From: Anthony Yznaga <anthony.yznaga@oracle.com>
To: David Hildenbrand <david@redhat.com>, linux-mm@kvack.org
Cc: akpm@linux-foundation.org, andreyknvl@gmail.com, arnd@arndb.de,
bp@alien8.de, brauner@kernel.org, bsegall@google.com,
corbet@lwn.net, dave.hansen@linux.intel.com,
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linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org
Subject: Re: [PATCH v3 06/22] mm/mshare: Add a vma flag to indicate an mshare region
Date: Mon, 8 Sep 2025 11:56:54 -0700 [thread overview]
Message-ID: <b99517e5-7b4b-494e-8ec6-918f933ddf50@oracle.com> (raw)
In-Reply-To: <5c43116f-fef9-426d-8c90-1a3a129f3d20@redhat.com>
On 9/8/25 11:45 AM, David Hildenbrand wrote:
> On 20.08.25 03:03, Anthony Yznaga wrote:
>> From: Khalid Aziz <khalid@kernel.org>
>>
>> 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 <khalid@kernel.org>
>> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
>> Signed-off-by: Anthony Yznaga <anthony.yznaga@oracle.com>
>> ---
>
> Why can't we query the mapping instead?
>
The bit check is nice and zippy since vma_is_mshare() is called for
every fault, but it's not required. The check could be made to be:
return vma->vm_ops == &msharefs_vm_ops;
next prev parent reply other threads:[~2025-09-08 18:57 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-20 1:03 [PATCH v3 00/22] Add support for shared PTEs across processes Anthony Yznaga
2025-08-20 1:03 ` [PATCH v3 01/22] mm: Add msharefs filesystem Anthony Yznaga
2025-09-08 18:29 ` Liam R. Howlett
2025-09-08 19:09 ` Anthony Yznaga
2025-09-10 12:14 ` Pedro Falcato
2025-09-10 12:46 ` David Hildenbrand
2025-08-20 1:03 ` [PATCH v3 02/22] mm/mshare: pre-populate msharefs with information file Anthony Yznaga
2025-08-20 1:03 ` [PATCH v3 03/22] mm/mshare: make msharefs writable and support directories Anthony Yznaga
2025-08-20 1:03 ` [PATCH v3 04/22] mm/mshare: allocate an mm_struct for msharefs files Anthony Yznaga
2025-08-20 1:03 ` [PATCH v3 05/22] mm/mshare: add ways to set the size of an mshare region Anthony Yznaga
2025-08-20 1:03 ` [PATCH v3 06/22] mm/mshare: Add a vma flag to indicate " Anthony Yznaga
2025-09-08 18:45 ` David Hildenbrand
2025-09-08 18:56 ` Anthony Yznaga [this message]
2025-09-08 19:02 ` David Hildenbrand
2025-09-08 19:03 ` Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 07/22] mm/mshare: Add mmap support Anthony Yznaga
2025-08-20 19:02 ` kernel test robot
2025-08-20 1:04 ` [PATCH v3 08/22] mm/mshare: flush all TLBs when updating PTEs in an mshare range Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 09/22] sched/numa: do not scan msharefs vmas Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 10/22] mm: add mmap_read_lock_killable_nested() Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 11/22] mm: add and use unmap_page_range vm_ops hook Anthony Yznaga
2025-08-21 15:40 ` kernel test robot
2025-08-20 1:04 ` [PATCH v3 12/22] mm: introduce PUD page table shared count Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 13/22] mm/mshare: prepare for page table sharing support Anthony Yznaga
2025-09-15 15:27 ` Lorenzo Stoakes
2025-08-20 1:04 ` [PATCH v3 14/22] x86/mm: enable page table sharing Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 15/22] mm: create __do_mmap() to take an mm_struct * arg Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 16/22] mm: pass the mm in vma_munmap_struct Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 17/22] sched/mshare: mshare ownership Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 18/22] mm/mshare: Add an ioctl for mapping objects in an mshare region Anthony Yznaga
2025-08-20 20:36 ` kernel test robot
2025-08-20 1:04 ` [PATCH v3 19/22] mm/mshare: Add an ioctl for unmapping " Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 20/22] mm/mshare: support mapping files and anon hugetlb " Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 21/22] mm/mshare: provide a way to identify an mm as an mshare host mm Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 22/22] mm/mshare: charge fault handling allocations to the mshare owner Anthony Yznaga
2025-09-08 18:50 ` David Hildenbrand
2025-09-08 19:21 ` Anthony Yznaga
2025-09-08 20:28 ` David Hildenbrand
2025-09-08 20:55 ` Anthony Yznaga
2025-09-08 20:32 ` [PATCH v3 00/22] Add support for shared PTEs across processes David Hildenbrand
2025-09-08 20:59 ` Matthew Wilcox
2025-09-08 21:14 ` Anthony Yznaga
2025-09-09 7:53 ` David Hildenbrand
2025-09-09 18:29 ` Anthony Yznaga
2025-09-09 19:06 ` Lorenzo Stoakes
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