diff options
Diffstat (limited to 'sys/vm/vm_mmap.c')
| -rw-r--r-- | sys/vm/vm_mmap.c | 39 |
1 files changed, 0 insertions, 39 deletions
diff --git a/sys/vm/vm_mmap.c b/sys/vm/vm_mmap.c index a73e03a..f2b317e 100644 --- a/sys/vm/vm_mmap.c +++ b/sys/vm/vm_mmap.c @@ -48,7 +48,6 @@ __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/systm.h> -#include <sys/kernel.h> #include <sys/lock.h> #include <sys/mutex.h> #include <sys/sysproto.h> @@ -66,7 +65,6 @@ __FBSDID("$FreeBSD$"); #include <sys/stat.h> #include <sys/sysent.h> #include <sys/vmmeter.h> -#include <sys/sysctl.h> #include <security/mac/mac_framework.h> @@ -80,7 +78,6 @@ __FBSDID("$FreeBSD$"); #include <vm/vm_pageout.h> #include <vm/vm_extern.h> #include <vm/vm_page.h> -#include <vm/vm_kern.h> #ifdef HWPMC_HOOKS #include <sys/pmckern.h> @@ -92,30 +89,6 @@ struct sbrk_args { }; #endif -static int max_proc_mmap; -SYSCTL_INT(_vm, OID_AUTO, max_proc_mmap, CTLFLAG_RW, &max_proc_mmap, 0, - "Maximum number of memory-mapped files per process"); - -/* - * Set the maximum number of vm_map_entry structures per process. Roughly - * speaking vm_map_entry structures are tiny, so allowing them to eat 1/100 - * of our KVM malloc space still results in generous limits. We want a - * default that is good enough to prevent the kernel running out of resources - * if attacked from compromised user account but generous enough such that - * multi-threaded processes are not unduly inconvenienced. - */ -static void vmmapentry_rsrc_init(void *); -SYSINIT(vmmersrc, SI_SUB_KVM_RSRC, SI_ORDER_FIRST, vmmapentry_rsrc_init, - NULL); - -static void -vmmapentry_rsrc_init(dummy) - void *dummy; -{ - max_proc_mmap = vm_kmem_size / sizeof(struct vm_map_entry); - max_proc_mmap /= 100; -} - static int vm_mmap_vnode(struct thread *, vm_size_t, vm_prot_t, vm_prot_t *, int *, struct vnode *, vm_ooffset_t *, vm_object_t *); static int vm_mmap_cdev(struct thread *, vm_size_t, vm_prot_t, vm_prot_t *, @@ -377,18 +350,6 @@ mmap(td, uap) handle_type = OBJT_VNODE; } map: - - /* - * Do not allow more then a certain number of vm_map_entry structures - * per process. Scale with the number of rforks sharing the map - * to make the limit reasonable for threads. - */ - if (max_proc_mmap && - vms->vm_map.nentries >= max_proc_mmap * vms->vm_refcnt) { - error = ENOMEM; - goto done; - } - td->td_fpop = fp; error = vm_mmap(&vms->vm_map, &addr, size, prot, maxprot, flags, handle_type, handle, pos); |
