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Date: Wed, 23 Mar 2022 21:47:58 -0400 From: "Theodore Ts'o" <tytso@....edu> To: Yang Shi <shy828301@...il.com> Cc: vbabka@...e.cz, kirill.shutemov@...ux.intel.com, linmiaohe@...wei.com, songliubraving@...com, riel@...riel.com, willy@...radead.org, ziy@...dia.com, akpm@...ux-foundation.org, adilger.kernel@...ger.ca, darrick.wong@...cle.com, linux-mm@...ck.org, linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [v2 PATCH 0/8] Make khugepaged collapse readonly FS THP more consistent 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()? - Ted
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