Re: [PATCH v2] hugetlbfs: Take read_lock on i_mmap for PMD sharing

To: Waiman Long <longman@xxxxxxxxxx>
Subject: Re: [PATCH v2] hugetlbfs: Take read_lock on i_mmap for PMD sharing
From: Davidlohr Bueso <dave@xxxxxxxxxxxx>
Date: Thu, 7 Nov 2019 18:03:37 -0800
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Will Deacon <will.deacon@xxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>
In-reply-to: <20191107211809.9539-1-longman@redhat.com>
Mail-followup-to: Waiman Long <longman@xxxxxxxxxx>, Mike Kravetz <mike.kravetz@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Will Deacon <will.deacon@xxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>
References: <20191107211809.9539-1-longman@redhat.com>
User-agent: NeoMutt/20180716

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

Follow-Ups:
- Re: [PATCH v2] hugetlbfs: Take read_lock on i_mmap for PMD sharing
  - From: Waiman Long

References:
- [PATCH v2] hugetlbfs: Take read_lock on i_mmap for PMD sharing
  - From: Waiman Long