From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8C9ADC433E3 for ; Sat, 15 Aug 2020 22:13:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6CAD52063A for ; Sat, 15 Aug 2020 22:13:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597529585; bh=RaErheH0wBZzO3v8LJYi30xc71jA3roWtfjwy+QC7SQ=; h=Date:From:To:Subject:In-Reply-To:Reply-To:List-ID:From; b=Y4uS8zOHs70GGKTkHzSRSEH3OQwc6hsDu2XlwuEqTFNYy6AJnveo8cbC8H61ewEkG WzvpwZbo/d9amJQWC4y6weF8TB7tepvl8raKxKMUp3/9z7AiOa00sLPxbPvGS+LG7q w2VymYyItKy7brm/r+ccP72wWsgSMPnoYQzINBMY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728846AbgHOWK1 (ORCPT ); Sat, 15 Aug 2020 18:10:27 -0400 Received: from mail.kernel.org ([198.145.29.99]:41756 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728600AbgHOWKZ (ORCPT ); Sat, 15 Aug 2020 18:10:25 -0400 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1A49022C9E; Sat, 15 Aug 2020 00:30:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597451434; bh=RaErheH0wBZzO3v8LJYi30xc71jA3roWtfjwy+QC7SQ=; h=Date:From:To:Subject:In-Reply-To:From; b=fG0mKbWrUwsqFB/DdLyk7OLsCDR0T3gfWhUb2HCNYe1IYx+FOWQUjTYSOqr9X3YxV 0XbLc7EM/x9lNaNdeyauzvuPJpEVkQiHMcGHKKtniPtxnWW/ByXVziQmvVqmxnY4Kg NLD5XP2KJzz5jwrWDZfy9lYGh2rKrvxtj6dnqmbw= Date: Fri, 14 Aug 2020 17:30:33 -0700 From: Andrew Morton To: akpm@linux-foundation.org, david@redhat.com, kirill.shutemov@linux.intel.com, linux-mm@kvack.org, mike.kravetz@oracle.com, mm-commits@vger.kernel.org, torvalds@linux-foundation.org, william.kucharski@oracle.com, willy@infradead.org, ziy@nvidia.com Subject: [patch 10/39] mm: add thp_size Message-ID: <20200815003033.ExVW4LEAX%akpm@linux-foundation.org> In-Reply-To: <20200814172939.55d6d80b6e21e4241f1ee1f3@linux-foundation.org> User-Agent: s-nail v14.8.16 Sender: mm-commits-owner@vger.kernel.org Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org From: "Matthew Wilcox (Oracle)" Subject: mm: add thp_size This function returns the number of bytes in a THP. It is like page_size(), but compiles to just PAGE_SIZE if CONFIG_TRANSPARENT_HUGEPAGE is disabled. Link: http://lkml.kernel.org/r/20200629151959.15779-5-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: William Kucharski Reviewed-by: Zi Yan Cc: David Hildenbrand Cc: Mike Kravetz Cc: "Kirill A. Shutemov" Signed-off-by: Andrew Morton --- drivers/nvdimm/btt.c | 4 +--- drivers/nvdimm/pmem.c | 6 ++---- include/linux/huge_mm.h | 11 +++++++++++ mm/internal.h | 2 +- mm/page_io.c | 2 +- mm/page_vma_mapped.c | 4 ++-- 6 files changed, 18 insertions(+), 11 deletions(-) --- a/drivers/nvdimm/btt.c~mm-add-thp_size +++ a/drivers/nvdimm/btt.c @@ -1490,10 +1490,8 @@ static int btt_rw_page(struct block_devi { struct btt *btt = bdev->bd_disk->private_data; int rc; - unsigned int len; - len = hpage_nr_pages(page) * PAGE_SIZE; - rc = btt_do_bvec(btt, NULL, page, len, 0, op, sector); + rc = btt_do_bvec(btt, NULL, page, thp_size(page), 0, op, sector); if (rc == 0) page_endio(page, op_is_write(op), 0); --- a/drivers/nvdimm/pmem.c~mm-add-thp_size +++ a/drivers/nvdimm/pmem.c @@ -238,11 +238,9 @@ static int pmem_rw_page(struct block_dev blk_status_t rc; if (op_is_write(op)) - rc = pmem_do_write(pmem, page, 0, sector, - hpage_nr_pages(page) * PAGE_SIZE); + rc = pmem_do_write(pmem, page, 0, sector, thp_size(page)); else - rc = pmem_do_read(pmem, page, 0, sector, - hpage_nr_pages(page) * PAGE_SIZE); + rc = pmem_do_read(pmem, page, 0, sector, thp_size(page)); /* * The ->rw_page interface is subtle and tricky. The core * retries on any error, so we can only invoke page_endio() in --- a/include/linux/huge_mm.h~mm-add-thp_size +++ a/include/linux/huge_mm.h @@ -462,4 +462,15 @@ static inline bool thp_migration_support } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ +/** + * thp_size - Size of a transparent huge page. + * @page: Head page of a transparent huge page. + * + * Return: Number of bytes in this page. + */ +static inline unsigned long thp_size(struct page *page) +{ + return PAGE_SIZE << thp_order(page); +} + #endif /* _LINUX_HUGE_MM_H */ --- a/mm/internal.h~mm-add-thp_size +++ a/mm/internal.h @@ -396,7 +396,7 @@ vma_address(struct page *page, struct vm unsigned long start, end; start = __vma_address(page, vma); - end = start + PAGE_SIZE * (hpage_nr_pages(page) - 1); + end = start + thp_size(page) - PAGE_SIZE; /* page should be within @vma mapping range */ VM_BUG_ON_VMA(end < vma->vm_start || start >= vma->vm_end, vma); --- a/mm/page_io.c~mm-add-thp_size +++ a/mm/page_io.c @@ -40,7 +40,7 @@ static struct bio *get_swap_bio(gfp_t gf bio->bi_iter.bi_sector <<= PAGE_SHIFT - 9; bio->bi_end_io = end_io; - bio_add_page(bio, page, PAGE_SIZE * hpage_nr_pages(page), 0); + bio_add_page(bio, page, thp_size(page), 0); } return bio; } --- a/mm/page_vma_mapped.c~mm-add-thp_size +++ a/mm/page_vma_mapped.c @@ -227,7 +227,7 @@ next_pte: if (pvmw->address >= pvmw->vma->vm_end || pvmw->address >= __vma_address(pvmw->page, pvmw->vma) + - hpage_nr_pages(pvmw->page) * PAGE_SIZE) + thp_size(pvmw->page)) return not_found(pvmw); /* Did we cross page table boundary? */ if (pvmw->address % PMD_SIZE == 0) { @@ -268,7 +268,7 @@ int page_mapped_in_vma(struct page *page unsigned long start, end; start = __vma_address(page, vma); - end = start + PAGE_SIZE * (hpage_nr_pages(page) - 1); + end = start + thp_size(page) - PAGE_SIZE; if (unlikely(end < vma->vm_start || start >= vma->vm_end)) return 0; _