This option allows the user to request that all instances of the target
program should share their read-only segments that are remapped to
huge pages.
Signed-off-by: Eric B Munson <ebmun...@us.ibm.com>
---
hugectl.c | 12 ++++++++++++
1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/hugectl.c b/hugectl.c
index 3497258..1522cba 100644
--- a/hugectl.c
+++ b/hugectl.c
@@ -73,6 +73,8 @@ void print_usage()
OPTION("--dry-run", "describe what would be done without doing it");
OPTION("--library-use-path", "Use the system library path");
+ OPTION("--share-text", "Allow the text segement to be shared if");
+ CONT("it is backed by huge pages.");
OPTION("--library-path <path>", "Select a library prefix");
CONT("(Default: "
#ifdef LIBDIR32
@@ -150,6 +152,7 @@ void verbose_expose(void)
#define LONG_DRY_RUN (LONG_BASE | 'd')
+#define LONG_SHARE (LONG_BASE | 's')
#define LONG_NO_LIBRARY (LONG_BASE | 'L')
#define LONG_LIBRARY (LONG_BASE | 'l')
@@ -320,6 +323,7 @@ int main(int argc, char** argv)
{
int opt_mappings = 0;
int opt_preload = 1;
+ int opt_share = 0;
char *opt_library = NULL;
char opts[] = "+hv";
@@ -333,6 +337,7 @@ int main(int argc, char** argv)
required_argument, NULL, LONG_LIBRARY},
{"library-use-path",
no_argument, NULL, LONG_NO_LIBRARY},
+ {"share-text", no_argument, NULL, LONG_SHARE},
{"disable", optional_argument, NULL, MAP_BASE|MAP_DISABLE},
{"text", optional_argument, NULL, MAP_BASE|MAP_TEXT},
@@ -387,6 +392,10 @@ int main(int argc, char** argv)
opt_library = optarg;
break;
+ case LONG_SHARE:
+ opt_share = 1;
+ break;
+
case -1:
break;
@@ -414,6 +423,9 @@ int main(int argc, char** argv)
if (opt_preload)
ldpreload(opt_mappings);
+ if (opt_share)
+ setup_environment("HUGETLB_SHARE", "1");
+
if (opt_dry_run)
exit(EXIT_SUCCESS);
--
1.6.0.3
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