linux-kernel - Re: [PATCH v3 18/35] mm: create new codetag references during page splitting

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Message-ID: <2e26bdf7-a793-4386-bcc1-5b1c7a0405b3@suse.cz>
Date: Fri, 16 Feb 2024 15:33:24 +0100
From: Vlastimil Babka <vbabka@...e.cz>
To: Suren Baghdasaryan <surenb@...gle.com>, akpm@...ux-foundation.org
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Subject: Re: [PATCH v3 18/35] mm: create new codetag references during page
 splitting

On 2/12/24 22:39, Suren Baghdasaryan wrote:
> When a high-order page is split into smaller ones, each newly split
> page should get its codetag. The original codetag is reused for these
> pages but it's recorded as 0-byte allocation because original codetag
> already accounts for the original high-order allocated page.

Wouldn't it be possible to adjust the original's accounted size and
redistribute to the split pages for more accuracy?