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Date: Fri, 7 Apr 2023 12:24:37 +0300
From: Mike Rapoport <rppt@...ux.ibm.com>
To: Peter Xu <peterx@...hat.com>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org,
David Hildenbrand <david@...hat.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Andrea Arcangeli <aarcange@...hat.com>,
Axel Rasmussen <axelrasmussen@...gle.com>,
Mike Kravetz <mike.kravetz@...cle.com>,
Leonardo Bras Soares Passos <lsoaresp@...hat.com>,
Mike Rapoport <rppt@...ux.vnet.ibm.com>,
Nadav Amit <nadav.amit@...il.com>
Subject: Re: [PATCH 07/29] selftests/mm: Merge default_huge_page_size() into
one
On Thu, Mar 30, 2023 at 12:07:05PM -0400, Peter Xu wrote:
> There're already 3 same definitions of the three functions. Move it into
> vm_util.[ch].
>
> Signed-off-by: Peter Xu <peterx@...hat.com>
Reviewed-by: Mike Rapoport (IBM) <rppt@...nel.org>
> ---
> tools/testing/selftests/mm/hugetlb-madvise.c | 25 +-------------------
> tools/testing/selftests/mm/thuge-gen.c | 19 +--------------
> tools/testing/selftests/mm/userfaultfd.c | 24 -------------------
> tools/testing/selftests/mm/vm_util.c | 21 ++++++++++++++++
> tools/testing/selftests/mm/vm_util.h | 1 +
> 5 files changed, 24 insertions(+), 66 deletions(-)
>
> diff --git a/tools/testing/selftests/mm/hugetlb-madvise.c b/tools/testing/selftests/mm/hugetlb-madvise.c
> index 9a127a8fe176..28426e30d9bc 100644
> --- a/tools/testing/selftests/mm/hugetlb-madvise.c
> +++ b/tools/testing/selftests/mm/hugetlb-madvise.c
> @@ -18,6 +18,7 @@
> #include <unistd.h>
> #include <sys/mman.h>
> #include <fcntl.h>
> +#include "vm_util.h"
>
> #define MIN_FREE_PAGES 20
> #define NR_HUGE_PAGES 10 /* common number of pages to map/allocate */
> @@ -35,30 +36,6 @@
> unsigned long huge_page_size;
> unsigned long base_page_size;
>
> -/*
> - * default_huge_page_size copied from mlock2-tests.c
> - */
> -unsigned long default_huge_page_size(void)
> -{
> - unsigned long hps = 0;
> - char *line = NULL;
> - size_t linelen = 0;
> - FILE *f = fopen("/proc/meminfo", "r");
> -
> - if (!f)
> - return 0;
> - while (getline(&line, &linelen, f) > 0) {
> - if (sscanf(line, "Hugepagesize: %lu kB", &hps) == 1) {
> - hps <<= 10;
> - break;
> - }
> - }
> -
> - free(line);
> - fclose(f);
> - return hps;
> -}
> -
> unsigned long get_free_hugepages(void)
> {
> unsigned long fhp = 0;
> diff --git a/tools/testing/selftests/mm/thuge-gen.c b/tools/testing/selftests/mm/thuge-gen.c
> index 361ef7192cc6..380ab5f0a534 100644
> --- a/tools/testing/selftests/mm/thuge-gen.c
> +++ b/tools/testing/selftests/mm/thuge-gen.c
> @@ -24,6 +24,7 @@
> #include <unistd.h>
> #include <stdarg.h>
> #include <string.h>
> +#include "vm_util.h"
>
> #define err(x) perror(x), exit(1)
>
> @@ -74,24 +75,6 @@ void find_pagesizes(void)
> globfree(&g);
> }
>
> -unsigned long default_huge_page_size(void)
> -{
> - unsigned long hps = 0;
> - char *line = NULL;
> - size_t linelen = 0;
> - FILE *f = fopen("/proc/meminfo", "r");
> - if (!f)
> - return 0;
> - while (getline(&line, &linelen, f) > 0) {
> - if (sscanf(line, "Hugepagesize: %lu kB", &hps) == 1) {
> - hps <<= 10;
> - break;
> - }
> - }
> - free(line);
> - return hps;
> -}
> -
> void show(unsigned long ps)
> {
> char buf[100];
> diff --git a/tools/testing/selftests/mm/userfaultfd.c b/tools/testing/selftests/mm/userfaultfd.c
> index a96d126cb40e..4cc80a0e8955 100644
> --- a/tools/testing/selftests/mm/userfaultfd.c
> +++ b/tools/testing/selftests/mm/userfaultfd.c
> @@ -1703,30 +1703,6 @@ static int userfaultfd_stress(void)
> || userfaultfd_events_test() || userfaultfd_minor_test();
> }
>
> -/*
> - * Copied from mlock2-tests.c
> - */
> -unsigned long default_huge_page_size(void)
> -{
> - unsigned long hps = 0;
> - char *line = NULL;
> - size_t linelen = 0;
> - FILE *f = fopen("/proc/meminfo", "r");
> -
> - if (!f)
> - return 0;
> - while (getline(&line, &linelen, f) > 0) {
> - if (sscanf(line, "Hugepagesize: %lu kB", &hps) == 1) {
> - hps <<= 10;
> - break;
> - }
> - }
> -
> - free(line);
> - fclose(f);
> - return hps;
> -}
> -
> static void set_test_type(const char *type)
> {
> if (!strcmp(type, "anon")) {
> diff --git a/tools/testing/selftests/mm/vm_util.c b/tools/testing/selftests/mm/vm_util.c
> index 0204c469be43..12dc654b5be3 100644
> --- a/tools/testing/selftests/mm/vm_util.c
> +++ b/tools/testing/selftests/mm/vm_util.c
> @@ -180,3 +180,24 @@ int64_t allocate_transhuge(void *ptr, int pagemap_fd)
>
> return -1;
> }
> +
> +unsigned long default_huge_page_size(void)
> +{
> + unsigned long hps = 0;
> + char *line = NULL;
> + size_t linelen = 0;
> + FILE *f = fopen("/proc/meminfo", "r");
> +
> + if (!f)
> + return 0;
> + while (getline(&line, &linelen, f) > 0) {
> + if (sscanf(line, "Hugepagesize: %lu kB", &hps) == 1) {
> + hps <<= 10;
> + break;
> + }
> + }
> +
> + free(line);
> + fclose(f);
> + return hps;
> +}
> diff --git a/tools/testing/selftests/mm/vm_util.h b/tools/testing/selftests/mm/vm_util.h
> index 6edeb531afc6..d7163fff8fb7 100644
> --- a/tools/testing/selftests/mm/vm_util.h
> +++ b/tools/testing/selftests/mm/vm_util.h
> @@ -35,6 +35,7 @@ bool check_huge_anon(void *addr, int nr_hpages, uint64_t hpage_size);
> bool check_huge_file(void *addr, int nr_hpages, uint64_t hpage_size);
> bool check_huge_shmem(void *addr, int nr_hpages, uint64_t hpage_size);
> int64_t allocate_transhuge(void *ptr, int pagemap_fd);
> +unsigned long default_huge_page_size(void);
>
> /*
> * On ppc64 this will only work with radix 2M hugepage size
> --
> 2.39.1
>
--
Sincerely yours,
Mike.
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