From: Anthony Yznaga <anthony.yznaga@oracle.com>
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 10/20] mm: add mmap_read_lock_killable_nested()
Date: Thu, 3 Apr 2025 19:18:52 -0700 [thread overview]
Message-ID: <20250404021902.48863-11-anthony.yznaga@oracle.com> (raw)
In-Reply-To: <20250404021902.48863-1-anthony.yznaga@oracle.com>
This will be used to support mshare functionality where the read
lock on an mshare host mm is taken while holding the lock on a
process mm.
Signed-off-by: Anthony Yznaga <anthony.yznaga@oracle.com>
---
include/linux/mmap_lock.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/linux/mmap_lock.h b/include/linux/mmap_lock.h
index 4706c6769902..a14d74822846 100644
--- a/include/linux/mmap_lock.h
+++ b/include/linux/mmap_lock.h
@@ -185,6 +185,13 @@ static inline void mmap_read_lock(struct mm_struct *mm)
__mmap_lock_trace_acquire_returned(mm, false, true);
}
+static inline void mmap_read_lock_nested(struct mm_struct *mm, int subclass)
+{
+ __mmap_lock_trace_start_locking(mm, false);
+ down_read_nested(&mm->mmap_lock, subclass);
+ __mmap_lock_trace_acquire_returned(mm, false, true);
+}
+
static inline int mmap_read_lock_killable(struct mm_struct *mm)
{
int ret;
--
2.43.5
next prev parent reply other threads:[~2025-04-04 3:23 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-04 2:18 [PATCH v2 00/20] Add support for shared PTEs across processes Anthony Yznaga
2025-04-04 2:18 ` [PATCH v2 01/20] mm: Add msharefs filesystem Anthony Yznaga
2025-04-04 2:18 ` [PATCH v2 02/20] mm/mshare: pre-populate msharefs with information file Anthony Yznaga
2025-04-04 2:18 ` [PATCH v2 03/20] mm/mshare: make msharefs writable and support directories Anthony Yznaga
2025-04-04 2:18 ` [PATCH v2 04/20] mm/mshare: allocate an mm_struct for msharefs files Anthony Yznaga
2025-04-04 2:18 ` [PATCH v2 05/20] mm/mshare: add ways to set the size of an mshare region Anthony Yznaga
2025-04-04 2:18 ` [PATCH v2 06/20] mm/mshare: Add a vma flag to indicate " Anthony Yznaga
2025-04-04 2:18 ` [PATCH v2 07/20] mm/mshare: Add mmap support Anthony Yznaga
2025-04-04 2:18 ` [PATCH v2 08/20] mm/mshare: flush all TLBs when updating PTEs in an mshare range Anthony Yznaga
2025-05-30 14:41 ` Jann Horn
2025-05-30 16:29 ` Anthony Yznaga
2025-05-30 17:46 ` Jann Horn
2025-05-30 22:47 ` Anthony Yznaga
2025-04-04 2:18 ` [PATCH v2 09/20] sched/numa: do not scan msharefs vmas Anthony Yznaga
2025-04-04 2:18 ` Anthony Yznaga [this message]
2025-04-04 2:18 ` [PATCH v2 11/20] mm: add and use unmap_page_range vm_ops hook Anthony Yznaga
2025-04-04 2:18 ` [PATCH v2 12/20] mm/mshare: prepare for page table sharing support Anthony Yznaga
2025-05-30 14:56 ` Jann Horn
2025-05-30 16:41 ` Anthony Yznaga
2025-06-02 15:26 ` Jann Horn
2025-06-02 22:02 ` Anthony Yznaga
2025-04-04 2:18 ` [PATCH v2 13/20] x86/mm: enable page table sharing Anthony Yznaga
2025-08-12 13:46 ` Yongting Lin
2025-08-12 17:12 ` Anthony Yznaga
2025-08-18 9:44 ` Yongting Lin
2025-08-20 1:32 ` Anthony Yznaga
2025-04-04 2:18 ` [PATCH v2 14/20] mm: create __do_mmap() to take an mm_struct * arg Anthony Yznaga
2025-04-04 2:18 ` [PATCH v2 15/20] mm: pass the mm in vma_munmap_struct Anthony Yznaga
2025-04-04 2:18 ` [PATCH v2 16/20] mm/mshare: Add an ioctl for mapping objects in an mshare region Anthony Yznaga
2025-04-04 2:18 ` [PATCH v2 17/20] mm/mshare: Add an ioctl for unmapping " Anthony Yznaga
2025-04-04 2:19 ` [PATCH v2 18/20] mm/mshare: provide a way to identify an mm as an mshare host mm Anthony Yznaga
2025-04-04 2:19 ` [PATCH v2 19/20] mm/mshare: get memcg from current->mm instead of mshare mm Anthony Yznaga
2025-04-04 2:19 ` [PATCH v2 20/20] mm/mshare: associate a mem cgroup with an mshare file Anthony Yznaga
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