linux-kernel - Re: [PATCH] mm: limit THP alignment – performance gain observed in AI inference workloads

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Message-ID: <b89b86a8-adf1-4669-a67f-da1377c220b0@suse.cz>
Date: Mon, 28 Jul 2025 13:00:02 +0200
From: Vlastimil Babka <vbabka@...e.cz>
To: Dev Jain <dev.jain@....com>, Lorenzo Stoakes
 <lorenzo.stoakes@...cle.com>, siddhartha@...ip.in
Cc: Zi Yan <ziy@...dia.com>, "linux-mm@...ck.org" <linux-mm@...ck.org>,
 LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm: limit THP alignment – performance gain observed in AI inference workloads

On 7/28/25 07:41, siddhartha@...ip.in wrote:
> On 2025-07-07 14:26, Vlastimil Babka wrote:
> Hi Lorenzo, Dev, Mel,
> 
> I'm following up on this patch submission from earlier this month:
> "[PATCH] mm: limit THP alignment – performance gain observed in AI 
> inference workloads."

I'm confused. That wasn't a patch submission, but reporting performance
results for my patch from late 2024? (and thanks for those!)

The patch was also already merged in late 2024:

commit d4148aeab412432bf928f311eca8a2ba52bb05df
Author: Vlastimil Babka <vbabka@...e.cz>
Date:   Thu Oct 24 17:12:29 2024 +0200

    mm, mmap: limit THP alignment of anonymous mappings to PMD-aligned sizes


So there's nothing more to do here AFAIK.