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Date: Wed, 23 Mar 2022 19:46:59 -0700 From: Yang Shi <shy828301@...il.com> To: "Theodore Ts'o" <tytso@....edu> Cc: Vlastimil Babka <vbabka@...e.cz>, "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>, Miaohe Lin <linmiaohe@...wei.com>, Song Liu <songliubraving@...com>, Rik van Riel <riel@...riel.com>, Matthew Wilcox <willy@...radead.org>, Zi Yan <ziy@...dia.com>, Andrew Morton <akpm@...ux-foundation.org>, Andreas Dilger <adilger.kernel@...ger.ca>, darrick.wong@...cle.com, Linux MM <linux-mm@...ck.org>, Linux FS-devel Mailing List <linux-fsdevel@...r.kernel.org>, linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [v2 PATCH 0/8] Make khugepaged collapse readonly FS THP more consistent On Wed, Mar 23, 2022 at 6:48 PM Theodore Ts'o <tytso@....edu> wrote: > > On Thu, Mar 17, 2022 at 04:48:19PM -0700, Yang Shi wrote: > > > > The patch 1 ~ 7 are minor bug fixes, clean up and preparation patches. > > The patch 8 converts ext4 and xfs. We may need convert more filesystems, > > but I'd like to hear some comments before doing that. > > Adding a hard-coded call to khugepage_enter_file() in ext4 and xfs, > and potentially, each file system, seems kludgy as all heck. Is there > any reason not to simply call it in the mm code which calls f_op->mmap()? Thanks, Ted. Very good point. I just didn't think of it. I think it is doable. We may be able to clean up the code further. > > - Ted
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