linux-kernel - Re: [PATCH] sched/core: Clear the root_domain cpumasks in init

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Message-ID: <565EEE3E.30301@redhat.com>
Date:	Wed, 2 Dec 2015 21:12:30 +0800
From:	Xunlei Pang <xlpang@...hat.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH] sched/core: Clear the root_domain cpumasks in
 init_rootdomain()

Hi Peter,

On 12/02/2015 at 08:34 PM, Peter Zijlstra wrote:
> On Wed, Dec 02, 2015 at 07:52:59PM +0800, Xunlei Pang wrote:
>> The patch cleans the garbage by using zalloc_cpumask_var()
>> instead of alloc_cpumask_var() for root_domain::rto_mask
>> allocation, thereby addressing the issues.
> How did you notice this? Also do we want to do the same for the kmalloc

When doing review.

> in alloc_rootdomain() ?

There is a "memset(rd, 0, sizeof(*rd))" in init_rootdomain(),
so I don't think we need to do this in alloc_rootdomain().

Regards,
Xunlei
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