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Fri, 04 Apr 2025 02:19:22 +0000 (GMT) Received: from pps.filterd (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (8.18.1.2/8.18.1.2) with ESMTP id 5340VAmN017338; Fri, 4 Apr 2025 02:19:21 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 45t2pspjbn-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 04 Apr 2025 02:19:21 +0000 Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 5342H8gm030074; Fri, 4 Apr 2025 02:19:20 GMT Received: from localhost.localdomain (ca-dev60.us.oracle.com [10.129.136.27]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 45t2pspj73-7; Fri, 04 Apr 2025 02:19:20 +0000 From: Anthony Yznaga To: akpm@linux-foundation.org, willy@infradead.org, markhemm@googlemail.com, viro@zeniv.linux.org.uk, david@redhat.com, khalid@kernel.org Cc: anthony.yznaga@oracle.com, andreyknvl@gmail.com, dave.hansen@intel.com, luto@kernel.org, brauner@kernel.org, arnd@arndb.de, ebiederm@xmission.com, catalin.marinas@arm.com, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhiramat@kernel.org, rostedt@goodmis.org, vasily.averin@linux.dev, xhao@linux.alibaba.com, pcc@google.com, neilb@suse.de, maz@kernel.org Subject: [PATCH v2 06/20] mm/mshare: Add a vma flag to indicate an mshare region Date: Thu, 3 Apr 2025 19:18:48 -0700 Message-ID: <20250404021902.48863-7-anthony.yznaga@oracle.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20250404021902.48863-1-anthony.yznaga@oracle.com> References: <20250404021902.48863-1-anthony.yznaga@oracle.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1095,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-04-04_01,2025-04-03_03,2024-11-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 bulkscore=0 mlxscore=0 spamscore=0 adultscore=0 suspectscore=0 mlxlogscore=999 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2502280000 definitions=main-2504040014 X-Proofpoint-GUID: CqLOZCNIvjq0vvOwi8VweFI6kJqfrYBW X-Proofpoint-ORIG-GUID: CqLOZCNIvjq0vvOwi8VweFI6kJqfrYBW X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 5074A2000A X-Stat-Signature: 3qiqr5g7pq8sm69cc34x94h4pjsginuf X-Rspam-User: X-HE-Tag: 1743733182-819176 X-HE-Meta: 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 2pZ6xFl+ nX+dHdleodp31EDoxZsBaRowN59qcQBvZBrab2d7dTSil9O7Gb0f/qqta7m+7d5htQLu/n1MgNYWX1vSl+9Hp1BQI1MgsRBCpCndwVDvnBF6lej3/ix5o2Im9U1MwIacs1QN3esw7CGGd4bXlVdNyoyVF1auXTzLM53yy1AvAJeu4IA8YiDGHY4kyHrARj0DbnsjKn372Akq8oLwcbAODsbAKYxsICvr8hmo0iHKl5NHSfKbVkckcHhJBil1UEIF9rr8N7qMMM0UpRyt9DgM32YQ3leklHbmZiQZBI9WKUXC67a5Zt+g/TSyhpGN4uI0LHn+7IvD+jx4SsPY= 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: List-Subscribe: List-Unsubscribe: From: Khalid Aziz An mshare region contains zero or more actual vmas that map objects in the mshare range with shared page tables. Signed-off-by: Khalid Aziz Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: Anthony Yznaga --- include/linux/mm.h | 19 +++++++++++++++++++ include/trace/events/mmflags.h | 7 +++++++ 2 files changed, 26 insertions(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index 778f5de6a12e..f2f9d15213ab 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -414,6 +414,13 @@ extern unsigned int kobjsize(const void *objp); #define VM_DROPPABLE VM_NONE #endif +#ifdef CONFIG_MSHARE +#define VM_MSHARE_BIT 41 +#define VM_MSHARE BIT(VM_MSHARE_BIT) +#else +#define VM_MSHARE VM_NONE +#endif + #ifdef CONFIG_64BIT /* VM is sealed, in vm_flags */ #define VM_SEALED _BITUL(63) @@ -1161,6 +1168,18 @@ static inline bool vma_is_anon_shmem(struct vm_area_struct *vma) { return false; int vma_is_stack_for_current(struct vm_area_struct *vma); +#ifdef CONFIG_MSHARE +static inline bool vma_is_mshare(const struct vm_area_struct *vma) +{ + return vma->vm_flags & VM_MSHARE; +} +#else +static inline bool vma_is_mshare(const struct vm_area_struct *vma) +{ + return false; +} +#endif + /* flush_tlb_range() takes a vma, not a mm, and can care about flags */ #define TLB_FLUSH_VMA(mm,flags) { .vm_mm = (mm), .vm_flags = (flags) } diff --git a/include/trace/events/mmflags.h b/include/trace/events/mmflags.h index 15aae955a10b..02ebd354ed55 100644 --- a/include/trace/events/mmflags.h +++ b/include/trace/events/mmflags.h @@ -202,6 +202,12 @@ IF_HAVE_PG_ARCH_3(arch_3) # define IF_HAVE_VM_DROPPABLE(flag, name) #endif +#ifdef CONFIG_MSHARE +# define IF_HAVE_VM_MSHARE(flag, name) {flag, name}, +#else +# define IF_HAVE_VM_MSHARE(flag, name) +#endif + #define __def_vmaflag_names \ {VM_READ, "read" }, \ {VM_WRITE, "write" }, \ @@ -235,6 +241,7 @@ IF_HAVE_VM_SOFTDIRTY(VM_SOFTDIRTY, "softdirty" ) \ {VM_HUGEPAGE, "hugepage" }, \ {VM_NOHUGEPAGE, "nohugepage" }, \ IF_HAVE_VM_DROPPABLE(VM_DROPPABLE, "droppable" ) \ +IF_HAVE_VM_MSHARE(VM_MSHARE, "mshare" ) \ {VM_MERGEABLE, "mergeable" } \ #define show_vma_flags(flags) \ -- 2.43.5