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,
Marcelo Tosatti <mtosatti@redhat.com>
Subject: [PATCH v2 02/11] this_cpu_cmpxchg: ARM64: switch this_cpu_cmpxchg to locked, add _local function
Date: Thu, 09 Feb 2023 12:01:52 -0300 [thread overview]
Message-ID: <20230209153204.683821550@redhat.com> (raw)
In-Reply-To: 20230209150150.380060673@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,
change ARM's this_cpu_cmpxchg_ helpers to be atomic,
and add this_cpu_cmpxchg_local_ helpers which are not atomic.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Index: linux-vmstat-remote/arch/arm64/include/asm/percpu.h
===================================================================
--- linux-vmstat-remote.orig/arch/arm64/include/asm/percpu.h
+++ linux-vmstat-remote/arch/arm64/include/asm/percpu.h
@@ -232,13 +232,23 @@ PERCPU_RET_OP(add, add, ldadd)
_pcp_protect_return(xchg_relaxed, pcp, val)
#define this_cpu_cmpxchg_1(pcp, o, n) \
- _pcp_protect_return(cmpxchg_relaxed, pcp, o, n)
+ _pcp_protect_return(cmpxchg, pcp, o, n)
#define this_cpu_cmpxchg_2(pcp, o, n) \
- _pcp_protect_return(cmpxchg_relaxed, pcp, o, n)
+ _pcp_protect_return(cmpxchg, pcp, o, n)
#define this_cpu_cmpxchg_4(pcp, o, n) \
- _pcp_protect_return(cmpxchg_relaxed, pcp, o, n)
+ _pcp_protect_return(cmpxchg, pcp, o, n)
#define this_cpu_cmpxchg_8(pcp, o, n) \
+ _pcp_protect_return(cmpxchg, pcp, o, n)
+
+#define this_cpu_cmpxchg_local_1(pcp, o, n) \
_pcp_protect_return(cmpxchg_relaxed, pcp, o, n)
+#define this_cpu_cmpxchg_local_2(pcp, o, n) \
+ _pcp_protect_return(cmpxchg_relaxed, pcp, o, n)
+#define this_cpu_cmpxchg_local_4(pcp, o, n) \
+ _pcp_protect_return(cmpxchg_relaxed, pcp, o, n)
+#define this_cpu_cmpxchg_local_8(pcp, o, n) \
+ _pcp_protect_return(cmpxchg_relaxed, pcp, o, n)
+
#ifdef __KVM_NVHE_HYPERVISOR__
extern unsigned long __hyp_per_cpu_offset(unsigned int cpu);
next prev parent reply other threads:[~2023-02-09 15:35 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-09 15:01 [PATCH v2 00/11] fold per-CPU vmstats remotely Marcelo Tosatti
2023-02-09 15:01 ` [PATCH v2 01/11] mm/vmstat: remove remote node draining Marcelo Tosatti
2023-02-28 15:53 ` David Hildenbrand
2023-02-28 19:36 ` Marcelo Tosatti
2023-03-02 10:10 ` David Hildenbrand
2023-03-21 15:20 ` Mel Gorman
2023-03-21 17:31 ` Marcelo Tosatti
2023-03-02 17:21 ` Peter Xu
2023-03-02 17:27 ` Peter Xu
2023-03-02 19:17 ` Marcelo Tosatti
2023-03-02 18:56 ` Marcelo Tosatti
2023-02-09 15:01 ` Marcelo Tosatti [this message]
2023-03-02 10:42 ` [PATCH v2 02/11] this_cpu_cmpxchg: ARM64: switch this_cpu_cmpxchg to locked, add _local function David Hildenbrand
2023-03-02 10:51 ` David Hildenbrand
2023-03-02 14:32 ` Marcelo Tosatti
2023-03-02 20:53 ` Peter Xu
2023-03-02 21:04 ` Marcelo Tosatti
2023-03-02 21:25 ` Peter Xu
2023-03-03 15:39 ` Marcelo Tosatti
2023-03-03 15:47 ` Marcelo Tosatti
2023-03-15 23:56 ` Christoph Lameter
2023-03-16 10:54 ` Marcelo Tosatti
2023-02-09 15:01 ` [PATCH v2 03/11] this_cpu_cmpxchg: loongarch: " Marcelo Tosatti
2023-02-09 15:01 ` [PATCH v2 04/11] this_cpu_cmpxchg: S390: " Marcelo Tosatti
2023-02-09 15:01 ` [PATCH v2 05/11] this_cpu_cmpxchg: x86: " Marcelo Tosatti
2023-02-09 15:01 ` [PATCH v2 06/11] this_cpu_cmpxchg: asm-generic: " Marcelo Tosatti
2023-02-09 15:01 ` [PATCH v2 07/11] convert this_cpu_cmpxchg users to this_cpu_cmpxchg_local Marcelo Tosatti
2023-03-02 20:54 ` Peter Xu
2023-02-09 15:01 ` [PATCH v2 08/11] mm/vmstat: switch counter modification to cmpxchg Marcelo Tosatti
2023-03-02 10:47 ` David Hildenbrand
2023-03-02 14:47 ` Marcelo Tosatti
2023-03-02 16:20 ` Peter Xu
2023-03-02 19:11 ` Marcelo Tosatti
2023-03-02 20:06 ` Peter Xu
2023-02-09 15:01 ` [PATCH v2 09/11] mm/vmstat: use cmpxchg loop in cpu_vm_stats_fold Marcelo Tosatti
2023-03-01 22:57 ` Peter Xu
2023-03-02 13:55 ` Marcelo Tosatti
2023-03-02 21:19 ` Peter Xu
2023-03-03 15:17 ` Marcelo Tosatti
2023-02-09 15:02 ` [PATCH v2 10/11] mm/vmstat: switch vmstat shepherd to flush per-CPU counters remotely Marcelo Tosatti
2023-03-02 21:01 ` Peter Xu
2023-03-02 21:16 ` Marcelo Tosatti
2023-03-02 21:30 ` Peter Xu
2023-02-09 15:02 ` [PATCH v2 11/11] mm/vmstat: refresh stats remotely instead of via work item Marcelo Tosatti
2023-02-23 14:54 ` [PATCH v2 00/11] fold per-CPU vmstats remotely Marcelo Tosatti
2023-02-24 2:34 ` Hillf Danton
2023-02-27 19:41 ` Marcelo Tosatti
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