From patchwork Thu Sep 2 21:52:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 12472731 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 41BDEC43219 for ; Thu, 2 Sep 2021 21:52:38 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id EF6F6610E5 for ; Thu, 2 Sep 2021 21:52:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org EF6F6610E5 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 968296B0075; Thu, 2 Sep 2021 17:52:37 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 8F03F6B0080; Thu, 2 Sep 2021 17:52:37 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7DE2A8D0001; Thu, 2 Sep 2021 17:52:37 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0235.hostedemail.com [216.40.44.235]) by kanga.kvack.org (Postfix) with ESMTP id 6BC2C6B009B for ; Thu, 2 Sep 2021 17:52:37 -0400 (EDT) Received: from smtpin27.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 317C682F4BD5 for ; Thu, 2 Sep 2021 21:52:37 +0000 (UTC) X-FDA: 78543983154.27.9EC5503 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf26.hostedemail.com (Postfix) with ESMTP id D69B820019C3 for ; Thu, 2 Sep 2021 21:52:36 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id AE392610D2; Thu, 2 Sep 2021 21:52:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1630619556; bh=XZ+bHz0uM2hq27Dx7lu+N3xtxGPzShoGUKvsqm1BGfY=; h=Date:From:To:Subject:In-Reply-To:From; b=w1yv5zirTliw9FB1q7dDSytK9xZF0Xt7FNYZuqooLNhqJagaaZRNwxgNSIk7T+/bJ SLyWDQg7L41L8x8cvLoKT7GjM9Shya1guNr4rXpd7WAQcD2E95gRDfl+bTv06a3yrf toHnUCEXk+Y+oaUcOgZuDmCHatDV+hk5RisfLkgY= Date: Thu, 02 Sep 2021 14:52:35 -0700 From: Andrew Morton To: akpm@linux-foundation.org, aneesh.kumar@linux.ibm.com, anshuman.khandual@arm.com, cai@lca.pw, catalin.marinas@arm.com, christophe.leroy@csgroup.eu, chuhu@redhat.com, gerald.schaefer@linux.ibm.com, gshan@redhat.com, linux-mm@kvack.org, mm-commits@vger.kernel.org, torvalds@linux-foundation.org, vgupta@synopsys.com, will@kernel.org Subject: [patch 049/212] mm/debug_vm_pgtable: use struct pgtable_debug_args in migration and thp tests Message-ID: <20210902215235.LFGx--K0l%akpm@linux-foundation.org> In-Reply-To: <20210902144820.78957dff93d7bea620d55a89@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Rspamd-Queue-Id: D69B820019C3 Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=w1yv5zir; dmarc=none; spf=pass (imf26.hostedemail.com: domain of akpm@linux-foundation.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org X-Rspamd-Server: rspam01 X-Stat-Signature: xngrqcjjtg8x4ofjp7m6y1gxnjx3wsbm X-HE-Tag: 1630619556-768471 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Gavin Shan Subject: mm/debug_vm_pgtable: use struct pgtable_debug_args in migration and thp tests This uses struct pgtable_debug_args in the migration and thp test functions. It's notable that the pre-allocated page is used in swap_migration_tests() as set_pte_at() is used there. Link: https://lkml.kernel.org/r/20210809092631.1888748-7-gshan@redhat.com Signed-off-by: Gavin Shan Reviewed-by: Anshuman Khandual Tested-by: Christophe Leroy [powerpc 8xx] Tested-by: Gerald Schaefer [s390] Cc: Aneesh Kumar K.V Cc: Catalin Marinas Cc: Chunyu Hu Cc: Qian Cai Cc: Vineet Gupta Cc: Will Deacon Signed-off-by: Andrew Morton --- mm/debug_vm_pgtable.c | 36 +++++++++++++++++------------------- 1 file changed, 17 insertions(+), 19 deletions(-) --- a/mm/debug_vm_pgtable.c~mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-migration-and-thp-tests +++ a/mm/debug_vm_pgtable.c @@ -845,7 +845,7 @@ static void __init pmd_swap_tests(struct static void __init pmd_swap_tests(struct pgtable_debug_args *args) { } #endif /* CONFIG_ARCH_ENABLE_THP_MIGRATION */ -static void __init swap_migration_tests(void) +static void __init swap_migration_tests(struct pgtable_debug_args *args) { struct page *page; swp_entry_t swp; @@ -853,19 +853,18 @@ static void __init swap_migration_tests( if (!IS_ENABLED(CONFIG_MIGRATION)) return; - pr_debug("Validating swap migration\n"); /* * swap_migration_tests() requires a dedicated page as it needs to * be locked before creating a migration entry from it. Locking the * page that actually maps kernel text ('start_kernel') can be real - * problematic. Lets allocate a dedicated page explicitly for this - * purpose that will be freed subsequently. + * problematic. Lets use the allocated page explicitly for this + * purpose. */ - page = alloc_page(GFP_KERNEL); - if (!page) { - pr_err("page allocation failed\n"); + page = (args->pte_pfn != ULONG_MAX) ? pfn_to_page(args->pte_pfn) : NULL; + if (!page) return; - } + + pr_debug("Validating swap migration\n"); /* * make_migration_entry() expects given page to be @@ -884,7 +883,6 @@ static void __init swap_migration_tests( WARN_ON(!is_migration_entry(swp)); WARN_ON(is_writable_migration_entry(swp)); __ClearPageLocked(page); - __free_page(page); } #ifdef CONFIG_HUGETLB_PAGE @@ -916,7 +914,7 @@ static void __init hugetlb_basic_tests(s #endif /* CONFIG_HUGETLB_PAGE */ #ifdef CONFIG_TRANSPARENT_HUGEPAGE -static void __init pmd_thp_tests(unsigned long pfn, pgprot_t prot) +static void __init pmd_thp_tests(struct pgtable_debug_args *args) { pmd_t pmd; @@ -935,7 +933,7 @@ static void __init pmd_thp_tests(unsigne * needs to return true. pmd_present() should be true whenever * pmd_trans_huge() returns true. */ - pmd = pfn_pmd(pfn, prot); + pmd = pfn_pmd(args->fixed_pmd_pfn, args->page_prot); WARN_ON(!pmd_trans_huge(pmd_mkhuge(pmd))); #ifndef __HAVE_ARCH_PMDP_INVALIDATE @@ -945,7 +943,7 @@ static void __init pmd_thp_tests(unsigne } #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD -static void __init pud_thp_tests(unsigned long pfn, pgprot_t prot) +static void __init pud_thp_tests(struct pgtable_debug_args *args) { pud_t pud; @@ -953,7 +951,7 @@ static void __init pud_thp_tests(unsigne return; pr_debug("Validating PUD based THP\n"); - pud = pfn_pud(pfn, prot); + pud = pfn_pud(args->fixed_pud_pfn, args->page_prot); WARN_ON(!pud_trans_huge(pud_mkhuge(pud))); /* @@ -965,11 +963,11 @@ static void __init pud_thp_tests(unsigne */ } #else /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */ -static void __init pud_thp_tests(unsigned long pfn, pgprot_t prot) { } +static void __init pud_thp_tests(struct pgtable_debug_args *args) { } #endif /* CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */ #else /* !CONFIG_TRANSPARENT_HUGEPAGE */ -static void __init pmd_thp_tests(unsigned long pfn, pgprot_t prot) { } -static void __init pud_thp_tests(unsigned long pfn, pgprot_t prot) { } +static void __init pmd_thp_tests(struct pgtable_debug_args *args) { } +static void __init pud_thp_tests(struct pgtable_debug_args *args) { } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ static unsigned long __init get_random_vaddr(void) @@ -1335,10 +1333,10 @@ static int __init debug_vm_pgtable(void) pte_swap_tests(&args); pmd_swap_tests(&args); - swap_migration_tests(); + swap_migration_tests(&args); - pmd_thp_tests(pmd_aligned, prot); - pud_thp_tests(pud_aligned, prot); + pmd_thp_tests(&args); + pud_thp_tests(&args); hugetlb_basic_tests(&args);