Allow applications that program to the libhugetlbfs API to specify a page size
when requesting a hugetlbfs fd. If the size is invalid or not configured, an
error will be returned.
Signed-off-by: Adam Litke <[EMAIL PROTECTED]>
---
hugetlbfs.h | 2 ++
hugeutils.c | 35 ++++++++++++++++++++++++++++-------
2 files changed, 30 insertions(+), 7 deletions(-)
diff --git a/hugetlbfs.h b/hugetlbfs.h
index 169e55f..d27ba6f 100644
--- a/hugetlbfs.h
+++ b/hugetlbfs.h
@@ -24,7 +24,9 @@
long gethugepagesize(void);
int hugetlbfs_test_path(const char *mount);
const char *hugetlbfs_find_path(void);
+const char *hugetlbfs_find_path_for_size(long page_size);
int hugetlbfs_unlinked_fd(void);
+int hugetlbfs_unlinked_fd_for_size(long page_size);
/* Diagnoses/debugging only functions */
long __lh_dump_proc_pid_maps(void);
diff --git a/hugeutils.c b/hugeutils.c
index 8a40640..cf8b83f 100644
--- a/hugeutils.c
+++ b/hugeutils.c
@@ -378,23 +378,39 @@ int hugetlbfs_test_path(const char *mount)
return (sb.f_type == HUGETLBFS_MAGIC);
}
-const char *hugetlbfs_find_path(void)
+const char *hugetlbfs_find_path_for_size(long page_size)
{
- char *path = hpage_sizes[hpage_sizes_default_idx].mount;
+ char *path;
+ int idx;
- if (strlen(path))
- return path;
+ if (page_size == 0)
+ idx = hpage_sizes_default_idx;
else
- return NULL;
+ idx = hpage_size_to_index(page_size);
+
+ if (idx >= 0) {
+ path = hpage_sizes[idx].mount;
+ if (strlen(path))
+ return path;
+ }
+ return NULL;
}
-int hugetlbfs_unlinked_fd(void)
+const char *hugetlbfs_find_path(void)
+{
+ return hugetlbfs_find_path_for_size(0);
+}
+
+int hugetlbfs_unlinked_fd_for_size(long page_size)
{
const char *path;
char name[PATH_MAX+1];
int fd;
- path = hugetlbfs_find_path();
+ if (page_size == 0)
+ page_size = hpage_sizes[hpage_sizes_default_idx].pagesize;
+
+ path = hugetlbfs_find_path_for_size(page_size);
if (!path)
return -1;
@@ -416,6 +432,11 @@ int hugetlbfs_unlinked_fd(void)
return fd;
}
+int hugetlbfs_unlinked_fd(void)
+{
+ return hugetlbfs_unlinked_fd_for_size(0);
+}
+
#define IOV_LEN 64
int __lh_hugetlbfs_prefault(int fd, void *addr, size_t length)
{
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