linux-kernel - Re: [PATCH v4 09/25] mm/gup.c: Remove redundant check for PCI P2PDMA page

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Message-ID: <ea6eda57-f150-47ea-97b8-fc8eeaf81bd3@redhat.com>
Date: Tue, 17 Dec 2024 23:06:25 +0100
From: David Hildenbrand <david@...hat.com>
To: Alistair Popple <apopple@...dia.com>, akpm@...ux-foundation.org,
 dan.j.williams@...el.com, linux-mm@...ck.org
Cc: lina@...hilina.net, zhang.lyra@...il.com, gerald.schaefer@...ux.ibm.com,
 vishal.l.verma@...el.com, dave.jiang@...el.com, logang@...tatee.com,
 bhelgaas@...gle.com, jack@...e.cz, jgg@...pe.ca, catalin.marinas@....com,
 will@...nel.org, mpe@...erman.id.au, npiggin@...il.com,
 dave.hansen@...ux.intel.com, ira.weiny@...el.com, willy@...radead.org,
 djwong@...nel.org, tytso@....edu, linmiaohe@...wei.com, peterx@...hat.com,
 linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org,
 nvdimm@...ts.linux.dev, linux-cxl@...r.kernel.org,
 linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
 linux-xfs@...r.kernel.org, jhubbard@...dia.com, hch@....de,
 david@...morbit.com, Jason Gunthorpe <jgg@...dia.com>
Subject: Re: [PATCH v4 09/25] mm/gup.c: Remove redundant check for PCI P2PDMA
 page

On 17.12.24 06:12, Alistair Popple wrote:
> PCI P2PDMA pages are not mapped with pXX_devmap PTEs therefore the
> check in __gup_device_huge() is redundant. Remove it
> 
> Signed-off-by: Alistair Popple <apopple@...dia.com>
> Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
> Reviewed-by: Dan Wiliams <dan.j.williams@...el.com>
> Acked-by: David Hildenbrand <david@...hat.com>
> ---

Nit: patch subject should start with "mm/gup: ...".

-- 
Cheers,

David / dhildenb