linux-kernel - Re: [PATCH 1/2] mm/page_alloc: Ensure try_alloc_pages() plays well with unaccepted memory

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Message-ID: <D9P3X0NLQMW5.1J74MJ7FDRBFB@google.com>
Date: Tue, 06 May 2025 13:20:25 +0000
From: Brendan Jackman <jackmanb@...gle.com>
To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>, <akpm@...ux-foundation.org>, 
	<vbabka@...e.cz>, <surenb@...gle.com>, <mhocko@...e.com>, 
	<hannes@...xchg.org>, <bp@...en8.de>, <tglx@...utronix.de>, 
	<david@...hat.com>
Cc: <ast@...nel.org>, <linux-mm@...ck.org>, <linux-coco@...ts.linux.dev>, 
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] mm/page_alloc: Ensure try_alloc_pages() plays well
 with unaccepted memory

On Tue May 6, 2025 at 11:25 AM UTC, Kirill A. Shutemov wrote:
> +	/* Bailout, since try_to_accept_memory_one() needs to take a lock */
> +	if (alloc_flags & ALLOC_TRYLOCK)
> +		return false;
> +

Quick lazy question: why don't we just trylock it like we do for the zone
lock?