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 55A274E433C for ; Wed, 16 Sep 2026 21:55:03 +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=1789595715; cv=none; b=jzaesWWMLI0KDgf2dF74kpbI+5+dC5q9PDJ0sLYdv5u87KNfQtQQVVPW5Gj2kwWa9Azaj2FdcsrYtGMHyGdHvozbF93UY1zjGzLq0NZw7LUAhPD9VexI7Hz4anCOExAHYOraCRvb5Zl0HOgVPsBq+eLjXZVVD2MqBtFP/ph4MzM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789595715; c=relaxed/simple; bh=+G4EMWVWieIJAsMzRH3bNGiliqEbI705gfFS+DrJY3I=; h=Date:To:From:Subject:Message-Id; b=VKzUq3997I33pyJrnbdmjSP/Lpsen2d6qqETFlet0stJRla+Tc7b/qHqoY2IWlv/t4a58gLJFyVhnydzkJv9Khrk/gxc0jT241hxQ25DVr2N1c2RFLD4OyKCwvyiP+Q0G4T1W77VN2/Hx0o2ddHL2E9G0nPYkLtcRo7CVoHB7YI= 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=haxft8Ao; 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="haxft8Ao" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7BD601F00898; Wed, 16 Sep 2026 21:55:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1789595700; bh=BlzRDve6XHVc23ygpSNZwg8AkCOVwxEzyTVg+cnw8yA=; h=Date:To:From:Subject; b=haxft8Ao+WdHG7k292EgRZdao7YFdE8Ex/2fnPeuLkZqo9IyKiwv0isLmIdj+UecS 4CJpKm/kFWX14XPVt0W1aEqg13B2cSmaKh14QsMhYMInXXkR1v+TOOlR++kE7tYTDZ O8Gz8AJd/s3kQ2Pbu5nMhwkC/WH4j+hjB5I4V0QU= Date: Wed, 16 Sep 2026 14:55:00 -0700 To: mm-commits@vger.kernel.org,tz2294@columbia.edu,akpm@linux-foundation.org From: Andrew Morton Subject: + mm-memcontrol-constify-the-zswap-and-socket-pressure-helpers.patch added to mm-new branch Message-Id: <20260916215500.7BD601F00898@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: mm: memcontrol: constify the zswap and socket pressure helpers has been added to the -mm mm-new branch. Its filename is mm-memcontrol-constify-the-zswap-and-socket-pressure-helpers.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-memcontrol-constify-the-zswap-and-socket-pressure-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: memcontrol: constify the zswap and socket pressure helpers Date: Tue, 15 Sep 2026 19:20:15 -0400 mem_cgroup_zswap_writeback_enabled() only reads the zswap_writeback flags, and mem_cgroup_get_socket_pressure() only reads the socket pressure timestamp. Constify them. Link: https://lore.kernel.org/20260915-folio_memcg-const-v3-11-c239a6010b58@columbia.edu Signed-off-by: Tal Zussman Signed-off-by: Andrew Morton Acked-by: Muchun Song Acked-by: Shakeel Butt Acked-by: Lorenzo Stoakes (ARM) Cc: Axel Rasmussen Cc: Baolin Wang Cc: Baoquan He Cc: Barry Song Cc: Chris Li Cc: David Hildenbrand Cc: Johannes Weiner Cc: Kairui Song Cc: Kemeng Shi Cc: Liam R. Howlett Cc: Matthew Wilcox (Oracle) Cc: Michal Hocko Cc: Mike Rapoport Cc: Nhat Pham Cc: Roman Gushchin Cc: Suren Baghdasaryan Cc: Vlastimil Babka Cc: Wei Xu Cc: Yuanchu Xie --- include/linux/memcontrol.h | 8 ++++---- mm/memcontrol.c | 2 +- 2 files changed, 5 insertions(+), 5 deletions(-) --- a/include/linux/memcontrol.h~mm-memcontrol-constify-the-zswap-and-socket-pressure-helpers +++ a/include/linux/memcontrol.h @@ -1684,7 +1684,7 @@ static inline void mem_cgroup_set_socket write_sequnlock_irqrestore(&memcg->socket_pressure_seqlock, flags); } -static inline u64 mem_cgroup_get_socket_pressure(struct mem_cgroup *memcg) +static inline u64 mem_cgroup_get_socket_pressure(const struct mem_cgroup *memcg) { unsigned int seq; u64 val; @@ -1702,7 +1702,7 @@ static inline void mem_cgroup_set_socket WRITE_ONCE(memcg->socket_pressure, jiffies + HZ); } -static inline u64 mem_cgroup_get_socket_pressure(struct mem_cgroup *memcg) +static inline u64 mem_cgroup_get_socket_pressure(const struct mem_cgroup *memcg) { return READ_ONCE(memcg->socket_pressure); } @@ -1937,7 +1937,7 @@ static inline void mem_cgroup_calculate_ bool obj_cgroup_may_zswap(struct obj_cgroup *objcg); void obj_cgroup_charge_zswap(struct obj_cgroup *objcg, size_t size); void obj_cgroup_uncharge_zswap(struct obj_cgroup *objcg, size_t size); -bool mem_cgroup_zswap_writeback_enabled(struct mem_cgroup *memcg); +bool mem_cgroup_zswap_writeback_enabled(const struct mem_cgroup *memcg); #else static inline bool obj_cgroup_may_zswap(struct obj_cgroup *objcg) { @@ -1951,7 +1951,7 @@ static inline void obj_cgroup_uncharge_z size_t size) { } -static inline bool mem_cgroup_zswap_writeback_enabled(struct mem_cgroup *memcg) +static inline bool mem_cgroup_zswap_writeback_enabled(const struct mem_cgroup *memcg) { /* if zswap is disabled, do not block pages going to the swapping device */ return true; --- a/mm/memcontrol.c~mm-memcontrol-constify-the-zswap-and-socket-pressure-helpers +++ a/mm/memcontrol.c @@ -6304,7 +6304,7 @@ void obj_cgroup_uncharge_zswap(struct ob rcu_read_unlock(); } -bool mem_cgroup_zswap_writeback_enabled(struct mem_cgroup *memcg) +bool mem_cgroup_zswap_writeback_enabled(const struct mem_cgroup *memcg) { /* if zswap is disabled, do not block pages going to the swapping device */ if (!zswap_is_enabled()) _ 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 mm-remove-unused-mark_page_reserved.patch mm-remove-unused-totalram_pages_inc-and-totalram_pages_dec.patch mm-remove-pagewriteback.patch mm-swap-add-folio_swap_entry-and-folio_page_swap_entry.patch mm-swap-add-folio_swap_entry-and-folio_page_swap_entry-fix.patch mm-huge_memory-add-a-comment-to-the-open-coded-swap-entry.patch mm-rmap-use-folio_page_swap_entry-in-ttu_anon_swapbacked_folio.patch mm-zswap-use-folio_swap_entry-in-zswap_store_page.patch mm-swapfile-use-folio_page_swap_entry.patch arm64-mte-make-mte_save_tags-and-mte_restore_tags-static.patch arm64-mte-pass-the-swap-entry-to-mte_save_tags.patch mm-swap-remove-page_swap_entry.patch mm-memcontrol-take-a-const-folio-in-folio_memcg-and-friends.patch mm-memcontrol-constify-obj_cgroup_memcg-and-friends.patch mm-memcontrol-constify-the-lruvec-helpers.patch mm-page_io-take-a-const-folio-in-bio_associate_blkg_from_folio.patch mm-memcontrol-constify-the-mem_cgroup-accessors.patch mm-page_counter-constify-page_counter_read-and-page_counter_margin.patch mm-memcontrol-constify-the-reclaim-protection-helpers.patch mm-memcontrol-constify-the-memcg-and-lruvec-stat-readers.patch mm-memcontrol-constify-the-swap-accounting-helpers.patch mm-memcontrol-constify-mem_cgroup_swappiness-and-mem_cgroup_get_max.patch mm-memcontrol-constify-the-zswap-and-socket-pressure-helpers.patch