Thread (18 messages) 18 messages, 5 authors, 2025-01-14

Re: [PATCH v2 1/4] mm: Set folio swapbacked iff folios are dirty in try_to_unmap_one

From: David Hildenbrand <hidden>
Date: 2025-01-13 13:21:07
Also in: linux-mm, linux-riscv, lkml

On 13.01.25 14:19, David Hildenbrand wrote:
On 13.01.25 04:38, Barry Song wrote:
quoted
From: Barry Song <redacted>

The refcount may be temporarily or long-term increased, but this does
not change the fundamental nature of the folio already being lazy-
freed. Therefore, we only reset 'swapbacked' when we are certain the
folio is dirty and not droppable.

Suggested-by: David Hildenbrand <redacted>
Signed-off-by: Barry Song <redacted>
---
Acked-by: David Hildenbrand <redacted>
Ah, should this have a Fixes: ?

Because of a speculative reference, we might not reclaim MADV_FREE 
folios as we silently mark them as swapbacked again, which sounds fairly 
wrong.

-- 
Cheers,

David / dhildenb

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