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authorbellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>2005-04-23 20:44:25 +0000
committerbellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>2005-04-23 20:44:25 +0000
commit6bae7ed8b900bc0f1fb1df0f70ceed5e8cca0ca1 (patch)
tree0456bc201af6253733741f5426a7c98f2cd4284d /osdep.c
parentFix dumping of arm registers (Paul Brook) (diff)
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informative message about low memory on /dev/shm
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1388 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'osdep.c')
-rw-r--r--osdep.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/osdep.c b/osdep.c
index eef1ecbec..f2a69d9a7 100644
--- a/osdep.c
+++ b/osdep.c
@@ -323,6 +323,7 @@ void qemu_vfree(void *ptr)
#elif defined(USE_KQEMU)
+#include <sys/vfs.h>
#include <sys/mman.h>
#include <fcntl.h>
@@ -333,11 +334,37 @@ void *qemu_vmalloc(size_t size)
const char *tmpdir;
char phys_ram_file[1024];
void *ptr;
+ struct statfs stfs;
if (phys_ram_fd < 0) {
tmpdir = getenv("QEMU_TMPDIR");
if (!tmpdir)
tmpdir = "/dev/shm";
+ if (statfs(tmpdir, &stfs) == 0) {
+ int64_t free_space;
+ int ram_mb;
+
+ extern int ram_size;
+ 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"
+ "umount /dev/shm\n"
+ "mount -t tmpfs -o size=%dm none /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");
+ }
+ exit(1);
+ }
+ }
snprintf(phys_ram_file, sizeof(phys_ram_file), "%s/qemuXXXXXX",
tmpdir);
if (mkstemp(phys_ram_file) < 0) {