From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E17C282866 for ; Wed, 2 Sep 2026 03:00:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788318005; cv=none; b=Smt72DQKYgvhrXf/Tgvnjerk12zINK84PCCn93Gb51gpRKOprLCnjZ9naOtswrm4iuvjIPKZgLAHYR7FppcJ18w7yH3g96Rmeo0qwqzWaOZk1gSQ2MGFAtl85g1AXmD11P+fQIP6KDIBd+C6BtUTvuoyZ04IOaYdlOHOEoy0MTk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788318005; c=relaxed/simple; bh=y0ZXKJ8w2UVrDYbb2nSd/u5Kl35Uit37TxPgs203OcU=; h=Date:To:From:Subject:Message-Id; b=JLBe2WftBy/65RTsO8uUtMMUscwCrkCgge49x+7vh0E5UcmmZS8nFahFtASXGncCSbAZ2yHjIy5n8AGBzqKhthUqNBjo4eCID4EJRuceNikL6CZ7NFJGZc+jAvRgxI2Zr7wvo1pR6tntIQ2TrixWm+FWqonhHmOOq2qupjhnPt4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=XAQRlyFP; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="XAQRlyFP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 09EEA1F000E9; Wed, 2 Sep 2026 03:00:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1788318003; bh=by4qZSXczR79U0j0hdTDmCYZebgQoh+OnIoPHsiaynU=; h=Date:To:From:Subject; b=XAQRlyFP8i0F2kLeVEgSRjeeA/cIGLK3aAEEzVk5dZBicO6IUQb/L5txJ8zYfb+dM AiVLwobd9BhP+fnU/3smt7WmABiVB7sFHUhkALUbOenQ5J1/ChCHh5xKfCBVadn9a9 B5H7eV5HXxe9rHXiSkprgN0Y3oJfE5ciR5kYz89A= Date: Tue, 01 Sep 2026 20:00:02 -0700 To: mm-commits@vger.kernel.org,yuanchu@google.com,xueyuan.chen21@gmail.com,weixugc@google.com,stevensd@chromium.org,shakeel.butt@linux.dev,ridong.chen@linux.dev,mhocko@kernel.org,ljs@kernel.org,lianux.mm@gmail.com,kunwu.chan@gmail.com,kasong@tencent.com,hannes@cmpxchg.org,david@kernel.org,baoquan.he@linux.dev,baolin.wang@linux.alibaba.com,axelrasmussen@google.com,baohua@kernel.org,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-mglru-make-lru-folio-prefetch-helper-an-inline-function.patch added to mm-new branch Message-Id: <20260902030003.09EEA1F000E9@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm/mglru: make LRU folio prefetch helper an inline function has been added to the -mm mm-new branch. Its filename is mm-mglru-make-lru-folio-prefetch-helper-an-inline-function.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-mglru-make-lru-folio-prefetch-helper-an-inline-function.patch This patch will later appear in the mm-new branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Note, mm-new is a provisional staging ground for work-in-progress patches, and acceptance into mm-new is a notification for others take notice and to finish up reviews. Please do not hesitate to respond to review feedback and post updated versions to replace or incrementally fixup patches in mm-new. The mm-new branch of mm.git is not included in linux-next If a few days of testing in mm-new is successful, the patch will me moved into mm.git's mm-unstable branch, which is included in linux-next Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via various branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there most days ------------------------------------------------------ From: "Barry Song (Xiaomi)" Subject: mm/mglru: make LRU folio prefetch helper an inline function Date: Wed, 2 Sep 2026 07:24:19 +0800 `prefetchw_prev_lru_folio()` is currently implemented as a macro with a potentially unused argument. This makes the helper harder to read and can also trigger checkpatch warnings about unused macro arguments. Make it a `static inline` function and remove the unnecessary `_field` argument. The helper always prefetches the previous folio's `flags`, so there is no need to make the field configurable. Link: https://lore.kernel.org/20260901232421.40157-6-baohua@kernel.org Signed-off-by: Barry Song (Xiaomi) Tested-by: Xueyuan Chen Reviewed-by: Lian Wang Cc: Axel Rasmussen Cc: Baolin Wang Cc: Baoquan He Cc: David Hildenbrand Cc: David Stevens Cc: Johannes Weiner Cc: Kairui Song Cc: Kunwu Chan Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Ridong Chen Cc: Shakeel Butt Cc: Wei Xu Cc: Yuanchu Xie Signed-off-by: Andrew Morton --- mm/vmscan.c | 26 +++++++++++++++----------- 1 file changed, 15 insertions(+), 11 deletions(-) --- a/mm/vmscan.c~mm-mglru-make-lru-folio-prefetch-helper-an-inline-function +++ a/mm/vmscan.c @@ -182,17 +182,21 @@ struct scan_control { }; #ifdef ARCH_HAS_PREFETCHW -#define prefetchw_prev_lru_folio(_folio, _base, _field) \ - do { \ - if ((_folio)->lru.prev != _base) { \ - struct folio *prev; \ - \ - prev = lru_to_folio(&(_folio->lru)); \ - prefetchw(&prev->_field); \ - } \ - } while (0) +static inline void prefetchw_prev_lru_folio(struct folio *folio, + struct list_head *base) +{ + if (folio->lru.prev != base) { + struct folio *prev; + + prev = lru_to_folio(&folio->lru); + prefetchw(&prev->flags); + } +} #else -#define prefetchw_prev_lru_folio(_folio, _base, _field) do { } while (0) +static inline void prefetchw_prev_lru_folio(struct folio *folio, + struct list_head *base) +{ +} #endif /* @@ -1700,7 +1704,7 @@ static unsigned long isolate_lru_folios( struct folio *folio; folio = lru_to_folio(src); - prefetchw_prev_lru_folio(folio, src, flags); + prefetchw_prev_lru_folio(folio, src); nr_pages = folio_nr_pages(folio); total_scan += nr_pages; _ Patches currently in -mm which might be from baohua@kernel.org are mm-mglru-make-retry-logic-explicit-in-isolate_folios.patch mm-vmscan-avoid-pointless-large-folio-splits-without-swap.patch mm-mglru-separate-folio-generation-update-from-lru-accounting.patch mm-mglru-batch-update-lrugen-nr_pages-in-inc_min_seq.patch mm-mglru-enhance-cold-hot-inversion-handling-in-inc_min_seq.patch mm-mglru-exclude-folios-promoted-by-aging-from-protected-in-inc_min_seq.patch mm-mglru-make-lru-folio-prefetch-helper-an-inline-function.patch mm-mglru-move-folios-from-oldest-gen-to-second-oldest-gen-from-head-to-tail.patch mm-mglru-batch-move-folios-to-the-second-oldest-gens-lru.patch