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

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vm_object_terminate().
This commit is contained in:
John Baldwin 2001-05-23 22:13:10 +00:00
parent 95f27dc639
commit bb10bb4978
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=77080
1 changed files with 7 additions and 2 deletions
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9
sys/vm/vm_unix.c
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@ -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);
}