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Three unrelated changes to vm_proc_new(): (1) add vm object locking on the
U pages object; (2) reorganize such that the U pages object is created and filled in one block; and (3) remove an unnecessary clearing of PG_ZERO.
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parent
a37fe9e7cd
commit
ef13663bb6
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=119059
@ -221,12 +221,6 @@ vm_proc_new(struct proc *p)
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vm_page_t m;
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u_int i;
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/*
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* Allocate object for the upage.
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*/
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upobj = vm_object_allocate(OBJT_DEFAULT, UAREA_PAGES);
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p->p_upages_obj = upobj;
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/*
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* Get a kernel virtual address for the U area for this process.
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*/
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@ -235,20 +229,23 @@ vm_proc_new(struct proc *p)
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panic("vm_proc_new: upage allocation failed");
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p->p_uarea = (struct user *)up;
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/*
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* Allocate object and page(s) for the U area.
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*/
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upobj = vm_object_allocate(OBJT_DEFAULT, UAREA_PAGES);
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p->p_upages_obj = upobj;
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VM_OBJECT_LOCK(upobj);
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for (i = 0; i < UAREA_PAGES; i++) {
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/*
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* Get a uarea page.
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*/
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m = vm_page_grab(upobj, i,
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VM_ALLOC_NORMAL | VM_ALLOC_RETRY | VM_ALLOC_WIRED);
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ma[i] = m;
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vm_page_lock_queues();
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vm_page_wakeup(m);
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vm_page_flag_clear(m, PG_ZERO);
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m->valid = VM_PAGE_BITS_ALL;
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vm_page_unlock_queues();
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}
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VM_OBJECT_UNLOCK(upobj);
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/*
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* Enter the pages into the kernel address space.
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