From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9959D157A5A for ; Mon, 27 Jul 2026 12:16:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785154607; cv=none; b=sG2qUjeT7jN+/3w4gH+tP52karZRvVSKeNsr1o+0letOUOP81OhVb/rFW16Opn0q6ydGKYffbn3mhSZKfC3knx22ukjaylVgnpXjSZVM7K3paLJs5FxBJwCk7nHz/cRZTUBm8vfP9QNMFQtiBD0DWIVF5gexgNnLB0uVH3DK+gE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785154607; c=relaxed/simple; bh=67JAQ7jCEmefTBVmtadPNkIilE44u7tD2TC9uwhJuvE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=JQ/qpwKdEQp8LSkN/izg9HVrUIVXXFuMs8Cn2Yxm4MOHVTBmTvBt6elFPlP21WsvnUMZ4zgQOAVgfliTu4LFuv91epxWta7s2j2zkg5SDLGQbjUC3tICC/uj0s1aBT/qA1mAmpzCde5F/++SqPTTzDFLwMXYTqcmlkUy6p7MVBs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Q6rwu4UH; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Q6rwu4UH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BA5911F000E9; Mon, 27 Jul 2026 12:16:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785154606; bh=lIUEPpso+zQtbGUo/ufSKSePHycf4z7cdFiea0Gk3jE=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=Q6rwu4UHC4+41OOIMAqYG6j3l5cKWu8sggn2bo+CTVF4li7ddiAGnzmiBbNBdJfK9 QCMWv2rhm0eN9ws4rbTmiRHmdyWoBNHybjSmCDe67f5aS751/cNxiNhUdY6/Kvvyj+ 6k/21+MgMbtu183HUBHIDuVNZSwm+bOWxrs7MoRM7I3tWTQIcpd1RDJl4kr8w7Kbrp sg9WAXMGglCBlmFXilGthg27+qOVuYU8GK8nkcXhi4cpDgBe/+PO0yH4/t1RLh/jTn 1hGZEK0gkTtuo08NsSMTP0sucDdqm7/N32BlZQuGpvmfUzNt/4unusN1nU0EXourGC rqIbnAfnFO0XA== Message-ID: Date: Mon, 27 Jul 2026 14:16:40 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/2] mm: Extract non-swap page handling to do_non_swap_page() To: Hongfu Li Cc: akpm@linux-foundation.org, liam@infradead.org, lihongfu@kylinos.cn, linux-kernel@vger.kernel.org, linux-mm@kvack.org, ljs@kernel.org, mhocko@suse.com, rppt@kernel.org, surenb@google.com, vbabka@kernel.org References: <10c60511-c841-4bd8-aa5f-0d826b676533@kernel.org> <20260727121047.4140-1-hongfu.li@linux.dev> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 7/27/26 14:10, Hongfu Li wrote: >>> mm/memory.c | 120 ++++++++++++++++++++++++++++++---------------------- >>> 1 file changed, 69 insertions(+), 51 deletions(-) >>> >>> diff --git a/mm/memory.c b/mm/memory.c >>> index ae521baa8c84..50d8e92aef91 100644 >>> --- a/mm/memory.c >>> +++ b/mm/memory.c >>> @@ -4815,6 +4815,74 @@ static void check_swap_exclusive(struct folio *folio, swp_entry_t entry, >>> } while (--nr_pages); >>> } >>> >>> +static vm_fault_t do_non_swap_page(struct vm_fault *vmf) >> >> We're handling softleaf entries that are not swap entries. >> >> do_nonswap_softleaf() or sth like that would be better than talking about "page" >> if there is not even a page. >> >> But actually it should be the other way around: >> >> do_softleaf_entry() [currently do_swap_page] >> ... non-swap entries >> do_swap_entry() >> >> Or sth like that. Then, maybe in the future, we can just move do_swap_entry() >> out of memory.c >> >> So we're factoring the wrong thing out in this patch. > > Thank you very much for the detailed review, your analysis makes perfect sense to me. > > I'm glad to send out v3 shortly for your further review, with > do_non_swap_page renamed to do_nonswap_softleaf. Read again, that's not what I meant. -- Cheers, David