From: Jason Gunthorpe <jgg@ziepe.ca>
To: Peter Xu <peterx@redhat.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Matthew Wilcox <willy@infradead.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Kirill Tkhai <ktkhai@virtuozzo.com>,
Mike Rapoport <rppt@linux.vnet.ibm.com>,
David Gibson <david@gibson.dropbear.id.au>,
Kirill Shutemov <kirill@shutemov.name>,
Christoph Hellwig <hch@lst.de>, Miaohe Lin <linmiaohe@huawei.com>,
Gal Pressman <galpress@amazon.com>, Jann Horn <jannh@google.com>,
Jan Kara <jack@suse.cz>, Wei Zhang <wzam@amazon.com>,
Mike Kravetz <mike.kravetz@oracle.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
VMware Graphics <linux-graphics-maintainer@vmware.com>,
Roland Scheidegger <sroland@vmware.com>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Alexey Dobriyan <adobriyan@gmail.com>
Subject: Re: [PATCH v4 4/5] mm: Use is_cow_mapping() across tree where proper
Date: Tue, 9 Feb 2021 13:46:01 -0400 [thread overview]
Message-ID: <20210209174601.GJ4718@ziepe.ca> (raw)
In-Reply-To: <20210209030229.84991-5-peterx@redhat.com>
On Mon, Feb 08, 2021 at 10:02:28PM -0500, Peter Xu wrote:
> diff --git a/mm/hugetlb.c b/mm/hugetlb.c
> index 71ccec5c3817..620700f05ff4 100644
> --- a/mm/hugetlb.c
> +++ b/mm/hugetlb.c
> @@ -3733,15 +3733,13 @@ int copy_hugetlb_page_range(struct mm_struct *dst, struct mm_struct *src,
> pte_t *src_pte, *dst_pte, entry, dst_entry;
> struct page *ptepage;
> unsigned long addr;
> - int cow;
> + int cow = is_cow_mapping(vma->vm_flags);
int should be bool
Otherwise looks fine to me
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Jason
next prev parent reply other threads:[~2021-02-09 17:46 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-09 3:02 [PATCH v4 0/5] mm/hugetlb: Early cow on fork, and a few cleanups Peter Xu
2021-02-09 3:02 ` [PATCH v4 1/5] hugetlb: Dedup the code to add a new file_region Peter Xu
2021-02-09 3:02 ` [PATCH v4 2/5] hugetlg: Break earlier in add_reservation_in_range() when we can Peter Xu
2021-02-09 3:02 ` [PATCH v4 3/5] mm: Introduce page_needs_cow_for_dma() for deciding whether cow Peter Xu
2021-02-09 17:40 ` Jason Gunthorpe
2021-02-09 3:02 ` [PATCH v4 4/5] mm: Use is_cow_mapping() across tree where proper Peter Xu
2021-02-09 17:46 ` Jason Gunthorpe [this message]
2021-02-09 3:02 ` [PATCH v4 5/5] hugetlb: Do early cow when page pinned on src mm Peter Xu
2021-02-09 17:54 ` Jason Gunthorpe
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