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Avoid vm_page_lookup() [grabs a spinlock] and just process the upage

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object memq instead.

Suggested by:	alc
This commit is contained in:
Peter Wemm 2002-07-08 01:11:10 +00:00
parent 617dbd3c84
commit f59685a4b7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=99563
1 changed files with 9 additions and 14 deletions
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23
sys/vm/vm_glue.c
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@ -262,21 +262,18 @@ vm_proc_dispose(struct proc *p)
vm_object_t upobj;
vm_offset_t up;
vm_page_t m;
int i;
upobj = p->p_upages_obj;
up = (vm_offset_t)p->p_uarea;
for (i = 0; i < UAREA_PAGES; i++) {
m = vm_page_lookup(upobj, i);
if (m == NULL)
panic("vm_proc_dispose: upage already missing?");
if (upobj->resident_page_count != UAREA_PAGES)
panic("vm_proc_dispose: incorrect number of pages in upobj");
while ((m = TAILQ_FIRST(&upobj->memq)) != NULL) {
vm_page_busy(m);
vm_page_unwire(m, 0);
vm_page_free(m);
}
up = (vm_offset_t)p->p_uarea;
pmap_qremove(up, UAREA_PAGES);
kmem_free(kernel_map, up, UAREA_PAGES * PAGE_SIZE);
p->p_upages_obj = NULL;
vm_object_deallocate(upobj);
}
@ -290,17 +287,15 @@ vm_proc_swapout(struct proc *p)
vm_object_t upobj;
vm_offset_t up;
vm_page_t m;
int i;
upobj = p->p_upages_obj;
up = (vm_offset_t)p->p_uarea;
for (i = 0; i < UAREA_PAGES; i++) {
m = vm_page_lookup(upobj, i);
if (m == NULL)
panic("vm_proc_swapout: upage already missing?");
if (upobj->resident_page_count != UAREA_PAGES)
panic("vm_proc_dispose: incorrect number of pages in upobj");
TAILQ_FOREACH(m, &upobj->memq, listq) {
vm_page_dirty(m);
vm_page_unwire(m, 0);
}
up = (vm_offset_t)p->p_uarea;
pmap_qremove(up, UAREA_PAGES);
}
@ -318,7 +313,6 @@ vm_proc_swapin(struct proc *p)
int i;
upobj = p->p_upages_obj;
up = (vm_offset_t)p->p_uarea;
for (i = 0; i < UAREA_PAGES; i++) {
m = vm_page_grab(upobj, i, VM_ALLOC_NORMAL | VM_ALLOC_RETRY);
if (m->valid != VM_PAGE_BITS_ALL) {
@ -333,6 +327,7 @@ vm_proc_swapin(struct proc *p)
vm_page_wakeup(m);
vm_page_flag_set(m, PG_MAPPED | PG_WRITEABLE);
}
up = (vm_offset_t)p->p_uarea;
pmap_qenter(up, ma, UAREA_PAGES);
}
#endif