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- Lock the vm_object when iterating over its list of resident pages.

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This commit is contained in:
Alan Cox 2003-04-25 16:30:02 +00:00
parent 33cfde03bc
commit 6a07e90d63
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=114019
1 changed files with 8 additions and 0 deletions
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8
sys/vm/vm_glue.c
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@ -265,6 +265,7 @@ vm_proc_dispose(struct proc *p)
vm_page_t m;
upobj = p->p_upages_obj;
VM_OBJECT_LOCK(upobj);
if (upobj->resident_page_count != UAREA_PAGES)
panic("vm_proc_dispose: incorrect number of pages in upobj");
vm_page_lock_queues();
@ -274,6 +275,7 @@ vm_proc_dispose(struct proc *p)
vm_page_free(m);
}
vm_page_unlock_queues();
VM_OBJECT_UNLOCK(upobj);
up = (vm_offset_t)p->p_uarea;
pmap_qremove(up, UAREA_PAGES);
kmem_free(kernel_map, up, UAREA_PAGES * PAGE_SIZE);
@ -292,6 +294,7 @@ vm_proc_swapout(struct proc *p)
vm_page_t m;
upobj = p->p_upages_obj;
VM_OBJECT_LOCK(upobj);
if (upobj->resident_page_count != UAREA_PAGES)
panic("vm_proc_dispose: incorrect number of pages in upobj");
vm_page_lock_queues();
@ -300,6 +303,7 @@ vm_proc_swapout(struct proc *p)
vm_page_unwire(m, 0);
}
vm_page_unlock_queues();
VM_OBJECT_UNLOCK(upobj);
up = (vm_offset_t)p->p_uarea;
pmap_qremove(up, UAREA_PAGES);
}
@ -327,6 +331,7 @@ vm_proc_swapin(struct proc *p)
}
ma[i] = m;
}
VM_OBJECT_LOCK(upobj);
if (upobj->resident_page_count != UAREA_PAGES)
panic("vm_proc_swapin: lost pages from upobj");
vm_page_lock_queues();
@ -336,6 +341,7 @@ vm_proc_swapin(struct proc *p)
vm_page_wakeup(m);
}
vm_page_unlock_queues();
VM_OBJECT_UNLOCK(upobj);
up = (vm_offset_t)p->p_uarea;
pmap_qenter(up, ma, UAREA_PAGES);
}
@ -362,12 +368,14 @@ vm_proc_swapin_all(int devidx)
sx_sunlock(&allproc_lock);
faultin(p);
PROC_UNLOCK(p);
VM_OBJECT_LOCK(object);
vm_page_lock_queues();
TAILQ_FOREACH(m, &object->memq, listq)
vm_page_dirty(m);
vm_page_unlock_queues();
swap_pager_freespace(object, 0,
object->un_pager.swp.swp_bcount);
VM_OBJECT_UNLOCK(object);
goto retry;
}