linux-kernel - Re: [PATCH v2] mm/hugetlb: Fix a race between hugetlb sysctl handlers

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Date:   Fri, 28 Aug 2020 13:30:33 -0700
From:   Andi Kleen <ak@...ux.intel.com>
To:     Mike Kravetz <mike.kravetz@...cle.com>
Cc:     Muchun Song <songmuchun@...edance.com>, akpm@...ux-foundation.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mm/hugetlb: Fix a race between hugetlb sysctl handlers

On Fri, Aug 28, 2020 at 10:14:16AM -0700, Mike Kravetz wrote:
> On 8/28/20 7:59 AM, Andi Kleen wrote:
> >> Fixes: e5ff215941d5 ("hugetlb: multiple hstates for multiple page sizes")
> > 
> > I believe the Fixes line is still not correct. The original patch
> > didn't have that problem. Please identify which patch added
> > the problematic code.
> 
> Hi Andi,
> 
> I agree with Muchun's assessment that the issue was caused by e5ff215941d5.
> Why?

Yes when checking the code again I agree. It was introduced with that
patch. Patches look ok to me now.

-Andi