diff options
Diffstat (limited to 'util/mmap-alloc.c')
| -rw-r--r-- | util/mmap-alloc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/util/mmap-alloc.c b/util/mmap-alloc.c index 1ddc0e2a1e..d0cf4aaee5 100644 --- a/util/mmap-alloc.c +++ b/util/mmap-alloc.c @@ -20,6 +20,7 @@ #include "qemu/osdep.h" #include "qemu/mmap-alloc.h" #include "qemu/host-utils.h" +#include "qemu/error-report.h" #define HUGETLBFS_MAGIC 0x958458f6 @@ -121,6 +122,7 @@ static void *mmap_reserve(size_t size, int fd) static void *mmap_activate(void *ptr, size_t size, int fd, uint32_t qemu_map_flags, off_t map_offset) { + const bool noreserve = qemu_map_flags & QEMU_MAP_NORESERVE; const bool readonly = qemu_map_flags & QEMU_MAP_READONLY; const bool shared = qemu_map_flags & QEMU_MAP_SHARED; const bool sync = qemu_map_flags & QEMU_MAP_SYNC; @@ -129,6 +131,11 @@ static void *mmap_activate(void *ptr, size_t size, int fd, int flags = MAP_FIXED; void *activated_ptr; + if (noreserve) { + error_report("Skipping reservation of swap space is not supported"); + return MAP_FAILED; + } + flags |= fd == -1 ? MAP_ANONYMOUS : 0; flags |= shared ? MAP_SHARED : MAP_PRIVATE; if (shared && sync) { |