From: Leonardo Bras <leonardo@linux•ibm.com>
To: linuxppc-dev@lists•ozlabs.org, linux-kernel@vger•kernel.org
Cc: Keith Busch <keith.busch@intel•com>,
Richard Fontana <rfontana@redhat•com>,
Paul Mackerras <paulus@samba•org>,
Ira Weiny <ira.weiny@intel•com>,
Dan Williams <dan.j.williams@intel•com>,
"Aneesh Kumar K.V" <aneesh.kumar@linux•ibm.com>,
YueHaibing <yuehaibing@huawei•com>,
Mike Rapoport <rppt@linux•ibm.com>,
Jason Gunthorpe <jgg@ziepe•ca>,
Ganesh Goudar <ganeshgr@linux•ibm.com>,
Mahesh Salgaonkar <mahesh@linux•vnet.ibm.com>,
Leonardo Bras <leonardo@linux•ibm.com>,
Arnd Bergmann <arnd@arndb•de>, John Hubbard <jhubbard@nvidia•com>,
Nicholas Piggin <npiggin@gmail•com>,
Thomas Gleixner <tglx@linutronix•de>,
Allison Randal <allison@lohutok•net>,
Greg Kroah-Hartman <gregkh@linuxfoundation•org>,
Andrew Morton <akpm@linux-foundation•org>
Subject: [PATCH v2 11/11] powerpc/mm/book3s64/pgtable: Uses counting method to skip serializing
Date: Fri, 20 Sep 2019 16:50:47 -0300 [thread overview]
Message-ID: <20190920195047.7703-12-leonardo@linux.ibm.com> (raw)
In-Reply-To: <20190920195047.7703-1-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 13239b17a22c..41ca30269fa3 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);
}
void start_lockless_pgtbl_walk(struct mm_struct *mm)
--
2.20.1
next prev parent reply other threads:[~2019-09-20 20:18 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-20 19:50 [PATCH v2 00/11] Introduces new count-based method for monitoring lockless pagetable wakls Leonardo Bras
2019-09-20 19:50 ` [PATCH v2 01/11] powerpc/mm: Adds counting method to monitor lockless pgtable walks Leonardo Bras
2019-09-23 20:42 ` John Hubbard
2019-09-23 20:50 ` Leonardo Bras
2019-09-20 19:50 ` [PATCH v2 02/11] asm-generic/pgtable: Adds dummy functions " Leonardo Bras
2019-09-23 20:39 ` John Hubbard
2019-09-23 20:48 ` Leonardo Bras
2019-09-23 20:53 ` John Hubbard
2019-09-20 19:50 ` [PATCH v2 03/11] mm/gup: Applies counting method to monitor gup_pgd_range Leonardo Bras
2019-09-23 20:27 ` John Hubbard
2019-09-23 21:01 ` Leonardo Bras
2019-09-23 21:09 ` John Hubbard
2019-09-20 19:50 ` [PATCH v2 04/11] powerpc/mce_power: Applies counting method to monitor lockless pgtbl walks Leonardo Bras
2019-09-20 19:50 ` [PATCH v2 05/11] powerpc/perf: " Leonardo Bras
2019-09-20 19:50 ` [PATCH v2 06/11] powerpc/mm/book3s64/hash: " Leonardo Bras
2019-09-20 19:50 ` [PATCH v2 07/11] powerpc/kvm/e500: " Leonardo Bras
2019-09-20 19:50 ` [PATCH v2 08/11] powerpc/kvm/book3s_hv: " Leonardo Bras
2019-09-23 20:47 ` John Hubbard
2019-09-20 19:50 ` [PATCH v2 09/11] powerpc/kvm/book3s_64: " Leonardo Bras
2019-09-20 19:50 ` [PATCH v2 10/11] powerpc/book3s_64: Enables counting method to monitor lockless pgtbl walk Leonardo Bras
2019-09-20 19:50 ` Leonardo Bras [this message]
2019-09-20 20:11 ` [PATCH v2 11/11] powerpc/mm/book3s64/pgtable: Uses counting method to skip serializing John Hubbard
2019-09-20 20:28 ` Leonardo Bras
2019-09-20 21:15 ` John Hubbard
2019-09-21 0:48 ` John Hubbard
2019-09-23 17:25 ` Leonardo Bras
2019-09-23 18:14 ` John Hubbard
2019-09-23 19:40 ` Leonardo Bras
2019-09-23 19:58 ` John Hubbard
2019-09-23 20:23 ` Leonardo Bras
2019-09-23 20:26 ` John Hubbard
2019-09-20 19:56 ` [PATCH v2 00/11] Introduces new count-based method for monitoring lockless pagetable wakls Leonardo Bras
2019-09-20 20:12 ` Leonardo Bras
2019-09-20 21:24 ` John Hubbard
2019-09-23 20:51 ` John Hubbard
2019-09-23 20:58 ` Leonardo Bras
-- strict thread matches above, loose matches on Subject: below --
2019-09-24 21:23 [PATCH v2 11/11] powerpc/mm/book3s64/pgtable: Uses counting method to skip serializing Leonardo Bras
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