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Tue, 24 Sep 2019 21:25:36 +0000 Received: from b03ledav006.gho.boulder.ibm.com (b03ledav006.gho.boulder.ibm.com [9.17.130.237]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x8OLPYET48038312 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 24 Sep 2019 21:25:34 GMT Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7C37EC605B; Tue, 24 Sep 2019 21:25:34 +0000 (GMT) Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D72B0C605D; Tue, 24 Sep 2019 21:25:29 +0000 (GMT) Received: from LeoBras.aus.stglabs.ibm.com (unknown [9.18.235.184]) by b03ledav006.gho.boulder.ibm.com (Postfix) with ESMTP; Tue, 24 Sep 2019 21:25:29 +0000 (GMT) From: Leonardo Bras 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 , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Arnd Bergmann , "Aneesh Kumar K.V" , Christophe Leroy , Andrew Morton , Dan Williams , Nicholas Piggin , Mahesh Salgaonkar , Greg Kroah-Hartman , Thomas Gleixner , Ganesh Goudar , Allison Randal , Mike Rapoport , YueHaibing , Ira Weiny , Jason Gunthorpe , John Hubbard , Keith Busch Subject: [PATCH v3 10/11] powerpc/book3s_64: Enables counting method to monitor lockless pgtbl walk Date: Tue, 24 Sep 2019 18:24:27 -0300 Message-Id: <20190924212427.7734-11-leonardo@linux.ibm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190924212427.7734-1-leonardo@linux.ibm.com> References: <20190924212427.7734-1-leonardo@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-09-24_10:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1909240173 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Enables count-based monitoring method for lockless pagetable walks on PowerPC book3s_64. Other architectures/platforms fallback to using generic dummy functions. Signed-off-by: Leonardo Bras --- arch/powerpc/include/asm/book3s/64/pgtable.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/= include/asm/book3s/64/pgtable.h index 8308f32e9782..eb9b26a4a483 100644 --- a/arch/powerpc/include/asm/book3s/64/pgtable.h +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h @@ -1370,5 +1370,10 @@ static inline bool pgd_is_leaf(pgd_t pgd) return !!(pgd_raw(pgd) & cpu_to_be64(_PAGE_PTE)); } =20 +#define __HAVE_ARCH_LOCKLESS_PGTBL_WALK_COUNTER +void start_lockless_pgtbl_walk(struct mm_struct *mm); +void end_lockless_pgtbl_walk(struct mm_struct *mm); +int running_lockless_pgtbl_walk(struct mm_struct *mm); + #endif /* __ASSEMBLY__ */ #endif /* _ASM_POWERPC_BOOK3S_64_PGTABLE_H_ */ --=20 2.20.1