From patchwork Fri May 20 03:15:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Song Liu X-Patchwork-Id: 12856261 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 45955C433F5 for ; Fri, 20 May 2022 03:19:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345148AbiETDTA convert rfc822-to-8bit (ORCPT ); Thu, 19 May 2022 23:19:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53836 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345169AbiETDS6 (ORCPT ); Thu, 19 May 2022 23:18:58 -0400 Received: from mx0a-00082601.pphosted.com (mx0a-00082601.pphosted.com [67.231.145.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C5CE014A25E for ; Thu, 19 May 2022 20:18:57 -0700 (PDT) Received: from pps.filterd (m0044012.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 24JKmWte017172 for ; Thu, 19 May 2022 20:18:57 -0700 Received: from mail.thefacebook.com ([163.114.132.120]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3g5pj4w87v-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 19 May 2022 20:18:57 -0700 Received: from twshared11660.23.frc3.facebook.com (2620:10d:c085:108::8) by mail.thefacebook.com (2620:10d:c085:11d::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.28; Thu, 19 May 2022 20:18:56 -0700 Received: by devbig932.frc1.facebook.com (Postfix, from userid 4523) id 363FC7D8C302; Thu, 19 May 2022 20:16:08 -0700 (PDT) From: Song Liu To: , , CC: , , , , , , , Song Liu Subject: [PATCH v3 bpf-next 7/8] vmalloc: introduce huge_vmalloc_supported Date: Thu, 19 May 2022 20:15:47 -0700 Message-ID: <20220520031548.338934-8-song@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220520031548.338934-1-song@kernel.org> References: <20220520031548.338934-1-song@kernel.org> MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-GUID: IROkRLn5KQCyONhPZ9J8DCUw0Zx-k2bC X-Proofpoint-ORIG-GUID: IROkRLn5KQCyONhPZ9J8DCUw0Zx-k2bC X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.874,Hydra:6.0.486,FMLib:17.11.64.514 definitions=2022-05-20_01,2022-05-19_03,2022-02-23_01 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net huge_vmalloc_supported() exposes vmap_allow_huge so that users of vmalloc APIs could know whether vmalloc will return huge pages. Suggested-by: Rick Edgecombe Signed-off-by: Song Liu --- include/linux/vmalloc.h | 6 ++++++ mm/vmalloc.c | 5 +++++ 2 files changed, 11 insertions(+) diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 5e0d0a60d9d5..22e81c1813bd 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -242,11 +242,17 @@ static inline void set_vm_flush_reset_perms(void *addr) if (vm) vm->flags |= VM_FLUSH_RESET_PERMS; } +bool huge_vmalloc_supported(void); #else static inline void set_vm_flush_reset_perms(void *addr) { } + +static inline bool huge_vmalloc_supported(void) +{ + return false; +} #endif /* for /proc/kcore */ diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 07da85ae825b..d3b11317b025 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -72,6 +72,11 @@ early_param("nohugevmalloc", set_nohugevmalloc); static const bool vmap_allow_huge = false; #endif /* CONFIG_HAVE_ARCH_HUGE_VMALLOC */ +bool huge_vmalloc_supported(void) +{ + return vmap_allow_huge; +} + bool is_vmalloc_addr(const void *x) { unsigned long addr = (unsigned long)kasan_reset_tag(x);