From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 D7AA8176ADE; Thu, 26 Dec 2024 23:02:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735254172; cv=none; b=XeAV9eAn12D32NK5kBiF6CNRZwHLarrD/Xaljm8G10RqGDn027sPtnSG9F4VOKddiMm5kxuQcfMhuhSC33EbfeaWzuSW0SrH502/WlXpW+zkcexiZ8AdsJ+S916xuuOqcmNBe62KPiRCko44tsVO7EMqroshTm/sBQcJaB/a0lU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735254172; c=relaxed/simple; bh=jY4tcsq7S/8S27SxlV+QxZwByH5/RBwe0EoUjU8upuQ=; h=Date:To:From:Subject:Message-Id; b=IV/7nCTiXOLk6FWCQg+CNXYI9VDrrH1qJTloMmq8tiaUuWH0Lj9mbhvIvWHvJew5igfRAVth1Ruw0Bio5U47Lju6mhSGxCBx4GBU228L6eWbuPgdul304Cg3a418YZSCEB7FNL6681eziqP4azKNG3CgxbjWcHhO9+iMED8Vvcg= 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=QONyqf9d; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="QONyqf9d" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 511C2C4CED1; Thu, 26 Dec 2024 23:02:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1735254172; bh=jY4tcsq7S/8S27SxlV+QxZwByH5/RBwe0EoUjU8upuQ=; h=Date:To:From:Subject:From; b=QONyqf9dRCbbCqqpU+TYLj1lPkidmS9bbVXgzZtA12UuhlXI8eYaQOpFl2AvtSX8c qPlCMFo7Za/cte8WSxgLs+MjfnEDDCFzUm4SOFx+G+XhRdmMOXUxeVqj7vvY4ecyOA ShVDhNbCioRezSrMAxoX/K8YK+wVUFFmKHdocH8w= Date: Thu, 26 Dec 2024 15:02:51 -0800 To: mm-commits@vger.kernel.org,yuzhao@google.com,stable@vger.kernel.org,quic_zhenhuah@quicinc.com,kent.overstreet@linux.dev,00107082@163.com,surenb@google.com,akpm@linux-foundation.org From: Andrew Morton Subject: + alloc_tag-skip-pgalloc_tag_swap-if-profiling-is-disabled.patch added to mm-hotfixes-unstable branch Message-Id: <20241226230252.511C2C4CED1@smtp.kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: alloc_tag: skip pgalloc_tag_swap if profiling is disabled has been added to the -mm mm-hotfixes-unstable branch. Its filename is alloc_tag-skip-pgalloc_tag_swap-if-profiling-is-disabled.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/alloc_tag-skip-pgalloc_tag_swap-if-profiling-is-disabled.patch This patch will later appear in the mm-hotfixes-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 the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Suren Baghdasaryan Subject: alloc_tag: skip pgalloc_tag_swap if profiling is disabled Date: Thu, 26 Dec 2024 13:16:39 -0800 When memory allocation profiling is disabled, there is no need to swap allocation tags during migration. Skip it to avoid unnecessary overhead. Link: https://lkml.kernel.org/r/20241226211639.1357704-2-surenb@google.com Fixes: e0a955bf7f61 ("mm/codetag: add pgalloc_tag_copy()") Signed-off-by: Suren Baghdasaryan Cc: David Wang <00107082@163.com> Cc: Kent Overstreet Cc: Yu Zhao Cc: Zhenhua Huang Cc: Signed-off-by: Andrew Morton --- lib/alloc_tag.c | 3 +++ 1 file changed, 3 insertions(+) --- a/lib/alloc_tag.c~alloc_tag-skip-pgalloc_tag_swap-if-profiling-is-disabled +++ a/lib/alloc_tag.c @@ -197,6 +197,9 @@ void pgalloc_tag_swap(struct folio *new, union codetag_ref ref_old, ref_new; struct alloc_tag *tag_old, *tag_new; + if (!mem_alloc_profiling_enabled()) + return; + tag_old = pgalloc_tag_get(&old->page); if (!tag_old) return; _ Patches currently in -mm which might be from surenb@google.com are alloc_tag-avoid-current-alloc_tag-manipulations-when-profiling-is-disabled.patch alloc_tag-skip-pgalloc_tag_swap-if-profiling-is-disabled.patch seqlock-add-raw_seqcount_try_begin.patch mm-convert-mm_lock_seq-to-a-proper-seqcount.patch mm-introduce-mmap_lock_speculate_try_beginretry.patch mm-introduce-vma_start_read_locked_nested-helpers.patch mm-move-per-vma-lock-into-vm_area_struct.patch mm-mark-vma-as-detached-until-its-added-into-vma-tree.patch mm-modify-vma_iter_store_gfp-to-indicate-if-its-storing-a-new-vma.patch mm-mark-vmas-detached-upon-exit.patch mm-nommu-fix-the-last-places-where-vma-is-not-locked-before-being-attached.patch types-move-struct-rcuwait-into-typesh.patch mm-allow-vma_start_read_locked-vma_start_read_locked_nested-to-fail.patch mm-move-mmap_init_lock-out-of-the-header-file.patch mm-uninline-the-main-body-of-vma_start_write.patch refcount-introduce-__refcount_addinc_not_zero_limited.patch mm-replace-vm_lock-and-detached-flag-with-a-reference-count.patch mm-debug-print-vm_refcnt-state-when-dumping-the-vma.patch mm-debug-print-vm_refcnt-state-when-dumping-the-vma-fix.patch mm-remove-extra-vma_numab_state_init-call.patch mm-prepare-lock_vma_under_rcu-for-vma-reuse-possibility.patch mm-make-vma-cache-slab_typesafe_by_rcu.patch docs-mm-document-latest-changes-to-vm_lock.patch