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 E61DB3B9DAC for ; Fri, 21 Aug 2026 22:43:47 +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=1787352229; cv=none; b=cc7p6kAJCCtlb5SuXIW1bDVkEkztYmRcWXp/YQrieFjBpXXaHesJj7pQvFlhMHfGrcy/SyNI5AQ5e6VgQC+BTPnNpcJx9pZ9i76ooLWD+5iQlq9PGSj4pOi956/uVsQi70cyGYKkupk4DzAyolfP+lxCPlpaQQPA3OBUkq7JflE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787352229; c=relaxed/simple; bh=4lCpKl2U2tJtL60XDT4Q3i8vpOyQfy4/MGjjzb8lTvk=; h=Date:To:From:Subject:Message-Id; b=pXDkntwrssFcHR4cnl+pcZjfBc/aUW3zPisu79DKTQxKSkwti7G3a1ipJ20gbzOwnT0p59W8Eei8EIvF15jxmYZOQKeF+EqEVY3Iwgs7f2QPv105XYwNFt3rHb8CJUzBOunQlvGfHfUE/Q6RpnJVyzN0gxxvxkh5pm2Bzu37wyU= 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=SDf1hXFQ; 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="SDf1hXFQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 52E5D1F00A3A; Fri, 21 Aug 2026 22:43:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1787352227; bh=3ia0LRWhjMyE3Vng8h2cWwKLxQmoGFwa9zfEM1afw68=; h=Date:To:From:Subject; b=SDf1hXFQoqvWQh5NIu+RtdnoCzuU+pQHFc6Lsm4SxgT4in8FO9zw6vP+Z/0qC1XBt SCiwJHVTzOz1fJuEDwb1UvFGd2UOOR2L2Y3y6O8YkYl5pWnKLVKK70L4h3UYCWy/B+ MgCA152MfAzZd6rWozYVpM1cRhbTwOJW6qK2f1ys= Date: Fri, 21 Aug 2026 15:43:46 -0700 To: mm-commits@vger.kernel.org,liam@infradead.org,akpm@linux-foundation.org From: Andrew Morton Subject: + maple_tree-use-prefetched-value-in-mas_wr_store_type.patch added to mm-unstable branch Message-Id: <20260821224347.52E5D1F00A3A@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: maple_tree: use prefetched value in mas_wr_store_type() has been added to the -mm mm-unstable branch. Its filename is maple_tree-use-prefetched-value-in-mas_wr_store_type.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/maple_tree-use-prefetched-value-in-mas_wr_store_type.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm 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: "Liam R. Howlett (Oracle)" Subject: maple_tree: use prefetched value in mas_wr_store_type() Date: Fri, 21 Aug 2026 15:26:16 -0400 The slot contents exist in wr_mas->content, which has less overhead than reading the slot again. Link: https://lore.kernel.org/20260821192627.4085470-9-liam@infradead.org Signed-off-by: Liam R. Howlett (Oracle) Cc: Boqun Feng Cc: Breno Leitao Cc: Chris Mason Cc: Chuck Lever Cc: Ingo Molnar Cc: Jason Gunthorpe Cc: Joe Perches Cc: Peter Zijlstra Cc: Rik van Riel Cc: Waiman Long Cc: Will Deacon Signed-off-by: Andrew Morton --- lib/maple_tree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/lib/maple_tree.c~maple_tree-use-prefetched-value-in-mas_wr_store_type +++ a/lib/maple_tree.c @@ -3280,7 +3280,7 @@ static inline void mas_wr_slot_store(str void __rcu **slots = wr_mas->slots; bool gap = false; - gap |= !mt_slot_locked(mas->tree, slots, offset); + gap |= !wr_mas->content; gap |= !mt_slot_locked(mas->tree, slots, offset + 1); if (wr_mas->offset_end - offset == 1) { _ Patches currently in -mm which might be from liam@infradead.org are maple_tree-add-rcu-locking-check-when-lockdep-is-enabled.patch locking-lockdep-add-sequence-counter-to-held_lock.patch maple_tree-add-write-lock-checking-with-lockdep-sequence-numbers.patch maple_tree-documentation-fix.patch maple_tree-drop-dead-code-from-mas_extend_spanning_null.patch maple_tree-drop-maple_alloc_slots.patch maple_tree-clarify-comments-on-mas_nomem.patch maple_tree-use-prefetched-value-in-mas_wr_store_type.patch maple_tree-optimise-mas_wr_node_store-when-not-in-rcu-mode.patch maple_tree-micro-optimisation-of-mas_wr_store_type.patch maple_tree-add-bulk-parent-set-helper.patch maple_tree-catch-race-in-mas_alloc_cyclic.patch maple_tree-document-that-erase-may-use-gfp_kernel-for-allocations.patch maple_tree-avoid-mas_erase-and-mtree_erase-failures.patch maple_tree-document-erase-and-allocations-better.patch maple_tree-change-two-gfp-flags-in-tests.patch maple_tree-fix-argument-name-in-header.patch maple_tree-avoid-extra-gap-calculation.patch maple_tree-add-helper-mas_make_walkable.patch