From: Christoph Hellwig <hch@lst.de>
To: Joao Martins <joao.m.martins@oracle.com>
Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
Dan Williams <dan.j.williams@intel.com>,
Vishal Verma <vishal.l.verma@intel.com>,
Dave Jiang <dave.jiang@intel.com>,
Naoya Horiguchi <naoya.horiguchi@nec.com>,
Matthew Wilcox <willy@infradead.org>,
Jason Gunthorpe <jgg@ziepe.ca>,
John Hubbard <jhubbard@nvidia.com>,
Jane Chu <jane.chu@oracle.com>,
Muchun Song <songmuchun@bytedance.com>,
Mike Kravetz <mike.kravetz@oracle.com>,
Jonathan Corbet <corbet@lwn.net>, Christoph Hellwig <hch@lst.de>,
nvdimm@lists.linux.dev, linux-doc@vger.kernel.org
Subject: Re: [PATCH v6 09/10] device-dax: set mapping prior to vmf_insert_pfn{,_pmd,pud}()
Date: Mon, 29 Nov 2021 08:32:35 +0100 [thread overview]
Message-ID: <20211129073235.GA23843@lst.de> (raw)
In-Reply-To: <96b53b3c-5c18-5f93-c595-a7d509d58f92@oracle.com>
On Fri, Nov 26, 2021 at 06:39:39PM +0000, Joao Martins wrote:
> @@ -230,23 +235,18 @@ static vm_fault_t dev_dax_huge_fault(struct vm_fault *vmf,
> id = dax_read_lock();
> switch (pe_size) {
> case PE_SIZE_PTE:
> - fault_size = PAGE_SIZE;
> rc = __dev_dax_pte_fault(dev_dax, vmf, &pfn);
> break;
> case PE_SIZE_PMD:
> - fault_size = PMD_SIZE;
> rc = __dev_dax_pmd_fault(dev_dax, vmf, &pfn);
> break;
> case PE_SIZE_PUD:
> - fault_size = PUD_SIZE;
> rc = __dev_dax_pud_fault(dev_dax, vmf, &pfn);
> break;
> default:
> rc = VM_FAULT_SIGBUS;
> }
>
> dax_read_unlock(id);
I wonder if if would make sense to move dax_read_lock / dax_read_unlock
іnto the individul helpers as well now. That way you could directly
return from the switch. Aso it seems like pfn is only an input
parameter now and doesn't need to be passed by reference.
next prev parent reply other threads:[~2021-11-29 7:33 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-24 19:09 [PATCH v6 00/10] mm, device-dax: Introduce compound pages in devmap Joao Martins
2021-11-24 19:09 ` [PATCH v6 01/10] memory-failure: fetch compound_head after pgmap_pfn_valid() Joao Martins
2021-11-24 19:09 ` [PATCH v6 02/10] mm/page_alloc: split prep_compound_page into head and tail subparts Joao Martins
2021-11-24 19:09 ` [PATCH v6 03/10] mm/page_alloc: refactor memmap_init_zone_device() page init Joao Martins
2021-11-24 19:09 ` [PATCH v6 04/10] mm/memremap: add ZONE_DEVICE support for compound pages Joao Martins
2021-11-25 6:11 ` Christoph Hellwig
2021-11-25 11:35 ` Joao Martins
2021-11-24 19:10 ` [PATCH v6 05/10] device-dax: use ALIGN() for determining pgoff Joao Martins
2021-11-24 19:10 ` [PATCH v6 06/10] device-dax: use struct_size() Joao Martins
2021-11-24 19:10 ` [PATCH v6 07/10] device-dax: ensure dev_dax->pgmap is valid for dynamic devices Joao Martins
2021-11-24 19:10 ` [PATCH v6 08/10] device-dax: factor out page mapping initialization Joao Martins
2021-11-24 19:10 ` [PATCH v6 09/10] device-dax: set mapping prior to vmf_insert_pfn{,_pmd,pud}() Joao Martins
2021-11-25 11:42 ` Joao Martins
2021-11-26 18:39 ` Joao Martins
2021-11-29 7:32 ` Christoph Hellwig [this message]
2021-11-29 15:49 ` Joao Martins
2021-11-29 16:48 ` Christoph Hellwig
2021-11-29 17:20 ` Joao Martins
2021-11-24 19:10 ` [PATCH v6 10/10] device-dax: compound devmap support Joao Martins
2021-11-24 22:30 ` [PATCH v6 00/10] mm, device-dax: Introduce compound pages in devmap Dan Williams
2021-11-24 22:41 ` Andrew Morton
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