diff options
Diffstat (limited to 'sys/kern/sys_process.c')
| -rw-r--r-- | sys/kern/sys_process.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/sys/kern/sys_process.c b/sys/kern/sys_process.c index 1aa6995..dfc36ba 100644 --- a/sys/kern/sys_process.c +++ b/sys/kern/sys_process.c @@ -59,6 +59,7 @@ __FBSDID("$FreeBSD$"); #include <vm/vm_kern.h> #include <vm/vm_object.h> #include <vm/vm_page.h> +#include <vm/vm_pager.h> #include <vm/vm_param.h> #ifdef COMPAT_IA32 @@ -213,10 +214,10 @@ int proc_rwmem(struct proc *p, struct uio *uio) { vm_map_t map; - vm_object_t backing_object, object = NULL; - vm_offset_t pageno = 0; /* page number */ + vm_object_t backing_object, object; + vm_offset_t pageno; /* page number */ vm_prot_t reqprot; - int error, fault_flags, writing; + int error, writing; /* * Assert that someone has locked this vmspace. (Should be @@ -232,9 +233,7 @@ proc_rwmem(struct proc *p, struct uio *uio) map = &p->p_vmspace->vm_map; writing = uio->uio_rw == UIO_WRITE; - reqprot = writing ? (VM_PROT_WRITE | VM_PROT_OVERRIDE_WRITE) : - VM_PROT_READ; - fault_flags = writing ? VM_FAULT_DIRTY : VM_FAULT_NORMAL; + reqprot = writing ? VM_PROT_COPY | VM_PROT_READ : VM_PROT_READ; /* * Only map in one page at a time. We don't have to, but it @@ -269,7 +268,7 @@ proc_rwmem(struct proc *p, struct uio *uio) /* * Fault the page on behalf of the process */ - error = vm_fault(map, pageno, reqprot, fault_flags); + error = vm_fault(map, pageno, reqprot, VM_FAULT_NORMAL); if (error) { if (error == KERN_RESOURCE_SHORTAGE) error = ENOMEM; @@ -279,8 +278,8 @@ proc_rwmem(struct proc *p, struct uio *uio) } /* - * Now we need to get the page. out_entry, wired, - * and single_use aren't used. One would think the vm code + * Now we need to get the page. out_entry and wired + * aren't used. One would think the vm code * would be a *bit* nicer... We use tmap because * vm_map_lookup() can change the map argument. */ @@ -303,6 +302,10 @@ proc_rwmem(struct proc *p, struct uio *uio) VM_OBJECT_UNLOCK(object); object = backing_object; } + if (writing && m != NULL) { + vm_page_dirty(m); + vm_pager_page_unswapped(m); + } VM_OBJECT_UNLOCK(object); if (m == NULL) { vm_map_lookup_done(tmap, out_entry); |
