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Thu, 12 Aug 2021 13:28:40 GMT Received: from b03cxnp08025.gho.boulder.ibm.com (b03cxnp08025.gho.boulder.ibm.com [9.17.130.17]) by ppma03dal.us.ibm.com with ESMTP id 3a9htfu019-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 12 Aug 2021 13:28:39 +0000 Received: from b03ledav003.gho.boulder.ibm.com (b03ledav003.gho.boulder.ibm.com [9.17.130.234]) by b03cxnp08025.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 17CDSbKc53739998 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 12 Aug 2021 13:28:37 GMT Received: from b03ledav003.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8B1396A047; Thu, 12 Aug 2021 13:28:37 +0000 (GMT) Received: from b03ledav003.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 361CE6A04D; Thu, 12 Aug 2021 13:28:36 +0000 (GMT) Received: from skywalker.ibmuc.com (unknown [9.199.50.186]) by b03ledav003.gho.boulder.ibm.com (Postfix) with ESMTP; Thu, 12 Aug 2021 13:28:35 +0000 (GMT) From: "Aneesh Kumar K.V" To: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au Subject: [PATCH v2 1/2] powerpc/book3s64/radix: make tlb_single_page_flush_ceiling a debugfs entry Date: Thu, 12 Aug 2021 18:58:30 +0530 Message-Id: <20210812132831.233794-1-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: GuTS0JvXorvuNFgGU2YdWAuL5rId9XkM X-Proofpoint-ORIG-GUID: GuTS0JvXorvuNFgGU2YdWAuL5rId9XkM X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.790 definitions=2021-08-12_04:2021-08-12, 2021-08-12 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 adultscore=0 bulkscore=0 impostorscore=0 mlxlogscore=999 suspectscore=0 malwarescore=0 spamscore=0 mlxscore=0 phishscore=0 clxscore=1015 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2107140000 definitions=main-2108120085 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Aneesh Kumar K.V" Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Similar to x86/s390 add a debugfs file to tune tlb_single_page_flush_ceiling. Also add a debugfs entry for tlb_local_single_page_flush_ceiling. Signed-off-by: Aneesh Kumar K.V --- Changes from v1: * switch to debugfs_create_u32 arch/powerpc/mm/book3s64/radix_tlb.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/mm/book3s64/radix_tlb.c b/arch/powerpc/mm/book3s64/radix_tlb.c index aefc100d79a7..1fa2bc6a969e 100644 --- a/arch/powerpc/mm/book3s64/radix_tlb.c +++ b/arch/powerpc/mm/book3s64/radix_tlb.c @@ -17,6 +17,7 @@ #include #include #include +#include #include "internal.h" @@ -1106,8 +1107,8 @@ EXPORT_SYMBOL(radix__flush_tlb_kernel_range); * invalidating a full PID, so it has a far lower threshold to change from * individual page flushes to full-pid flushes. */ -static unsigned long tlb_single_page_flush_ceiling __read_mostly = 33; -static unsigned long tlb_local_single_page_flush_ceiling __read_mostly = POWER9_TLB_SETS_RADIX * 2; +static u32 tlb_single_page_flush_ceiling __read_mostly = 33; +static u32 tlb_local_single_page_flush_ceiling __read_mostly = POWER9_TLB_SETS_RADIX * 2; static inline void __radix__flush_tlb_range(struct mm_struct *mm, unsigned long start, unsigned long end) @@ -1524,3 +1525,14 @@ void do_h_rpt_invalidate_prt(unsigned long pid, unsigned long lpid, EXPORT_SYMBOL_GPL(do_h_rpt_invalidate_prt); #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */ + +static int __init create_tlb_single_page_flush_ceiling(void) +{ + debugfs_create_u32("tlb_single_page_flush_ceiling", 0600, + powerpc_debugfs_root, &tlb_single_page_flush_ceiling); + debugfs_create_u32("tlb_local_single_page_flush_ceiling", 0600, + powerpc_debugfs_root, &tlb_local_single_page_flush_ceiling); + return 0; +} +late_initcall(create_tlb_single_page_flush_ceiling); + -- 2.31.1