From: Marcelo Tosatti <mtosatti@redhat.com>
To: Christoph Lameter <cl@linux.com>
Cc: Aaron Tomlin <atomlin@atomlin.com>,
Frederic Weisbecker <frederic@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Russell King <linux@armlinux.org.uk>,
Huacai Chen <chenhuacai@kernel.org>,
Heiko Carstens <hca@linux.ibm.com>,
x86@kernel.org, Vlastimil Babka <vbabka@suse.cz>,
Michal Hocko <mhocko@suse.com>,
Marcelo Tosatti <mtosatti@redhat.com>
Subject: [PATCH v6 03/12] this_cpu_cmpxchg: S390: switch this_cpu_cmpxchg to locked, add _local function
Date: Tue, 14 Mar 2023 15:59:17 -0300 [thread overview]
Message-ID: <20230314185951.603655249@redhat.com> (raw)
In-Reply-To: 20230314185914.836510860@redhat.com
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 S390's this_cpu_cmpxchg_local.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Index: linux-vmstat-remote/arch/s390/include/asm/percpu.h
===================================================================
--- linux-vmstat-remote.orig/arch/s390/include/asm/percpu.h
+++ linux-vmstat-remote/arch/s390/include/asm/percpu.h
@@ -148,6 +148,11 @@
#define this_cpu_cmpxchg_4(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval)
#define this_cpu_cmpxchg_8(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval)
+#define this_cpu_cmpxchg_local_1(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval)
+#define this_cpu_cmpxchg_local_2(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval)
+#define this_cpu_cmpxchg_local_4(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval)
+#define this_cpu_cmpxchg_local_8(pcp, oval, nval) arch_this_cpu_cmpxchg(pcp, oval, nval)
+
#define arch_this_cpu_xchg(pcp, nval) \
({ \
typeof(pcp) *ptr__; \
next prev parent reply other threads:[~2023-03-14 19:01 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-14 18:59 [PATCH v6 00/12] fold per-CPU vmstats remotely Marcelo Tosatti
2023-03-14 18:59 ` [PATCH v6 01/12] this_cpu_cmpxchg: ARM64: switch this_cpu_cmpxchg to locked, add _local function Marcelo Tosatti
2023-03-14 18:59 ` [PATCH v6 02/12] this_cpu_cmpxchg: loongarch: " Marcelo Tosatti
2023-03-14 18:59 ` Marcelo Tosatti [this message]
2023-03-14 18:59 ` [PATCH v6 04/12] this_cpu_cmpxchg: x86: " Marcelo Tosatti
2023-03-14 18:59 ` [PATCH v6 05/12] add this_cpu_cmpxchg_local and asm-generic definitions Marcelo Tosatti
2023-03-14 18:59 ` [PATCH v6 06/12] convert this_cpu_cmpxchg users to this_cpu_cmpxchg_local Marcelo Tosatti
2023-03-14 18:59 ` [PATCH v6 07/12] mm/vmstat: switch counter modification to cmpxchg Marcelo Tosatti
2023-03-14 18:59 ` [PATCH v6 08/12] vmstat: switch per-cpu vmstat counters to 32-bits Marcelo Tosatti
2023-03-14 18:59 ` [PATCH v6 09/12] mm/vmstat: use xchg in cpu_vm_stats_fold Marcelo Tosatti
2023-03-14 18:59 ` [PATCH v6 10/12] mm/vmstat: switch vmstat shepherd to flush per-CPU counters remotely Marcelo Tosatti
2023-03-14 18:59 ` [PATCH v6 11/12] mm/vmstat: refresh stats remotely instead of via work item Marcelo Tosatti
2023-03-14 18:59 ` [PATCH v6 12/12] vmstat: add pcp remote node draining via cpu_vm_stats_fold Marcelo Tosatti
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