From: Leonardo Bras <leonardo@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
kvm-ppc@vger.kernel.org, linux-arch@vger.kernel.org,
linux-mm@kvack.org
Cc: Leonardo Bras <leonardo@linux.ibm.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Arnd Bergmann <arnd@arndb.de>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
Christophe Leroy <christophe.leroy@c-s.fr>,
Andrew Morton <akpm@linux-foundation.org>,
Dan Williams <dan.j.williams@intel.com>,
Nicholas Piggin <npiggin@gmail.com>,
Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>,
Allison Randal <allison@lohutok.net>,
Thomas Gleixner <tglx@linutronix.de>,
Ganesh Goudar <ganeshgr@linux.ibm.com>,
Mike Rapoport <rppt@linux.ibm.com>,
YueHaibing <yuehaibing@huawei.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Ira Weiny <ira.weiny@intel.com>, Jason Gunthorpe <jgg@ziepe.ca>,
John Hubbard <jhubbard@nvidia.com>,
Keith Busch <keith.busch@intel.com>
Subject: [PATCH v4 11/11] powerpc/mm/book3s64/pgtable: Uses counting method to skip serializing
Date: Fri, 27 Sep 2019 20:40:08 -0300 [thread overview]
Message-ID: <20190927234008.11513-12-leonardo@linux.ibm.com> (raw)
In-Reply-To: <20190927234008.11513-1-leonardo@linux.ibm.com>
Skips slow part of serialize_against_pte_lookup if there is no running
lockless pagetable walk.
Signed-off-by: Leonardo Bras <leonardo@linux.ibm.com>
---
arch/powerpc/mm/book3s64/pgtable.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/book3s64/pgtable.c b/arch/powerpc/mm/book3s64/pgtable.c
index 6ba6195bff1b..27966481f2a6 100644
--- a/arch/powerpc/mm/book3s64/pgtable.c
+++ b/arch/powerpc/mm/book3s64/pgtable.c
@@ -95,7 +95,8 @@ static void do_nothing(void *unused)
void serialize_against_pte_lookup(struct mm_struct *mm)
{
smp_mb();
- smp_call_function_many(mm_cpumask(mm), do_nothing, NULL, 1);
+ if (running_lockless_pgtbl_walk(mm))
+ smp_call_function_many(mm_cpumask(mm), do_nothing, NULL, 1);
}
/*
--
2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Leonardo Bras <leonardo@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
kvm-ppc@vger.kernel.org, linux-arch@vger.kernel.org,
linux-mm@kvack.org
Cc: Leonardo Bras <leonardo@linux.ibm.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Arnd Bergmann <arnd@arndb.de>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
Christophe Leroy <christophe.leroy@c-s.fr>,
Andrew Morton <akpm@linux-foundation.org>,
Dan Williams <dan.j.williams@intel.com>,
Nicholas Piggin <npiggin@gmail.com>,
Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>,
Allison Randal <allison@lohutok.net>,
Thomas Gleixner <tglx@linutronix.de>,
Ganesh Goudar <ganeshgr@linux.ibm.com>,
Mike Rapoport <rppt@linux.ibm.com>,
YueHaibing <yuehaibing@huawei.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Ira Weiny <ira.weiny@intel.com>, Jason Gunthorpe <jgg@ziep>
Subject: [PATCH v4 11/11] powerpc/mm/book3s64/pgtable: Uses counting method to skip serializing
Date: Fri, 27 Sep 2019 20:40:08 -0300 [thread overview]
Message-ID: <20190927234008.11513-12-leonardo@linux.ibm.com> (raw)
In-Reply-To: <20190927234008.11513-1-leonardo@linux.ibm.com>
Skips slow part of serialize_against_pte_lookup if there is no running
lockless pagetable walk.
Signed-off-by: Leonardo Bras <leonardo@linux.ibm.com>
---
arch/powerpc/mm/book3s64/pgtable.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/book3s64/pgtable.c b/arch/powerpc/mm/book3s64/pgtable.c
index 6ba6195bff1b..27966481f2a6 100644
--- a/arch/powerpc/mm/book3s64/pgtable.c
+++ b/arch/powerpc/mm/book3s64/pgtable.c
@@ -95,7 +95,8 @@ static void do_nothing(void *unused)
void serialize_against_pte_lookup(struct mm_struct *mm)
{
smp_mb();
- smp_call_function_many(mm_cpumask(mm), do_nothing, NULL, 1);
+ if (running_lockless_pgtbl_walk(mm))
+ smp_call_function_many(mm_cpumask(mm), do_nothing, NULL, 1);
}
/*
--
2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Leonardo Bras <leonardo@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
kvm-ppc@vger.kernel.org, linux-arch@vger.kernel.org,
linux-mm@kvack.org
Cc: Keith Busch <keith.busch@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
Ganesh Goudar <ganeshgr@linux.ibm.com>,
YueHaibing <yuehaibing@huawei.com>,
Nicholas Piggin <npiggin@gmail.com>,
Mike Rapoport <rppt@linux.ibm.com>,
Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>,
Jason Gunthorpe <jgg@ziepe.ca>, Paul Mackerras <paulus@samba.org>,
John Hubbard <jhubbard@nvidia.com>,
Leonardo Bras <leonardo@linux.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Ira Weiny <ira.weiny@intel.com>,
Dan Williams <dan.j.williams@intel.com>,
Allison Randal <allison@lohutok.net>
Subject: [PATCH v4 11/11] powerpc/mm/book3s64/pgtable: Uses counting method to skip serializing
Date: Fri, 27 Sep 2019 20:40:08 -0300 [thread overview]
Message-ID: <20190927234008.11513-12-leonardo@linux.ibm.com> (raw)
In-Reply-To: <20190927234008.11513-1-leonardo@linux.ibm.com>
Skips slow part of serialize_against_pte_lookup if there is no running
lockless pagetable walk.
Signed-off-by: Leonardo Bras <leonardo@linux.ibm.com>
---
arch/powerpc/mm/book3s64/pgtable.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/book3s64/pgtable.c b/arch/powerpc/mm/book3s64/pgtable.c
index 6ba6195bff1b..27966481f2a6 100644
--- a/arch/powerpc/mm/book3s64/pgtable.c
+++ b/arch/powerpc/mm/book3s64/pgtable.c
@@ -95,7 +95,8 @@ static void do_nothing(void *unused)
void serialize_against_pte_lookup(struct mm_struct *mm)
{
smp_mb();
- smp_call_function_many(mm_cpumask(mm), do_nothing, NULL, 1);
+ if (running_lockless_pgtbl_walk(mm))
+ smp_call_function_many(mm_cpumask(mm), do_nothing, NULL, 1);
}
/*
--
2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Leonardo Bras <leonardo@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
kvm-ppc@vger.kernel.org, linux-arch@vger.kernel.org,
linux-mm@kvack.org
Cc: Leonardo Bras <leonardo@linux.ibm.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Arnd Bergmann <arnd@arndb.de>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
Christophe Leroy <christophe.leroy@c-s.fr>,
Andrew Morton <akpm@linux-foundation.org>,
Dan Williams <dan.j.williams@intel.com>,
Nicholas Piggin <npiggin@gmail.com>,
Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>,
Allison Randal <allison@lohutok.net>,
Thomas Gleixner <tglx@linutronix.de>,
Ganesh Goudar <ganeshgr@linux.ibm.com>,
Mike Rapoport <rppt@linux.ibm.com>,
YueHaibing <yuehaibing@huawei.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Ira Weiny <ira.weiny@intel.com>, Jason Gunthorpe <jgg@ziepe.ca>,
John Hubbard <jhubbard@nvidia.com>,
Keith Busch <keith.busch@intel.com>
Subject: [PATCH v4 11/11] powerpc/mm/book3s64/pgtable: Uses counting method to skip serializing
Date: Fri, 27 Sep 2019 23:40:08 +0000 [thread overview]
Message-ID: <20190927234008.11513-12-leonardo@linux.ibm.com> (raw)
In-Reply-To: <20190927234008.11513-1-leonardo@linux.ibm.com>
Skips slow part of serialize_against_pte_lookup if there is no running
lockless pagetable walk.
Signed-off-by: Leonardo Bras <leonardo@linux.ibm.com>
---
arch/powerpc/mm/book3s64/pgtable.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/book3s64/pgtable.c b/arch/powerpc/mm/book3s64/pgtable.c
index 6ba6195bff1b..27966481f2a6 100644
--- a/arch/powerpc/mm/book3s64/pgtable.c
+++ b/arch/powerpc/mm/book3s64/pgtable.c
@@ -95,7 +95,8 @@ static void do_nothing(void *unused)
void serialize_against_pte_lookup(struct mm_struct *mm)
{
smp_mb();
- smp_call_function_many(mm_cpumask(mm), do_nothing, NULL, 1);
+ if (running_lockless_pgtbl_walk(mm))
+ smp_call_function_many(mm_cpumask(mm), do_nothing, NULL, 1);
}
/*
--
2.20.1
next prev parent reply other threads:[~2019-09-27 23:42 UTC|newest]
Thread overview: 92+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-27 23:39 [PATCH v4 00/11] Introduces new count-based method for monitoring lockless pagetable walks Leonardo Bras
2019-09-27 23:39 ` Leonardo Bras
2019-09-27 23:39 ` Leonardo Bras
2019-09-27 23:39 ` Leonardo Bras
2019-09-27 23:39 ` [PATCH v4 01/11] powerpc/mm: Adds counting method to monitor lockless pgtable walks Leonardo Bras
2019-09-27 23:39 ` Leonardo Bras
2019-09-27 23:39 ` Leonardo Bras
2019-09-27 23:39 ` Leonardo Bras
2019-09-29 22:40 ` John Hubbard
2019-09-29 22:40 ` John Hubbard
2019-09-29 22:40 ` John Hubbard
2019-09-29 23:17 ` John Hubbard
2019-09-29 23:17 ` John Hubbard
2019-09-29 23:17 ` John Hubbard
2019-09-30 15:14 ` Leonardo Bras
2019-09-30 15:14 ` Leonardo Bras
2019-09-30 15:14 ` Leonardo Bras
2019-09-30 17:57 ` John Hubbard
2019-09-30 17:57 ` John Hubbard
2019-09-30 17:57 ` John Hubbard
2019-09-30 18:42 ` Leonardo Bras
2019-09-30 18:42 ` Leonardo Bras
2019-09-30 18:42 ` Leonardo Bras
2019-09-30 21:47 ` John Hubbard
2019-09-30 21:47 ` John Hubbard
2019-09-30 21:47 ` John Hubbard
2019-10-01 18:39 ` Leonardo Bras
2019-10-01 18:39 ` Leonardo Bras
2019-10-01 18:39 ` Leonardo Bras
2019-10-01 18:52 ` John Hubbard
2019-10-01 18:52 ` John Hubbard
2019-10-01 18:52 ` John Hubbard
2019-09-27 23:39 ` [PATCH v4 02/11] asm-generic/pgtable: Adds dummy functions " Leonardo Bras
2019-09-27 23:39 ` Leonardo Bras
2019-09-27 23:39 ` Leonardo Bras
2019-09-27 23:39 ` Leonardo Bras
2019-09-27 23:40 ` [PATCH v4 03/11] mm/gup: Applies counting method to monitor gup_pgd_range Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-30 11:09 ` Kirill A. Shutemov
2019-09-30 11:09 ` Kirill A. Shutemov
2019-09-30 11:09 ` Kirill A. Shutemov
2019-09-30 11:09 ` Kirill A. Shutemov
2019-09-30 14:27 ` Leonardo Bras
2019-09-30 14:27 ` Leonardo Bras
2019-09-30 14:27 ` Leonardo Bras
2019-09-30 14:27 ` Leonardo Bras
2019-09-30 21:51 ` John Hubbard
2019-09-30 21:51 ` John Hubbard
2019-09-30 21:51 ` John Hubbard
2019-10-01 17:56 ` Leonardo Bras
2019-10-01 17:56 ` Leonardo Bras
2019-10-01 17:56 ` Leonardo Bras
2019-10-01 19:04 ` John Hubbard
2019-10-01 19:04 ` John Hubbard
2019-10-01 19:04 ` John Hubbard
2019-10-01 19:40 ` Leonardo Bras
2019-10-01 19:40 ` Leonardo Bras
2019-10-01 19:40 ` Leonardo Bras
2019-09-27 23:40 ` [PATCH v4 04/11] powerpc/mce_power: Applies counting method to monitor lockless pgtbl walks Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` [PATCH v4 05/11] powerpc/perf: " Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` [PATCH v4 06/11] powerpc/mm/book3s64/hash: " Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` [PATCH v4 07/11] powerpc/kvm/e500: " Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` [PATCH v4 08/11] powerpc/kvm/book3s_hv: " Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` [PATCH v4 09/11] powerpc/kvm/book3s_64: " Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` [PATCH v4 10/11] powerpc/book3s_64: Enables counting method to monitor lockless pgtbl walk Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras [this message]
2019-09-27 23:40 ` [PATCH v4 11/11] powerpc/mm/book3s64/pgtable: Uses counting method to skip serializing Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
2019-09-27 23:40 ` Leonardo Bras
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