linux-kernel - Re: [PATCH v2] hugetlbfs: Take read_lock on i

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Message-ID: <20191108020337.pyf3ry3zsioh2ghz@linux-p48b>
Date:   Thu, 7 Nov 2019 18:03:37 -0800
From:   Davidlohr Bueso <dave@...olabs.net>
To:     Waiman Long <longman@...hat.com>
Cc:     Mike Kravetz <mike.kravetz@...cle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Will Deacon <will.deacon@....com>,
        Matthew Wilcox <willy@...radead.org>
Subject: Re: [PATCH v2] hugetlbfs: Take read_lock on i_mmap for PMD sharing

On Thu, 07 Nov 2019, Waiman Long wrote:
>With this patch applied, the customer is seeing significant performance
>improvement over the unpatched kernel.

Could you give more details here?

Thanks,
Davidlohr