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Remove pmap.pm_pvlist and make the functions that use it no-ops. These are

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all optimizations for architectures which have large sparse page tables,
and/or can't put the pv linkage inside of the page table entries.
This commit is contained in:
Jake Burkholder 2002-05-29 05:24:16 +00:00
parent 60c6f9b332
commit b08270ba0f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=97444
3 changed files with 3 additions and 53 deletions
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1
sys/sparc64/include/pmap.h
View file

@ -66,7 +66,6 @@ struct md_page {
};
struct pmap {
TAILQ_HEAD(,pv_entry) pm_pvlist;
struct tte *pm_tsb;
vm_object_t pm_tsb_obj;
u_int pm_active;

40
sys/sparc64/sparc64/pmap.c
View file

@ -396,7 +396,6 @@ pmap_bootstrap(vm_offset_t ekva)
for (i = 0; i < MAXCPU; i++)
pm->pm_context[i] = TLB_CTX_KERNEL;
pm->pm_active = ~0;
TAILQ_INIT(&pm->pm_pvlist);
/* XXX flush all non-locked tlb entries */
}
@ -1100,7 +1099,6 @@ pmap_pinit0(pmap_t pm)
pm->pm_active = 0;
pm->pm_tsb = NULL;
pm->pm_tsb_obj = NULL;
TAILQ_INIT(&pm->pm_pvlist);
bzero(&pm->pm_stats, sizeof(pm->pm_stats));
}
@ -1148,7 +1146,6 @@ pmap_pinit(pmap_t pm)
for (i = 0; i < MAXCPU; i++)
pm->pm_context[i] = -1;
pm->pm_active = 0;
TAILQ_INIT(&pm->pm_pvlist);
bzero(&pm->pm_stats, sizeof(pm->pm_stats));
}
@ -1173,8 +1170,6 @@ pmap_release(pmap_t pm)
pm->pm_context[PCPU_GET(cpuid)], pm->pm_tsb);
obj = pm->pm_tsb_obj;
KASSERT(obj->ref_count == 1, ("pmap_release: tsbobj ref count != 1"));
KASSERT(TAILQ_EMPTY(&pm->pm_pvlist),
("pmap_release: leaking pv entries"));
KASSERT(pmap_resident_count(pm) == 0,
("pmap_release: resident pages %ld != 0",
pmap_resident_count(pm)));
@ -1617,41 +1612,6 @@ pmap_page_exists_quick(pmap_t pm, vm_page_t m)
void
pmap_remove_pages(pmap_t pm, vm_offset_t sva, vm_offset_t eva)
{
struct tte *tp;
pv_entry_t npv;
pv_entry_t pv;
vm_page_t m;
npv = NULL;
for (pv = TAILQ_FIRST(&pm->pm_pvlist); pv != NULL; pv = npv) {
npv = TAILQ_NEXT(pv, pv_plist);
if (pv->pv_va >= eva || pv->pv_va < sva)
continue;
if ((tp = tsb_tte_lookup(pv->pv_pmap, pv->pv_va)) == NULL)
continue;
/*
* We cannot remove wired pages at this time.
*/
if ((tp->tte_data & TD_WIRED) != 0)
continue;
atomic_clear_long(&tp->tte_data, TD_V);
tp->tte_vpn = 0;
tp->tte_data = 0;
m = pv->pv_m;
pv->pv_pmap->pm_stats.resident_count--;
m->md.pv_list_count--;
pmap_cache_remove(m, pv->pv_va);
TAILQ_REMOVE(&pv->pv_pmap->pm_pvlist, pv, pv_plist);
TAILQ_REMOVE(&m->md.pv_list, pv, pv_list);
if (TAILQ_EMPTY(&m->md.pv_list))
vm_page_flag_clear(m, PG_MAPPED | PG_WRITEABLE);
pv_free(pv);
}
tlb_context_demap(pm);
}
/*

15
sys/sparc64/sparc64/pv.c
View file

@ -109,7 +109,6 @@ pv_insert(pmap_t pm, vm_page_t m, vm_offset_t va)
pv->pv_va = va;
pv->pv_m = m;
pv->pv_pmap = pm;
TAILQ_INSERT_TAIL(&pm->pm_pvlist, pv, pv_plist);
TAILQ_INSERT_TAIL(&m->md.pv_list, pv, pv_list);
m->md.pv_list_count++;
pm->pm_stats.resident_count++;
@ -120,15 +119,9 @@ pv_lookup(pmap_t pm, vm_page_t m, vm_offset_t va)
{
pv_entry_t pv;
if (m != NULL && m->md.pv_list_count < pm->pm_stats.resident_count) {
TAILQ_FOREACH(pv, &m->md.pv_list, pv_list)
if (pm == pv->pv_pmap && va == pv->pv_va)
break;
} else {
TAILQ_FOREACH(pv, &pm->pm_pvlist, pv_plist)
if (va == pv->pv_va)
break;
}
TAILQ_FOREACH(pv, &m->md.pv_list, pv_list)
if (pm == pv->pv_pmap && va == pv->pv_va)
break;
return (pv);
}
@ -144,7 +137,6 @@ pv_remove(pmap_t pm, vm_page_t m, vm_offset_t va)
m->md.pv_list_count--;
pm->pm_stats.resident_count--;
TAILQ_REMOVE(&m->md.pv_list, pv, pv_list);
TAILQ_REMOVE(&pm->pm_pvlist, pv, pv_plist);
if (TAILQ_EMPTY(&m->md.pv_list))
vm_page_flag_clear(m, PG_MAPPED | PG_WRITEABLE);
pv_free(pv);
@ -274,7 +266,6 @@ pv_remove_all(vm_page_t m)
tp->tte_data = 0;
pv->pv_pmap->pm_stats.resident_count--;
m->md.pv_list_count--;
TAILQ_REMOVE(&pv->pv_pmap->pm_pvlist, pv, pv_plist);
TAILQ_REMOVE(&m->md.pv_list, pv, pv_list);
pmap_cache_remove(pv->pv_m, pv->pv_va);
pv_free(pv);