Re: [PATCH] mm: khugepaged: skip huge page collapse for special files

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To: Yang Shi <shy828301@xxxxxxxxx>
Subject: Re: [PATCH] mm: khugepaged: skip huge page collapse for special files
From: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Date: Wed, 27 Oct 2021 22:37:01 +0100
Cc: Hugh Dickins <hughd@xxxxxxxxxx>, Hao Sun <sunhao.th@xxxxxxxxx>, "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>, Song Liu <songliubraving@xxxxxx>, Andrea Righi <andrea.righi@xxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Linux MM <linux-mm@xxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, stable <stable@xxxxxxxxxxxxxxx>
In-reply-to: <CAHbLzkrV1SuqZ8750yD6ZDM9D9uc8svrJ_gARrESq0kMspg+uw@mail.gmail.com>
References: <20211027195221.3825-1-shy828301@gmail.com> <YXm7kHy8uTN1+RRc@casper.infradead.org> <CAHbLzkrV1SuqZ8750yD6ZDM9D9uc8svrJ_gARrESq0kMspg+uw@mail.gmail.com>

On Wed, Oct 27, 2021 at 02:32:02PM -0700, Yang Shi wrote:
> > This doesn't make sense to me.  if vma->vm_file, we already returned,
> > so this is dead code.
> 
> Yes, Song mentioned the same thing. Fixed by an incremental patch.

I saw that after I sent this.  My email sometimes arrives slowly.

References:
- [PATCH] mm: khugepaged: skip huge page collapse for special files
  - From: Yang Shi
- Re: [PATCH] mm: khugepaged: skip huge page collapse for special files
  - From: Matthew Wilcox
- Re: [PATCH] mm: khugepaged: skip huge page collapse for special files
  - From: Yang Shi

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