linux-kernel - Re: [PATCH v4] mm/hugetlb: Fix unsigned overflow in __nr_hugepages_store

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Message-ID: <9a23edc9-b2e5-839e-30d6-0723cb98246d@oracle.com>
Date:   Tue, 5 Mar 2019 13:35:32 -0800
From:   Mike Kravetz <mike.kravetz@...cle.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
        Oscar Salvador <osalvador@...e.de>,
        David Rientjes <rientjes@...gle.com>,
        Jing Xiangfeng <jingxiangfeng@...wei.com>,
        "mhocko@...nel.org" <mhocko@...nel.org>,
        "hughd@...gle.com" <hughd@...gle.com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        Andrea Arcangeli <aarcange@...hat.com>,
        "kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
        linux-kernel@...r.kernel.org, Alexandre Ghiti <alex@...ti.fr>
Subject: Re: [PATCH v4] mm/hugetlb: Fix unsigned overflow in
 __nr_hugepages_store_common()

On 3/5/19 1:16 PM, Andrew Morton wrote:
> On Mon, 4 Mar 2019 20:15:40 -0800 Mike Kravetz <mike.kravetz@...cle.com> wrote:
> 
>> Andrew, this is on top of Alexandre Ghiti's "hugetlb: allow to free gigantic
>> pages regardless of the configuration" patch.  Both patches modify
>> __nr_hugepages_store_common().  Alex's patch is going to change slightly
>> in this area.
> 
> OK, thanks, I missed that.  Are the changes significant?
> 

No, changes should be minor.  IIRC, just checking for a condition in an
error path.

-- 
Mike Kravetz