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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 45E0FC433F5 for ; Fri, 25 Mar 2022 01:09:49 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D050C8D0006; Thu, 24 Mar 2022 21:09:48 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id CB3998D0001; Thu, 24 Mar 2022 21:09:48 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B79EC8D0006; Thu, 24 Mar 2022 21:09:48 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0147.hostedemail.com [216.40.44.147]) by kanga.kvack.org (Postfix) with ESMTP id A90EE8D0001 for ; Thu, 24 Mar 2022 21:09:48 -0400 (EDT) Received: from smtpin27.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 5E546A230D for ; Fri, 25 Mar 2022 01:09:48 +0000 (UTC) X-FDA: 79281126456.27.258440D Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by imf27.hostedemail.com (Postfix) with ESMTP id C78A240018 for ; Fri, 25 Mar 2022 01:09:47 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id A0333B82708; Fri, 25 Mar 2022 01:09:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5DB90C340F1; Fri, 25 Mar 2022 01:09:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1648170584; bh=VCfBKXPCX8Qv+RGaF635bQP4aqqslaKYcYiux2j4CXo=; h=Date:To:From:In-Reply-To:Subject:From; b=pBy3WZkGqZZtbdWVN87TzS1OqYnSIJq/FRgaabWTX7sn2EpHrpkzYvk0CGP/QKNfu TIJspIjp4hS4WJ7eEQeZ2sWhnc0u9ko8Q6AFTaDBaJtLIZSIvuCKQY1DIPLYgqOIy1 7q6CIxGhF8fJN3MD2Xarv0oluEpvMJqK8GleV+v4= Date: Thu, 24 Mar 2022 18:09:43 -0700 To: shuah@kernel.org,rppt@linux.ibm.com,aneesh.kumar@linux.ibm.com,akpm@linux-foundation.org,patches@lists.linux.dev,linux-mm@kvack.org,mm-commits@vger.kernel.org,torvalds@linux-foundation.org,akpm@linux-foundation.org From: Andrew Morton In-Reply-To: <20220324180758.96b1ac7e17675d6bc474485e@linux-foundation.org> Subject: [patch 023/114] selftest/vm: add util.h and and move helper functions there Message-Id: <20220325010944.5DB90C340F1@smtp.kernel.org> Authentication-Results: imf27.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=pBy3WZkG; spf=pass (imf27.hostedemail.com: domain of akpm@linux-foundation.org designates 145.40.68.75 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: C78A240018 X-Stat-Signature: 8e7zg499x79n83iq89buexusjsbkfyux X-HE-Tag: 1648170587-74218 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: "Aneesh Kumar K.V" Subject: selftest/vm: add util.h and and move helper functions there Avoid code duplication by adding util.h. No functional change in this patch. Link: https://lkml.kernel.org/r/20220307054355.149820-1-aneesh.kumar@linux.ibm.com Signed-off-by: Aneesh Kumar K.V Cc: Shuah Khan Cc: Mike Rapoport Signed-off-by: Andrew Morton --- tools/testing/selftests/vm/ksm_tests.c | 38 ------------ tools/testing/selftests/vm/transhuge-stress.c | 41 +------------ tools/testing/selftests/vm/util.h | 48 ++++++++++++++++ 3 files changed, 52 insertions(+), 75 deletions(-) --- a/tools/testing/selftests/vm/ksm_tests.c~selftest-vm-add-utilh-and-and-move-helper-functions-there +++ a/tools/testing/selftests/vm/ksm_tests.c @@ -12,6 +12,7 @@ #include "../kselftest.h" #include "../../../../include/vdso/time64.h" +#include "util.h" #define KSM_SYSFS_PATH "/sys/kernel/mm/ksm/" #define KSM_FP(s) (KSM_SYSFS_PATH s) @@ -22,15 +23,6 @@ #define KSM_MERGE_ACROSS_NODES_DEFAULT true #define MB (1ul << 20) -#define PAGE_SHIFT 12 -#define HPAGE_SHIFT 21 - -#define PAGE_SIZE (1 << PAGE_SHIFT) -#define HPAGE_SIZE (1 << HPAGE_SHIFT) - -#define PAGEMAP_PRESENT(ent) (((ent) & (1ull << 63)) != 0) -#define PAGEMAP_PFN(ent) ((ent) & ((1ull << 55) - 1)) - struct ksm_sysfs { unsigned long max_page_sharing; unsigned long merge_across_nodes; @@ -456,34 +448,6 @@ err_out: return KSFT_FAIL; } -int64_t allocate_transhuge(void *ptr, int pagemap_fd) -{ - uint64_t ent[2]; - - /* drop pmd */ - if (mmap(ptr, HPAGE_SIZE, PROT_READ | PROT_WRITE, - MAP_FIXED | MAP_ANONYMOUS | - MAP_NORESERVE | MAP_PRIVATE, -1, 0) != ptr) - errx(2, "mmap transhuge"); - - if (madvise(ptr, HPAGE_SIZE, MADV_HUGEPAGE)) - err(2, "MADV_HUGEPAGE"); - - /* allocate transparent huge page */ - *(volatile void **)ptr = ptr; - - if (pread(pagemap_fd, ent, sizeof(ent), - (uintptr_t)ptr >> (PAGE_SHIFT - 3)) != sizeof(ent)) - err(2, "read pagemap"); - - if (PAGEMAP_PRESENT(ent[0]) && PAGEMAP_PRESENT(ent[1]) && - PAGEMAP_PFN(ent[0]) + 1 == PAGEMAP_PFN(ent[1]) && - !(PAGEMAP_PFN(ent[0]) & ((1 << (HPAGE_SHIFT - PAGE_SHIFT)) - 1))) - return PAGEMAP_PFN(ent[0]); - - return -1; -} - static int ksm_merge_hugepages_time(int mapping, int prot, int timeout, size_t map_size) { void *map_ptr, *map_ptr_orig; --- a/tools/testing/selftests/vm/transhuge-stress.c~selftest-vm-add-utilh-and-and-move-helper-functions-there +++ a/tools/testing/selftests/vm/transhuge-stress.c @@ -15,48 +15,12 @@ #include #include #include +#include "util.h" -#define PAGE_SHIFT 12 -#define HPAGE_SHIFT 21 - -#define PAGE_SIZE (1 << PAGE_SHIFT) -#define HPAGE_SIZE (1 << HPAGE_SHIFT) - -#define PAGEMAP_PRESENT(ent) (((ent) & (1ull << 63)) != 0) -#define PAGEMAP_PFN(ent) ((ent) & ((1ull << 55) - 1)) - -int pagemap_fd; int backing_fd = -1; int mmap_flags = MAP_ANONYMOUS | MAP_NORESERVE | MAP_PRIVATE; #define PROT_RW (PROT_READ | PROT_WRITE) -int64_t allocate_transhuge(void *ptr) -{ - uint64_t ent[2]; - - /* drop pmd */ - if (mmap(ptr, HPAGE_SIZE, PROT_RW, MAP_FIXED | mmap_flags, - backing_fd, 0) != ptr) - errx(2, "mmap transhuge"); - - if (madvise(ptr, HPAGE_SIZE, MADV_HUGEPAGE)) - err(2, "MADV_HUGEPAGE"); - - /* allocate transparent huge page */ - *(volatile void **)ptr = ptr; - - if (pread(pagemap_fd, ent, sizeof(ent), - (uintptr_t)ptr >> (PAGE_SHIFT - 3)) != sizeof(ent)) - err(2, "read pagemap"); - - if (PAGEMAP_PRESENT(ent[0]) && PAGEMAP_PRESENT(ent[1]) && - PAGEMAP_PFN(ent[0]) + 1 == PAGEMAP_PFN(ent[1]) && - !(PAGEMAP_PFN(ent[0]) & ((1 << (HPAGE_SHIFT - PAGE_SHIFT)) - 1))) - return PAGEMAP_PFN(ent[0]); - - return -1; -} - int main(int argc, char **argv) { size_t ram, len; @@ -67,6 +31,7 @@ int main(int argc, char **argv) double s; uint8_t *map; size_t map_len; + int pagemap_fd; ram = sysconf(_SC_PHYS_PAGES); if (ram > SIZE_MAX / sysconf(_SC_PAGESIZE) / 4) @@ -122,7 +87,7 @@ int main(int argc, char **argv) for (p = ptr; p < ptr + len; p += HPAGE_SIZE) { int64_t pfn; - pfn = allocate_transhuge(p); + pfn = allocate_transhuge(p, pagemap_fd); if (pfn < 0) { nr_failed++; --- /dev/null +++ a/tools/testing/selftests/vm/util.h @@ -0,0 +1,48 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __KSELFTEST_VM_UTIL_H +#define __KSELFTEST_VM_UTIL_H + +#include +#include +#include + +#define PAGE_SHIFT 12 +#define HPAGE_SHIFT 21 + +#define PAGE_SIZE (1 << PAGE_SHIFT) +#define HPAGE_SIZE (1 << HPAGE_SHIFT) + +#define PAGEMAP_PRESENT(ent) (((ent) & (1ull << 63)) != 0) +#define PAGEMAP_PFN(ent) ((ent) & ((1ull << 55) - 1)) + + +static inline int64_t allocate_transhuge(void *ptr, int pagemap_fd) +{ + uint64_t ent[2]; + + /* drop pmd */ + if (mmap(ptr, HPAGE_SIZE, PROT_READ | PROT_WRITE, + MAP_FIXED | MAP_ANONYMOUS | + MAP_NORESERVE | MAP_PRIVATE, -1, 0) != ptr) + errx(2, "mmap transhuge"); + + if (madvise(ptr, HPAGE_SIZE, MADV_HUGEPAGE)) + err(2, "MADV_HUGEPAGE"); + + /* allocate transparent huge page */ + *(volatile void **)ptr = ptr; + + if (pread(pagemap_fd, ent, sizeof(ent), + (uintptr_t)ptr >> (PAGE_SHIFT - 3)) != sizeof(ent)) + err(2, "read pagemap"); + + if (PAGEMAP_PRESENT(ent[0]) && PAGEMAP_PRESENT(ent[1]) && + PAGEMAP_PFN(ent[0]) + 1 == PAGEMAP_PFN(ent[1]) && + !(PAGEMAP_PFN(ent[0]) & ((1 << (HPAGE_SHIFT - PAGE_SHIFT)) - 1))) + return PAGEMAP_PFN(ent[0]); + + return -1; +} + +#endif _