From patchwork Tue Mar 24 13:45:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhenyu Ye X-Patchwork-Id: 11455463 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2C15917D4 for ; Tue, 24 Mar 2020 13:46:22 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 046B720753 for ; Tue, 24 Mar 2020 13:46:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 046B720753 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 1C66A6B0007; Tue, 24 Mar 2020 09:46:17 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 127846B0008; Tue, 24 Mar 2020 09:46:17 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CC1B06B000A; Tue, 24 Mar 2020 09:46:16 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0067.hostedemail.com [216.40.44.67]) by kanga.kvack.org (Postfix) with ESMTP id 9A67E6B0008 for ; Tue, 24 Mar 2020 09:46:16 -0400 (EDT) Received: from smtpin02.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 84AEC160A5 for ; Tue, 24 Mar 2020 13:46:16 +0000 (UTC) X-FDA: 76630379952.02.gun27_53c7c9a8d6427 X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,yezhenyu2@huawei.com,,RULES_HIT:30029:30054,0,RBL:45.249.212.32:@huawei.com:.lbl8.mailshell.net-62.18.2.100 64.95.201.95,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: gun27_53c7c9a8d6427 X-Filterd-Recvd-Size: 4360 Received: from huawei.com (szxga06-in.huawei.com [45.249.212.32]) by imf09.hostedemail.com (Postfix) with ESMTP for ; Tue, 24 Mar 2020 13:46:15 +0000 (UTC) Received: from DGGEMS410-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 5368CAA17414541C128E; Tue, 24 Mar 2020 21:46:11 +0800 (CST) Received: from DESKTOP-KKJBAGG.china.huawei.com (10.173.220.25) by DGGEMS410-HUB.china.huawei.com (10.3.19.210) with Microsoft SMTP Server id 14.3.487.0; Tue, 24 Mar 2020 21:46:04 +0800 From: Zhenyu Ye To: , , , , , , , , , , , , , , , , CC: , , , , , , , , Subject: [RFC PATCH v4 4/6] mm: Add page table level flags to vm_flags Date: Tue, 24 Mar 2020 21:45:32 +0800 Message-ID: <20200324134534.1570-5-yezhenyu2@huawei.com> X-Mailer: git-send-email 2.22.0.windows.1 In-Reply-To: <20200324134534.1570-1-yezhenyu2@huawei.com> References: <20200324134534.1570-1-yezhenyu2@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.173.220.25] X-CFilter-Loop: Reflected 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: Add VM_LEVEL_[PUD|PMD|PTE] to vm_flags to indicate which level of the page tables the vma is in. Those flags can be used to reduce the cost of TLB invalidation. These should be common flags for all architectures, however, those flags are only available in 64-bits system currently, because the lower-order flags are fully used. These flags are only used by ARM64 architecture now. See in next patch. Signed-off-by: Zhenyu Ye --- include/linux/mm.h | 10 ++++++++++ include/trace/events/mmflags.h | 15 ++++++++++++++- 2 files changed, 24 insertions(+), 1 deletion(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index c54fb96cb1e6..3ff16ffa5e83 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -313,6 +313,16 @@ extern unsigned int kobjsize(const void *objp); #endif #endif /* CONFIG_ARCH_HAS_PKEYS */ +#ifdef CONFIG_64BIT +# define VM_LEVEL_PUD BIT(37) /* vma is in pud-level of page table */ +# define VM_LEVEL_PMD BIT(38) /* vma is in pmd-level of page table */ +# define VM_LEVEL_PTE BIT(39) /* vma is in pte-level of page table */ +#else +# define VM_LEVEL_PUD 0 +# define VM_LEVEL_PMD 0 +# define VM_LEVEL_PTE 0 +#endif /* CONFIG_64BIT */ + #if defined(CONFIG_X86) # define VM_PAT VM_ARCH_1 /* PAT reserves whole VMA at once (x86) */ #elif defined(CONFIG_PPC) diff --git a/include/trace/events/mmflags.h b/include/trace/events/mmflags.h index a1675d43777e..9f13cfa96f9f 100644 --- a/include/trace/events/mmflags.h +++ b/include/trace/events/mmflags.h @@ -130,6 +130,16 @@ IF_HAVE_PG_IDLE(PG_idle, "idle" ) #define IF_HAVE_VM_SOFTDIRTY(flag,name) #endif +#ifdef CONFIG_64BIT +#define IF_HAVE_VM_LEVEL_PUD(flag,name) {flag, name} +#define IF_HAVE_VM_LEVEL_PMD(flag,name) {flag, name} +#define IF_HAVE_VM_LEVEL_PTE(flag,name) {flag, name} +#else +#define IF_HAVE_VM_LEVEL_PUD(flag,name) +#define IF_HAVE_VM_LEVEL_PMD(flag,name) +#define IF_HAVE_VM_LEVEL_PTE(flag,name) +#endif + #define __def_vmaflag_names \ {VM_READ, "read" }, \ {VM_WRITE, "write" }, \ @@ -161,7 +171,10 @@ IF_HAVE_VM_SOFTDIRTY(VM_SOFTDIRTY, "softdirty" ) \ {VM_MIXEDMAP, "mixedmap" }, \ {VM_HUGEPAGE, "hugepage" }, \ {VM_NOHUGEPAGE, "nohugepage" }, \ - {VM_MERGEABLE, "mergeable" } \ + {VM_MERGEABLE, "mergeable" }, \ +IF_HAVE_VM_LEVEL_PUD(VM_LEVEL_PUD, "pud-level" ), \ +IF_HAVE_VM_LEVEL_PMD(VM_LEVEL_PMD, "pmd-level" ), \ +IF_HAVE_VM_LEVEL_PTE(VM_LEVEL_PTE, "pte-level" ) \ #define show_vma_flags(flags) \ (flags) ? __print_flags(flags, "|", \