linux-kernel - Re: [RFC][PATCH] Add __GFP_ZERO to alloc_cpumask_var

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Message-ID: <87bna3rph4.fsf@rustcorp.com.au>
Date:	Mon, 07 Dec 2015 12:26:23 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
	Xunlei Pang <xlpang@...hat.com>
Subject: Re: [RFC][PATCH] Add __GFP_ZERO to alloc_cpumask_var_node() if ptr is zero

Ingo Molnar <mingo@...nel.org> writes:
> * Rusty Russell <rusty@...tcorp.com.au> wrote:
>> I don't think there are great answers here.  But adding more subtle zeroing 
>> semantics feels wrong, even if it will mostly Just Work.
>
> It's not subtle if the naming clearly reflects it (hence my suggestion to rename 
> the API) - and the status quo for on-stack allocations is zeroing anyway, so it's 
> not a big jump...

True, but we already have zalloc_cpumask_var() though if we want that?

It probably makes sense to just switch everyone to that and get rid of
the non-z one?

Cheers,
Rusty.
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