diff options
Diffstat (limited to 'sys/vm/vm_glue.c')
-rw-r--r-- | sys/vm/vm_glue.c | 52 |
1 files changed, 35 insertions, 17 deletions
diff --git a/sys/vm/vm_glue.c b/sys/vm/vm_glue.c index dbd5065d8..f86212f 100644 --- a/sys/vm/vm_glue.c +++ b/sys/vm/vm_glue.c @@ -257,16 +257,18 @@ vm_imgact_hold_page(vm_object_t object, vm_ooffset_t offset) if (m == NULL) goto out; if (rv != VM_PAGER_OK) { + vm_page_lock(m); vm_page_lock_queues(); vm_page_free(m); vm_page_unlock_queues(); + vm_page_unlock(m); m = NULL; goto out; } } - vm_page_lock_queues(); + vm_page_lock(m); vm_page_hold(m); - vm_page_unlock_queues(); + vm_page_unlock(m); vm_page_wakeup(m); out: VM_OBJECT_UNLOCK(object); @@ -300,9 +302,9 @@ vm_imgact_unmap_page(struct sf_buf *sf) m = sf_buf_page(sf); sf_buf_free(sf); sched_unpin(); - vm_page_lock_queues(); + vm_page_lock(m); vm_page_unhold(m); - vm_page_unlock_queues(); + vm_page_unlock(m); } void @@ -434,10 +436,12 @@ vm_thread_stack_dispose(vm_object_t ksobj, vm_offset_t ks, int pages) m = vm_page_lookup(ksobj, i); if (m == NULL) panic("vm_thread_dispose: kstack already missing?"); + vm_page_lock(m); vm_page_lock_queues(); vm_page_unwire(m, 0); vm_page_free(m); vm_page_unlock_queues(); + vm_page_unlock(m); } VM_OBJECT_UNLOCK(ksobj); vm_object_deallocate(ksobj); @@ -524,9 +528,9 @@ vm_thread_swapout(struct thread *td) if (m == NULL) panic("vm_thread_swapout: kstack already missing?"); vm_page_dirty(m); - vm_page_lock_queues(); + vm_page_lock(m); vm_page_unwire(m, 0); - vm_page_unlock_queues(); + vm_page_unlock(m); } VM_OBJECT_UNLOCK(ksobj); } @@ -538,23 +542,37 @@ static void vm_thread_swapin(struct thread *td) { vm_object_t ksobj; - vm_page_t m, ma[KSTACK_MAX_PAGES]; - int i, pages, rv; + vm_page_t ma[KSTACK_MAX_PAGES]; + int i, j, k, pages, rv; pages = td->td_kstack_pages; ksobj = td->td_kstack_obj; VM_OBJECT_LOCK(ksobj); - for (i = 0; i < pages; i++) { - m = vm_page_grab(ksobj, i, VM_ALLOC_NORMAL | VM_ALLOC_RETRY | + for (i = 0; i < pages; i++) + ma[i] = vm_page_grab(ksobj, i, VM_ALLOC_NORMAL | VM_ALLOC_RETRY | VM_ALLOC_WIRED); - if (m->valid != VM_PAGE_BITS_ALL) { - rv = vm_pager_get_pages(ksobj, &m, 1, 0); + for (i = 0; i < pages; i++) { + if (ma[i]->valid != VM_PAGE_BITS_ALL) { + KASSERT(ma[i]->oflags & VPO_BUSY, + ("lost busy 1")); + vm_object_pip_add(ksobj, 1); + for (j = i + 1; j < pages; j++) { + KASSERT(ma[j]->valid == VM_PAGE_BITS_ALL || + (ma[j]->oflags & VPO_BUSY), + ("lost busy 2")); + if (ma[j]->valid == VM_PAGE_BITS_ALL) + break; + } + rv = vm_pager_get_pages(ksobj, ma + i, j - i, 0); if (rv != VM_PAGER_OK) - panic("vm_thread_swapin: cannot get kstack for proc: %d", td->td_proc->p_pid); - m = vm_page_lookup(ksobj, i); - } - ma[i] = m; - vm_page_wakeup(m); + panic("vm_thread_swapin: cannot get kstack for proc: %d", + td->td_proc->p_pid); + vm_object_pip_wakeup(ksobj); + for (k = i; k < j; k++) + ma[k] = vm_page_lookup(ksobj, k); + vm_page_wakeup(ma[i]); + } else if (ma[i]->oflags & VPO_BUSY) + vm_page_wakeup(ma[i]); } VM_OBJECT_UNLOCK(ksobj); pmap_qenter(td->td_kstack, ma, pages); |