linux-kernel - Re: [PATCH 1/4] mm/huge_memory: add new_order and offset to split_huge_pages*() pr

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Message-ID: <397d61dd-c682-416f-8f12-64f1ff9f84f1@lucifer.local>
Date: Wed, 6 Aug 2025 17:51:46 +0100
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Zi Yan <ziy@...dia.com>
Cc: David Hildenbrand <david@...hat.com>, linux-mm@...ck.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        "Liam R. Howlett" <Liam.Howlett@...cle.com>,
        Nico Pache <npache@...hat.com>, Ryan Roberts <ryan.roberts@....com>,
        Dev Jain <dev.jain@....com>, Barry Song <baohua@...nel.org>,
        Vlastimil Babka <vbabka@...e.cz>, Mike Rapoport <rppt@...nel.org>,
        Suren Baghdasaryan <surenb@...gle.com>, Michal Hocko <mhocko@...e.com>,
        Shuah Khan <shuah@...nel.org>, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Subject: Re: [PATCH 1/4] mm/huge_memory: add new_order and offset to
 split_huge_pages*() pr_debug.

On Tue, Aug 05, 2025 at 10:20:42PM -0400, Zi Yan wrote:
> They are useful information for debugging split huge page tests.
>
> Signed-off-by: Zi Yan <ziy@...dia.com>

Seems reasonable, so:

Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>

> ---
>  mm/huge_memory.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/mm/huge_memory.c b/mm/huge_memory.c
> index 2b4ea5a2ce7d..8a11c2d402d4 100644
> --- a/mm/huge_memory.c
> +++ b/mm/huge_memory.c
> @@ -4327,8 +4327,8 @@ static int split_huge_pages_pid(int pid, unsigned long vaddr_start,
>  		goto out;
>  	}
>
> -	pr_debug("Split huge pages in pid: %d, vaddr: [0x%lx - 0x%lx]\n",
> -		 pid, vaddr_start, vaddr_end);
> +	pr_debug("Split huge pages in pid: %d, vaddr: [0x%lx - 0x%lx], new_order: %u, in_folio_offset %ld\n",
> +		 pid, vaddr_start, vaddr_end, new_order, in_folio_offset);
>
>  	mmap_read_lock(mm);
>  	/*
> --
> 2.47.2
>