From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3B908C61DA4 for ; Mon, 13 Mar 2023 18:07:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230141AbjCMSHf (ORCPT ); Mon, 13 Mar 2023 14:07:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44142 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230305AbjCMSHd (ORCPT ); Mon, 13 Mar 2023 14:07:33 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 411CD5A1A3 for ; Mon, 13 Mar 2023 11:07:28 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 9257A6102A for ; Mon, 13 Mar 2023 18:07:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EC159C433D2; Mon, 13 Mar 2023 18:07:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1678730847; bh=pYvJKf/O+OY5KSuSW7g3l2LyugYJVi4bCljvy7lTde8=; h=Date:To:From:Subject:From; b=NmqGu99y/JPAYLAjvJkRZ9OeCGby4LCD9Cz5VP5zpBO0Ok9AqE5gWA0wclUzHy1s+ SPshldY5Kcp5HUiBEutLS8qNQR0zWw2jt7skPlPe779UGZyUOyaRrLyJdLjkRYDM+r fGdVjEKNe/8NnzR/Uvt0EjP5XZpf3aqPnAPuhgC8= Date: Mon, 13 Mar 2023 11:07:26 -0700 To: mm-commits@vger.kernel.org, willy@infradead.org, vbabka@suse.cz, thomas.hellstrom@linux.intel.com, peterx@redhat.com, mhocko@suse.com, lstoakes@gmail.com, linux@armlinux.org.uk, kirill.shutemov@linux.intel.com, jgg@ziepe.ca, hca@linux.ibm.com, frederic@kernel.org, dan.j.williams@intel.com, cl@linux.com, christian.koenig@amd.com, chenhuacai@kernel.org, atomlin@atomlin.com, mtosatti@redhat.com, akpm@linux-foundation.org From: Andrew Morton Subject: + this_cpu_cmpxchg-loongarch-switch-this_cpu_cmpxchg-to-locked-add-_local-function.patch added to mm-unstable branch Message-Id: <20230313180726.EC159C433D2@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The patch titled Subject: this_cpu_cmpxchg: loongarch: switch this_cpu_cmpxchg to locked, add _local function has been added to the -mm mm-unstable branch. Its filename is this_cpu_cmpxchg-loongarch-switch-this_cpu_cmpxchg-to-locked-add-_local-function.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/this_cpu_cmpxchg-loongarch-switch-this_cpu_cmpxchg-to-locked-add-_local-function.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 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: Marcelo Tosatti Subject: this_cpu_cmpxchg: loongarch: switch this_cpu_cmpxchg to locked, add _local function Date: Mon, 13 Mar 2023 13:25:09 -0300 Goal is to have vmstat_shepherd to transfer from per-CPU counters to global counters remotely. For this, an atomic this_cpu_cmpxchg is necessary. Following the kernel convention for cmpxchg/cmpxchg_local, add this_cpu_cmpxchg_local helpers to Loongarch. Link: https://lkml.kernel.org/r/20230313162634.309252817@redhat.com Signed-off-by: Marcelo Tosatti Cc: Aaron Tomlin Cc: Christian König Cc: Christoph Lameter Cc: Dan Williams Cc: Frederic Weisbecker Cc: Heiko Carstens Cc: Huacai Chen Cc: Jason Gunthorpe Cc: Kirill A. Shutemov Cc: Lorenzo Stoakes Cc: Matthew Wilcox (Oracle) Cc: Michal Hocko Cc: Peter Xu Cc: "Russell King (Oracle)" Cc: Thomas Hellström Cc: Vlastimil Babka Signed-off-by: Andrew Morton --- --- a/arch/loongarch/include/asm/percpu.h~this_cpu_cmpxchg-loongarch-switch-this_cpu_cmpxchg-to-locked-add-_local-function +++ a/arch/loongarch/include/asm/percpu.h @@ -150,6 +150,16 @@ static inline unsigned long __percpu_xch } /* this_cpu_cmpxchg */ +#define _protect_cmpxchg(pcp, o, n) \ +({ \ + typeof(*raw_cpu_ptr(&(pcp))) __ret; \ + preempt_disable_notrace(); \ + __ret = cmpxchg(raw_cpu_ptr(&(pcp)), o, n); \ + preempt_enable_notrace(); \ + __ret; \ +}) + +/* this_cpu_cmpxchg_local */ #define _protect_cmpxchg_local(pcp, o, n) \ ({ \ typeof(*raw_cpu_ptr(&(pcp))) __ret; \ @@ -222,10 +232,15 @@ do { \ #define this_cpu_xchg_4(pcp, val) _percpu_xchg(pcp, val) #define this_cpu_xchg_8(pcp, val) _percpu_xchg(pcp, val) -#define this_cpu_cmpxchg_1(ptr, o, n) _protect_cmpxchg_local(ptr, o, n) -#define this_cpu_cmpxchg_2(ptr, o, n) _protect_cmpxchg_local(ptr, o, n) -#define this_cpu_cmpxchg_4(ptr, o, n) _protect_cmpxchg_local(ptr, o, n) -#define this_cpu_cmpxchg_8(ptr, o, n) _protect_cmpxchg_local(ptr, o, n) +#define this_cpu_cmpxchg_local_1(ptr, o, n) _protect_cmpxchg_local(ptr, o, n) +#define this_cpu_cmpxchg_local_2(ptr, o, n) _protect_cmpxchg_local(ptr, o, n) +#define this_cpu_cmpxchg_local_4(ptr, o, n) _protect_cmpxchg_local(ptr, o, n) +#define this_cpu_cmpxchg_local_8(ptr, o, n) _protect_cmpxchg_local(ptr, o, n) + +#define this_cpu_cmpxchg_1(ptr, o, n) _protect_cmpxchg(ptr, o, n) +#define this_cpu_cmpxchg_2(ptr, o, n) _protect_cmpxchg(ptr, o, n) +#define this_cpu_cmpxchg_4(ptr, o, n) _protect_cmpxchg(ptr, o, n) +#define this_cpu_cmpxchg_8(ptr, o, n) _protect_cmpxchg(ptr, o, n) #include _ Patches currently in -mm which might be from mtosatti@redhat.com are this_cpu_cmpxchg-arm64-switch-this_cpu_cmpxchg-to-locked-add-_local-function.patch this_cpu_cmpxchg-loongarch-switch-this_cpu_cmpxchg-to-locked-add-_local-function.patch this_cpu_cmpxchg-s390-switch-this_cpu_cmpxchg-to-locked-add-_local-function.patch this_cpu_cmpxchg-x86-switch-this_cpu_cmpxchg-to-locked-add-_local-function.patch add-this_cpu_cmpxchg_local-and-asm-generic-definitions.patch convert-this_cpu_cmpxchg-users-to-this_cpu_cmpxchg_local.patch mm-vmstat-switch-counter-modification-to-cmpxchg.patch vmstat-switch-per-cpu-vmstat-counters-to-32-bits.patch mm-vmstat-use-xchg-in-cpu_vm_stats_fold.patch mm-vmstat-switch-vmstat-shepherd-to-flush-per-cpu-counters-remotely.patch mm-vmstat-refresh-stats-remotely-instead-of-via-work-item.patch vmstat-add-pcp-remote-node-draining-via-cpu_vm_stats_fold.patch