Add a new utility to list page sizes supported on the system.
Signed-off-by: Andy Whitcroft <[EMAIL PROTECTED]>
Acked-by: Mel Gorman <[EMAIL PROTECTED]>
---
Makefile | 8 +++-
pagesize.c | 143 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 150 insertions(+), 1 deletions(-)
create mode 100644 pagesize.c
diff --git a/Makefile b/Makefile
index 72d2ab2..e09bc0b 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ EXEDIR = /bin
LIBOBJS = hugeutils.o version.o init.o morecore.o debug.o alloc.o shm.o
kernel-features.o
INSTALL_OBJ_LIBS = libhugetlbfs.so libhugetlbfs.a
BIN_OBJ_DIR=obj
-INSTALL_BIN = hugectl hugeedit hugeadm
+INSTALL_BIN = hugectl hugeedit hugeadm pagesize
INSTALL_HEADERS = hugetlbfs.h
INSTALL_MAN3 = get_huge_pages.3
INSTALL_MAN7 = libhugetlbfs.7
@@ -268,6 +268,12 @@ $(BIN_OBJ_DIR)/hugeadm: $(foreach
file,$(HUGEADM_OBJ),$(BIN_OBJ_DIR)/$(file))
mkdir -p $(BIN_OBJ_DIR)
$(CC) $(CPPFLAGS) $(CFLAGS) $(LIBPATHS) -o $@ $^
+PAGESIZE_OBJ=pagesize.o hugeutils.o debug.o
+$(BIN_OBJ_DIR)/pagesize: $(foreach file,$(PAGESIZE_OBJ),$(BIN_OBJ_DIR)/$(file))
+ @$(VECHO) LDHOST $@
+ mkdir -p $(BIN_OBJ_DIR)
+ $(CC) $(CPPFLAGS) $(CFLAGS) $(LIBPATHS) -o $@ $^
+
clean:
@$(VECHO) CLEAN
rm -f *~ *.o *.so *.a *.d *.i core a.out $(VERSION)
diff --git a/pagesize.c b/pagesize.c
new file mode 100644
index 0000000..2b12f89
--- /dev/null
+++ b/pagesize.c
@@ -0,0 +1,143 @@
+/***************************************************************************
+ * User front end for using huge pages Copyright (C) 2008, IBM *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the Lesser GNU General Public License as *
+ * published by the Free Software Foundation; either version 2.1 of the *
+ * License, or at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU Lesser General Public License for more details. *
+ * *
+ * You should have received a copy of the Lesser GNU General Public *
+ * License along with this program; if not, write to the *
+ * Free Software Foundation, Inc., *
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
+ ***************************************************************************/
+
+/*
+ * hugectl is inspired by numactl as a single front end to a large number of
+ * options for controlling a very specific environment. Eventually it will
+ * have support for controlling the all of the environment variables for
+ * libhugetlbfs, but options will only be added after they have been in the
+ * library for some time and are throughly tested and stable.
+ *
+ * This program should be treated as an ABI for using libhugetlbfs.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <limits.h>
+
+#define _GNU_SOURCE /* for getopt_long */
+#include <unistd.h>
+#include <getopt.h>
+
+#define REPORT_UTIL "pagesize"
+#include "libhugetlbfs_internal.h"
+#include "hugetlbfs.h"
+
+extern int errno;
+extern int optind;
+extern char *optarg;
+
+#define OPTION(opts, text) fprintf(stderr, " %-25s %s\n", opts, text)
+#define CONT(text) fprintf(stderr, " %-25s %s\n", "", text)
+
+void print_usage()
+{
+ fprintf(stderr, "hugectl [options] target\n");
+ fprintf(stderr, "options:\n");
+
+ OPTION("--help, -h", "Prints this message");
+
+ OPTION("--all, -a", "show all supported page sizes");
+ OPTION("--huge-only, -H", "show only huge page sizes");
+}
+
+static int cmpsizes(const void *p1, const void *p2)
+{
+ return *((long *)p1) > *((long *)p2);
+}
+
+#define MAX_PAGESIZES 32
+
+int main(int argc, char** argv)
+{
+ int opt_all = 0;
+ int opt_huge = 0;
+
+ char opts[] = "+haH";
+ int ret = 0, index = 0;
+ struct option long_opts[] = {
+ {"all", no_argument, NULL, 'a'},
+ {"huge-only", no_argument, NULL, 'H'},
+
+ {0},
+ };
+
+ long pagesizes[MAX_PAGESIZES];
+ int i;
+
+ __lh_hugetlbfs_setup_debug();
+
+ while (ret != -1) {
+ ret = getopt_long(argc, argv, opts, long_opts, &index);
+ switch (ret) {
+ case '?':
+ print_usage();
+ exit(EXIT_FAILURE);
+
+ case 'h':
+ print_usage();
+ exit(EXIT_SUCCESS);
+
+ case 'a':
+ opt_all = 1;
+ DEBUG("selecting all page sizes\n");
+ break;
+
+ case 'H':
+ opt_huge = 1;
+ opt_all = 1;
+ DEBUG("selecting only huge page sizes\n");
+ break;
+
+ case -1:
+ break;
+
+ default:
+ WARNING("unparsed option %08x\n", ret);
+ ret = -1;
+ break;
+ }
+ }
+ index = optind;
+ if ((argc - index) != 0) {
+ print_usage();
+ exit(EXIT_FAILURE);
+ }
+
+ if (!opt_all) {
+ pagesizes[0] = sysconf(_SC_PAGESIZE);
+ ret = 1;
+ } else if (opt_huge)
+ ret = gethugepagesizes(pagesizes, MAX_PAGESIZES);
+ else
+ ret = getpagesizes(pagesizes, MAX_PAGESIZES);
+ if (ret < 0) {
+ ERROR("failed to get list of supported page sizes\n");
+ exit(EXIT_FAILURE);
+ }
+
+ qsort(pagesizes, ret, sizeof(long), cmpsizes);
+ for (i = 0; i < ret; i++) {
+ printf("%ld\n", pagesizes[i]);
+ }
+
+ exit(EXIT_SUCCESS);
+}
--
1.6.0.1.451.gc8d31
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