Re: [PATCH v6 7/8] fs/proc/task_mmu: read proc/pid/maps under per-vma lock

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To: Vlastimil Babka <vbabka@xxxxxxx>
Subject: Re: [PATCH v6 7/8] fs/proc/task_mmu: read proc/pid/maps under per-vma lock
From: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx>
Date: Tue, 15 Jul 2025 11:51:50 +0100
Cc: David Hildenbrand <david@xxxxxxxxxx>, Suren Baghdasaryan <surenb@xxxxxxxxxx>, "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>, akpm@xxxxxxxxxxxxxxxxxxxx, peterx@xxxxxxxxxx, jannh@xxxxxxxxxx, hannes@xxxxxxxxxxx, mhocko@xxxxxxxxxx, paulmck@xxxxxxxxxx, shuah@xxxxxxxxxx, adobriyan@xxxxxxxxx, brauner@xxxxxxxxxx, josef@xxxxxxxxxxxxxx, yebin10@xxxxxxxxxx, linux@xxxxxxxxxxxxxx, willy@xxxxxxxxxxxxx, osalvador@xxxxxxx, andrii@xxxxxxxxxx, ryan.roberts@xxxxxxx, christophe.leroy@xxxxxxxxxx, tjmercier@xxxxxxxxxx, kaleshsingh@xxxxxxxxxx, aha310510@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-kselftest@xxxxxxxxxxxxxxx
In-reply-to: <5f8d3100-a0dd-4da3-8797-f097e063ca97@lucifer.local>

On Tue, Jul 15, 2025 at 11:31:23AM +0100, Lorenzo Stoakes wrote:
> Or we could just sling in a cheeky spinlock

As politely pointed out to me by Vlasta off-list s/spinlock/mutex/ since we
apparently allocate for anon_vma_name :'(.

References:
- Re: [PATCH v6 7/8] fs/proc/task_mmu: read proc/pid/maps under per-vma lock
  - From: Suren Baghdasaryan
- Re: [PATCH v6 7/8] fs/proc/task_mmu: read proc/pid/maps under per-vma lock
  - From: Liam R. Howlett
- Re: [PATCH v6 7/8] fs/proc/task_mmu: read proc/pid/maps under per-vma lock
  - From: Suren Baghdasaryan
- Re: [PATCH v6 7/8] fs/proc/task_mmu: read proc/pid/maps under per-vma lock
  - From: Suren Baghdasaryan
- Re: [PATCH v6 7/8] fs/proc/task_mmu: read proc/pid/maps under per-vma lock
  - From: Suren Baghdasaryan
- Re: [PATCH v6 7/8] fs/proc/task_mmu: read proc/pid/maps under per-vma lock
  - From: Vlastimil Babka
- Re: [PATCH v6 7/8] fs/proc/task_mmu: read proc/pid/maps under per-vma lock
  - From: Lorenzo Stoakes
- Re: [PATCH v6 7/8] fs/proc/task_mmu: read proc/pid/maps under per-vma lock
  - From: David Hildenbrand
- Re: [PATCH v6 7/8] fs/proc/task_mmu: read proc/pid/maps under per-vma lock
  - From: Vlastimil Babka
- Re: [PATCH v6 7/8] fs/proc/task_mmu: read proc/pid/maps under per-vma lock
  - From: Lorenzo Stoakes

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