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 D4D0336B912 for ; Sat, 29 Aug 2026 20:38:44 +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=1788035926; cv=none; b=cX1PHfWibqscjvkq1neIipWlH00trHzGWUknSWzUd5efr7vHyh/w1rj2wBGoj/VmkcKPRkA/Mi1CRbL+emyVo1AUQUHT//412qAK6u0C9+mRPG0cSAFoRQ3i4v3MYa3peLxbvmdlvtWGHYiEQMfVzEHzgYnJ1Rg2qjvKpgKcQm0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788035926; c=relaxed/simple; bh=ZRwMGyrULcgrbZPHU9XIQOiRfKk6pzdkwmzklPsGBJY=; h=Date:To:From:Subject:Message-Id; b=YlRJvzOdW0V5lKiOX3YttqPMOToQLUyKwdYHy5qD9ylXINO3JwH2ZaQE33dDEh9cHuk/AAVnxxHrJuVcOMazOUvvk2BF91rU14Kk2dLlpUdI1RUUZcl7Eri1ZjOSjfExgUsIrOp4mlW2p53Tt/UzM1JA2k9T5W8LA+1JU/5wU3E= 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=aHkYfT0j; 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="aHkYfT0j" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 83AF91F000E9; Sat, 29 Aug 2026 20:38:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1788035924; bh=fc25lfUDm8SpSrRB/ivh0dj9ZYxJLFbcLGAzlCKzUes=; h=Date:To:From:Subject; b=aHkYfT0jYxk541Cs140o8pwHxmt6EuKS0XN+YubA5Q2Op0UV09+xZPXGfhJBtry3K qRkoUk5089jKu3UdC/meHGjU3D7e5PEaCIQfNAq5T852yT3Zwp0bRB71csAoRPulAv LljrQog2i2CeUJJ/UocyPL0Ft1uCcUek47AIWKzo= Date: Sat, 29 Aug 2026 13:38:44 -0700 To: mm-commits@vger.kernel.org,willy@infradead.org,ljs@kernel.org,hannes@cmpxchg.org,tz2294@columbia.edu,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-page_io-use-swap-entries-directly-in-zeromap-helpers.patch added to mm-new branch Message-Id: <20260829203844.83AF91F000E9@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm/page_io: use swap entries directly in zeromap helpers has been added to the -mm mm-new branch. Its filename is mm-page_io-use-swap-entries-directly-in-zeromap-helpers.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-page_io-use-swap-entries-directly-in-zeromap-helpers.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: Tal Zussman Subject: mm/page_io: use swap entries directly in zeromap helpers Date: Sat, 29 Aug 2026 15:09:02 -0400 Increment swp_entry_t::val directly instead of recomputing each entry with page_swap_entry(). This removes the last struct page usage in page_io.c and saves one call to compound_head() per page. Link: https://lore.kernel.org/20260829-b4-page_io-folios-v2-3-649728091117@columbia.edu Signed-off-by: Tal Zussman Acked-by: Johannes Weiner Reviewed-by: Matthew Wilcox (Oracle) Reviewed-by: Lorenzo Stoakes (ARM) Signed-off-by: Andrew Morton --- mm/page_io.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/mm/page_io.c~mm-page_io-use-swap-entries-directly-in-zeromap-helpers +++ a/mm/page_io.c @@ -160,7 +160,7 @@ static void swap_zeromap_folio_set(struc struct obj_cgroup *objcg = get_obj_cgroup_from_folio(folio); int nr_pages = folio_nr_pages(folio); struct swap_cluster_info *ci; - swp_entry_t entry; + swp_entry_t entry = folio->swap; unsigned int i; VM_WARN_ON_ONCE_FOLIO(!folio_test_swapcache(folio), folio); @@ -168,8 +168,8 @@ static void swap_zeromap_folio_set(struc ci = swap_cluster_get_and_lock(folio); for (i = 0; i < folio_nr_pages(folio); i++) { - entry = page_swap_entry(folio_page(folio, i)); __swap_table_set_zero(ci, swp_cluster_offset(entry)); + entry.val++; } swap_cluster_unlock(ci); @@ -183,7 +183,7 @@ static void swap_zeromap_folio_set(struc static void swap_zeromap_folio_clear(struct folio *folio) { struct swap_cluster_info *ci; - swp_entry_t entry; + swp_entry_t entry = folio->swap; unsigned int i; VM_WARN_ON_ONCE_FOLIO(!folio_test_swapcache(folio), folio); @@ -191,8 +191,8 @@ static void swap_zeromap_folio_clear(str ci = swap_cluster_get_and_lock(folio); for (i = 0; i < folio_nr_pages(folio); i++) { - entry = page_swap_entry(folio_page(folio, i)); __swap_table_clear_zero(ci, swp_cluster_offset(entry)); + entry.val++; } swap_cluster_unlock(ci); } _ Patches currently in -mm which might be from tz2294@columbia.edu are mm-page_io-convert-write-completion-handlers-to-folios.patch mm-remove-pagereclaim.patch mm-page_io-use-swap-entries-directly-in-zeromap-helpers.patch mm-page_io-rename-bio_associate_blkg_from_page.patch mm-page_io-refer-to-folios-in-swap_writeout-comments.patch mm-swap-rename-__swap_writepage-to-__swap_writeout.patch