linux-kernel - Re: [RFC V2 05/12] cpuset: Add cpuset_inc() inside cpuset

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Date:   Mon, 30 Jan 2017 09:36:20 -0800
From:   Dave Hansen <dave.hansen@...el.com>
To:     Anshuman Khandual <khandual@...ux.vnet.ibm.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Cc:     mhocko@...e.com, vbabka@...e.cz, mgorman@...e.de,
        minchan@...nel.org, aneesh.kumar@...ux.vnet.ibm.com,
        bsingharora@...il.com, srikar@...ux.vnet.ibm.com,
        haren@...ux.vnet.ibm.com, jglisse@...hat.com,
        dan.j.williams@...el.com
Subject: Re: [RFC V2 05/12] cpuset: Add cpuset_inc() inside cpuset_init()

On 01/29/2017 07:35 PM, Anshuman Khandual wrote:
> Currently cpusets_enabled() wrongfully returns 0 even if we have a root
> cpuset configured on the system. This got missed when jump level was
> introduced in place of number_of_cpusets with the commit 664eeddeef65
> ("mm: page_alloc: use jump labels to avoid checking number_of_cpusets")
> . This fixes the problem so that cpusets_enabled() returns positive even
> for the root cpuset.
> 
> Fixes: 664eeddeef65 ("mm: page_alloc: use jump labels to avoid")
> Signed-off-by: Anshuman Khandual <khandual@...ux.vnet.ibm.com>

This needs to go upstream separately, right?