From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1B34CC369A1 for ; Tue, 8 Apr 2025 09:44:41 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id BC4286B000C; Tue, 8 Apr 2025 05:44:38 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id B72946B000D; Tue, 8 Apr 2025 05:44:38 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A61726B000E; Tue, 8 Apr 2025 05:44:38 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 8840D6B000C for ; Tue, 8 Apr 2025 05:44:38 -0400 (EDT) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id C592F1605FF for ; 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charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Queue-Id: 49FF01C0003 X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: m1765funymgd1845zz6xqk8utz8z1iky X-HE-Tag: 1744105478-791856 X-HE-Meta: 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Apr 04, 2025 at 09:16:10PM +0200, David Hildenbrand wrote: > On 04.04.25 16:06, Pankaj Raghav (Samsung) wrote: > > From: Pankaj Raghav > > > > THP support for non-tmpfs filesystem has been around for some time now. > > Update the admin guide to reflect it. > > > > While we are at it, move FilePmdMapped to previous paragraph for clarity, > > and clarify ShmemPmdMapped & ShmemHugePage. > > > > Signed-off-by: Pankaj Raghav > > Acked-by: David Hildenbrand > > --- > > BTW, we should go over the whole document and bring it up to date. > Interestingly, it starts with > > "Performance critical computing applications dealing with large memory > working sets are already running on top of libhugetlbfs and in turn > hugetlbfs. Transparent HugePage Support (THP) is an alternative mean of > using huge pages for the backing of virtual memory with huge pages > that supports the automatic promotion and demotion of page sizes and > without the shortcomings of hugetlbfs. > > Currently THP only works for anonymous memory mappings and tmpfs/shmem. > But in the future it can expand to other filesystems." As a part of this patch, I do change 2nd paragraph: -Currently THP only works for anonymous memory mappings and tmpfs/shmem. -But in the future it can expand to other filesystems. +Currently, THP only works for anonymous memory mappings, tmpfs/shmem and +filesystems that support large folios. Do we need to add more changes to the first paragraph as well? -- Pankaj