linux-kernel - Re: [PATCH v3 0/3] mm: Implement ECC handling for pfn with no struct page

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Date: Fri, 24 Oct 2025 11:16:34 +0000
From: Ankit Agrawal <ankita@...dia.com>
To: Jason Gunthorpe <jgg@...dia.com>, "Liam R. Howlett"
	<Liam.Howlett@...cle.com>, Aniket Agashe <aniketa@...dia.com>, Vikram Sethi
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Subject: Re: [PATCH v3 0/3] mm: Implement ECC handling for pfn with no struct
 page

>>
>> Ah, I see.  Seems like a worthy addition to the commit message?  I mean,
>> this is really a choice of throwing away memory for the benefit of tlb
>> performance.  Seems like a valid choice in your usecase but less so for
>> the average laptop.
>
> No memory is being thrown away, the choice is if the kernel will
> protect itself from loading via userspace issuing repeated reads to
> bad memory.
>
> Ankit please include some of these details in the commit message

Thanks Jason, Liam for the suggestion. I'll update the commit message
in the next version.