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, Marcelo Tosatti <mtosatti@redhat.com>
Subject: [PATCH v3 06/11] add this_cpu_cmpxchg_local and asm-generic definitions
Date: Fri, 03 Mar 2023 16:58:47 -0300 [thread overview]
Message-ID: <20230303195908.901973993@redhat.com> (raw)
In-Reply-To: <20230303195841.310844446@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.
Add this_cpu_cmpxchg_local_ helpers to asm-generic/percpu.h.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Index: linux-vmstat-remote/include/asm-generic/percpu.h
===================================================================
--- linux-vmstat-remote.orig/include/asm-generic/percpu.h
+++ linux-vmstat-remote/include/asm-generic/percpu.h
@@ -424,6 +424,23 @@ do { \
this_cpu_generic_cmpxchg(pcp, oval, nval)
#endif
+#ifndef this_cpu_cmpxchg_local_1
+#define this_cpu_cmpxchg_local_1(pcp, oval, nval) \
+ this_cpu_generic_cmpxchg(pcp, oval, nval)
+#endif
+#ifndef this_cpu_cmpxchg_local_2
+#define this_cpu_cmpxchg_local_2(pcp, oval, nval) \
+ this_cpu_generic_cmpxchg(pcp, oval, nval)
+#endif
+#ifndef this_cpu_cmpxchg_local_4
+#define this_cpu_cmpxchg_local_4(pcp, oval, nval) \
+ this_cpu_generic_cmpxchg(pcp, oval, nval)
+#endif
+#ifndef this_cpu_cmpxchg_local_8
+#define this_cpu_cmpxchg_local_8(pcp, oval, nval) \
+ this_cpu_generic_cmpxchg(pcp, oval, nval)
+#endif
+
#ifndef this_cpu_cmpxchg_double_1
#define this_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \
this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2)
Index: linux-vmstat-remote/include/linux/percpu-defs.h
===================================================================
--- linux-vmstat-remote.orig/include/linux/percpu-defs.h
+++ linux-vmstat-remote/include/linux/percpu-defs.h
@@ -513,6 +513,8 @@ do { \
#define this_cpu_xchg(pcp, nval) __pcpu_size_call_return2(this_cpu_xchg_, pcp, nval)
#define this_cpu_cmpxchg(pcp, oval, nval) \
__pcpu_size_call_return2(this_cpu_cmpxchg_, pcp, oval, nval)
+#define this_cpu_cmpxchg_local(pcp, oval, nval) \
+ __pcpu_size_call_return2(this_cpu_cmpxchg_local_, pcp, oval, nval)
#define this_cpu_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
__pcpu_double_call_return_bool(this_cpu_cmpxchg_double_, pcp1, pcp2, oval1, oval2, nval1, nval2)
next prev parent reply other threads:[~2023-03-03 20:00 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-03 19:58 [PATCH v3 00/11] fold per-CPU vmstats remotely Marcelo Tosatti
2023-03-03 19:58 ` [PATCH v3 01/11] mm/vmstat: remove remote node draining Marcelo Tosatti
2023-03-03 19:58 ` [PATCH v3 02/11] this_cpu_cmpxchg: ARM64: switch this_cpu_cmpxchg to locked, add _local function Marcelo Tosatti
2023-03-03 19:58 ` [PATCH v3 03/11] this_cpu_cmpxchg: loongarch: " Marcelo Tosatti
2023-03-03 19:58 ` [PATCH v3 04/11] this_cpu_cmpxchg: S390: " Marcelo Tosatti
2023-03-03 19:58 ` [PATCH v3 05/11] this_cpu_cmpxchg: x86: " Marcelo Tosatti
2023-03-03 19:58 ` Marcelo Tosatti [this message]
2023-03-03 19:58 ` [PATCH v3 07/11] convert this_cpu_cmpxchg users to this_cpu_cmpxchg_local Marcelo Tosatti
2023-03-03 19:58 ` [PATCH v3 08/11] mm/vmstat: switch counter modification to cmpxchg Marcelo Tosatti
2023-03-03 19:58 ` [PATCH v3 09/11] mm/vmstat: use xchg in cpu_vm_stats_fold Marcelo Tosatti
2023-03-03 19:58 ` [PATCH v3 10/11] mm/vmstat: switch vmstat shepherd to flush per-CPU counters remotely Marcelo Tosatti
2023-03-03 19:58 ` [PATCH v3 11/11] mm/vmstat: refresh stats remotely instead of via work item Marcelo Tosatti
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