID: <4AD6235B.8090905@s5r6.in-berlin.de>
Date:	Wed, 14 Oct 2009 21:15:39 +0200
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	"Leonidas ." <leonidas137@...il.com>
CC:	Gleb Natapov <gleb@...hat.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: How to check whether executing in atomic context?

Leonidas . wrote:
> On Wed, Oct 14, 2009 at 11:09 PM, Stefan Richter
> <stefanr@...6.in-berlin.de> wrote:
>> let the caller of your routine tell it whether it's atomic context
>> or not.
[...]
> What makes it more complicated is this, the user might achieve the
> functionality via instrumenting his source code, i.e. something like
> using -finstrument flag of gcc. As per above inferences about
> in_atomic(), in case of instrumentation there is no choice other than
> providing all apis as atomic apis, this might not be the right thing
> to do under all circumstances. Especially, for my code since I do lot
> of allocations for book keeping.
> 
> I am not aware of any Linux kernel module which can comply to this
> kind of use case, what would be the most optimal thing to do here?

And preallocation is not feasible either?
-- 
Stefan Richter
-=====-==--= =-=- -===-
http://arcgraph.de/sr/
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