d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Acquire Giant around vm_map_remove() inside of the obreak() syscall for

Browse Source 
vm_object_terminate().
This commit is contained in:
jhb 2001-05-23 22:13:10 +00:00
parent aae0e8da5f
commit 04aacfa658
1 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
sys/vm/vm_unix.c
View File

@ -95,11 +95,11 @@ obreak(p, uap)
return EINVAL;
}
mtx_lock(&vm_mtx);
if (new > old) {
vm_size_t diff;
diff = new - old;
mtx_lock(&vm_mtx);
rv = vm_map_find(&vm->vm_map, NULL, 0, &old, diff, FALSE,
VM_PROT_ALL, VM_PROT_ALL, 0);
if (rv != KERN_SUCCESS) {
@ -107,15 +107,20 @@ obreak(p, uap)
return (ENOMEM);
}
vm->vm_dsize += btoc(diff);
mtx_unlock(&vm_mtx);
} else if (new < old) {
mtx_lock(&Giant);
mtx_lock(&vm_mtx);
rv = vm_map_remove(&vm->vm_map, new, old);
if (rv != KERN_SUCCESS) {
mtx_unlock(&vm_mtx);
mtx_unlock(&Giant);
return (ENOMEM);
}
vm->vm_dsize -= btoc(old - new);
mtx_unlock(&vm_mtx);
mtx_unlock(&Giant);
}
mtx_unlock(&vm_mtx);
return (0);
}