[Qemu-devel] [PATCH 01/32] use anonymous memory for kqemu.

[Glauber Costa <glommer@redhat.com>]

Signed-off-by: Glauber Costa <glommer@redhat.com>
---
 osdep.c |  111 ---------------------------------------------------------------
 1 files changed, 0 insertions(+), 111 deletions(-)

diff --git a/osdep.c b/osdep.c
index 683aad0..31c96e6 100644
--- a/osdep.c
+++ b/osdep.c
@@ -68,112 +68,9 @@ void qemu_vfree(void *ptr)
 
 #else
 
-#if defined(USE_KQEMU)
-
-#ifdef __OpenBSD__
-#include <sys/param.h>
-#include <sys/types.h>
-#include <sys/mount.h>
-#else
-#include <sys/vfs.h>
-#endif
-
 #include <sys/mman.h>
 #include <fcntl.h>
 
-static void *kqemu_vmalloc(size_t size)
-{
-    static int phys_ram_fd = -1;
-    static int phys_ram_size = 0;
-    void *ptr;
-
-#ifdef __OpenBSD__ /* no need (?) for a dummy file on OpenBSD */
-    int map_anon = MAP_ANON;
-#else
-    int map_anon = 0;
-    const char *tmpdir;
-    char phys_ram_file[1024];
-#ifdef HOST_SOLARIS
-    struct statvfs stfs;
-#else
-    struct statfs stfs;
-#endif
-
-    if (phys_ram_fd < 0) {
-        tmpdir = getenv("QEMU_TMPDIR");
-        if (!tmpdir)
-#ifdef HOST_SOLARIS
-            tmpdir = "/tmp";
-        if (statvfs(tmpdir, &stfs) == 0) {
-#else
-            tmpdir = "/dev/shm";
-        if (statfs(tmpdir, &stfs) == 0) {
-#endif
-            int64_t free_space;
-            int ram_mb;
-
-            free_space = (int64_t)stfs.f_bavail * stfs.f_bsize;
-            if ((ram_size + 8192 * 1024) >= free_space) {
-                ram_mb = (ram_size / (1024 * 1024));
-                fprintf(stderr,
-                        "You do not have enough space in '%s' for the %d MB of QEMU virtual RAM.\n",
-                        tmpdir, ram_mb);
-                if (strcmp(tmpdir, "/dev/shm") == 0) {
-                    fprintf(stderr, "To have more space available provided you have enough RAM and swap, do as root:\n"
-                            "mount -o remount,size=%dm /dev/shm\n",
-                            ram_mb + 16);
-                } else {
-                    fprintf(stderr,
-                            "Use the '-m' option of QEMU to diminish the amount of virtual RAM or use the\n"
-                            "QEMU_TMPDIR environment variable to set another directory where the QEMU\n"
-                            "temporary RAM file will be opened.\n");
-                }
-                fprintf(stderr, "Or disable the accelerator module with -no-kqemu\n");
-                exit(1);
-            }
-        }
-        snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX",
-                 tmpdir);
-        phys_ram_fd = mkstemp(phys_ram_file);
-        if (phys_ram_fd < 0) {
-            fprintf(stderr,
-                    "warning: could not create temporary file in '%s'.\n"
-                    "Use QEMU_TMPDIR to select a directory in a tmpfs filesystem.\n"
-                    "Using '/tmp' as fallback.\n",
-                    tmpdir);
-            snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX",
-                     "/tmp");
-            phys_ram_fd = mkstemp(phys_ram_file);
-            if (phys_ram_fd < 0) {
-                fprintf(stderr, "Could not create temporary memory file '%s'\n",
-                        phys_ram_file);
-                exit(1);
-            }
-        }
-        unlink(phys_ram_file);
-    }
-    size = (size + 4095) & ~4095;
-    ftruncate(phys_ram_fd, phys_ram_size + size);
-#endif /* !__OpenBSD__ */
-    ptr = mmap(NULL,
-               size,
-               PROT_WRITE | PROT_READ, map_anon | MAP_SHARED,
-               phys_ram_fd, phys_ram_size);
-    if (ptr == MAP_FAILED) {
-        fprintf(stderr, "Could not map physical memory\n");
-        exit(1);
-    }
-    phys_ram_size += size;
-    return ptr;
-}
-
-static void kqemu_vfree(void *ptr)
-{
-    /* may be useful some day, but currently we do not need to free */
-}
-
-#endif
-
 void *qemu_memalign(size_t alignment, size_t size)
 {
 #if defined(_POSIX_C_SOURCE)
@@ -193,10 +90,6 @@ void *qemu_memalign(size_t alignment, size_t size)
 /* alloc shared memory pages */
 void *qemu_vmalloc(size_t size)
 {
-#if defined(USE_KQEMU)
-    if (kqemu_allowed)
-        return kqemu_vmalloc(size);
-#endif
 #ifdef _BSD
     return valloc(size);
 #else
@@ -206,10 +99,6 @@ void *qemu_vmalloc(size_t size)
 
 void qemu_vfree(void *ptr)
 {
-#if defined(USE_KQEMU)
-    if (kqemu_allowed)
-        kqemu_vfree(ptr);
-#endif
     free(ptr);
 }
 
-- 
1.5.5.1