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

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Message-ID: <CAJuCfpGUH9DNEzfDrt5O0z8T2oAfsJ7-RTTN2CGUqwA+m3g6_w@mail.gmail.com>
Date: Fri, 16 Feb 2024 08:46:47 -0800
From: Suren Baghdasaryan <surenb@...gle.com>
To: Vlastimil Babka <vbabka@...e.cz>
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Subject: Re: [PATCH v3 18/35] mm: create new codetag references during page splitting

On Fri, Feb 16, 2024 at 6:33 AM Vlastimil Babka <vbabka@...e.cz> wrote:
>
> 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?

I can't recall why I didn't do it that way but I'll try to change and
see if something non-obvious comes up. Thanks!

>