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Use vm_page_unwire_noq() instead of directly modifying page wire counts.

Browse source 
No functional change intended.

Reviewed by:	alc, kib (previous revision)
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D14266
This commit is contained in:
Mark Johnston 2018-02-08 19:28:51 +00:00
parent 509f85cf99
commit ab7c09f121
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=329023
10 changed files with 23 additions and 58 deletions
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22
sys/amd64/amd64/pmap.c
View file

@ -2723,8 +2723,7 @@ _pmap_allocpte(pmap_t pmap, vm_pindex_t ptepindex, struct rwlock **lockp)
/* Have to allocate a new pdp, recurse */
if (_pmap_allocpte(pmap, NUPDE + NUPDPE + pml4index,
lockp) == NULL) {
--m->wire_count;
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
vm_page_unwire_noq(m);
vm_page_free_zero(m);
return (NULL);
}
@ -2756,8 +2755,7 @@ _pmap_allocpte(pmap_t pmap, vm_pindex_t ptepindex, struct rwlock **lockp)
/* Have to allocate a new pd, recurse */
if (_pmap_allocpte(pmap, NUPDE + pdpindex,
lockp) == NULL) {
--m->wire_count;
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
vm_page_unwire_noq(m);
vm_page_free_zero(m);
return (NULL);
}
@ -2770,9 +2768,7 @@ _pmap_allocpte(pmap_t pmap, vm_pindex_t ptepindex, struct rwlock **lockp)
/* Have to allocate a new pd, recurse */
if (_pmap_allocpte(pmap, NUPDE + pdpindex,
lockp) == NULL) {
--m->wire_count;
atomic_subtract_int(&vm_cnt.v_wire_count,
1);
vm_page_unwire_noq(m);
vm_page_free_zero(m);
return (NULL);
}
@ -2904,18 +2900,16 @@ pmap_release(pmap_t pmap)
pmap->pm_pml4[DMPML4I + i] = 0;
pmap->pm_pml4[PML4PML4I] = 0; /* Recursive Mapping */
m->wire_count--;
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
vm_page_unwire_noq(m);
vm_page_free_zero(m);
if (pmap->pm_pml4u != NULL) {
m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t)pmap->pm_pml4u));
m->wire_count--;
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
vm_page_unwire_noq(m);
vm_page_free(m);
}
}
static int
kvm_size(SYSCTL_HANDLER_ARGS)
{
@ -7711,10 +7705,8 @@ pmap_pti_free_page(vm_page_t m)
{
KASSERT(m->wire_count > 0, ("page %p not wired", m));
m->wire_count--;
if (m->wire_count != 0)
if (!vm_page_unwire_noq(m))
return (false);
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
vm_page_free_zero(m);
return (true);
}

3
sys/amd64/amd64/uma_machdep.c
View file

@ -74,7 +74,6 @@ uma_small_free(void *mem, vm_size_t size, u_int8_t flags)
pa = DMAP_TO_PHYS((vm_offset_t)mem);
dump_drop_page(pa);
m = PHYS_TO_VM_PAGE(pa);
m->wire_count--;
vm_page_unwire_noq(m);
vm_page_free(m);
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
}

22
sys/arm64/arm64/pmap.c
View file

@ -1362,12 +1362,7 @@ _pmap_unwire_l3(pmap_t pmap, vm_offset_t va, vm_page_t m, struct spglist *free)
}
pmap_invalidate_page(pmap, va);
/*
* This is a release store so that the ordinary store unmapping
* the page table page is globally performed before TLB shoot-
* down is begun.
*/
atomic_subtract_rel_int(&vm_cnt.v_wire_count, 1);
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
/*
* Put page on a list so that it is released after
@ -1493,9 +1488,7 @@ _pmap_alloc_l3(pmap_t pmap, vm_pindex_t ptepindex, struct rwlock **lockp)
/* recurse for allocating page dir */
if (_pmap_alloc_l3(pmap, NUL2E + NUL1E + l0index,
lockp) == NULL) {
--m->wire_count;
/* XXX: release mem barrier? */
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
vm_page_unwire_noq(m);
vm_page_free_zero(m);
return (NULL);
}
@ -1521,8 +1514,7 @@ _pmap_alloc_l3(pmap_t pmap, vm_pindex_t ptepindex, struct rwlock **lockp)
/* recurse for allocating page dir */
if (_pmap_alloc_l3(pmap, NUL2E + l1index,
lockp) == NULL) {
--m->wire_count;
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
vm_page_unwire_noq(m);
vm_page_free_zero(m);
return (NULL);
}
@ -1537,10 +1529,7 @@ _pmap_alloc_l3(pmap_t pmap, vm_pindex_t ptepindex, struct rwlock **lockp)
/* recurse for allocating page dir */
if (_pmap_alloc_l3(pmap, NUL2E + l1index,
lockp) == NULL) {
--m->wire_count;
/* XXX: release mem barrier? */
atomic_subtract_int(
&vm_cnt.v_wire_count, 1);
vm_page_unwire_noq(m);
vm_page_free_zero(m);
return (NULL);
}
@ -1648,8 +1637,7 @@ pmap_release(pmap_t pmap)
m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t)pmap->pm_l0));
m->wire_count--;
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
vm_page_unwire_noq(m);
vm_page_free_zero(m);
}

3
sys/arm64/arm64/uma_machdep.c
View file

@ -72,7 +72,6 @@ uma_small_free(void *mem, vm_size_t size, u_int8_t flags)
pa = DMAP_TO_PHYS((vm_offset_t)mem);
dump_drop_page(pa);
m = PHYS_TO_VM_PAGE(pa);
m->wire_count--;
vm_page_unwire_noq(m);
vm_page_free(m);
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
}

3
sys/i386/i386/pmap.c
View file

@ -2057,10 +2057,9 @@ pmap_release(pmap_t pmap)
KASSERT(VM_PAGE_TO_PHYS(m) == (pmap->pm_pdpt[i] & PG_FRAME),
("pmap_release: got wrong ptd page"));
#endif
m->wire_count--;
vm_page_unwire_noq(m);
vm_page_free_zero(m);
}
atomic_subtract_int(&vm_cnt.v_wire_count, NPGPTD);
}
static int

6
sys/mips/mips/pmap.c
View file

@ -1159,8 +1159,7 @@ _pmap_allocpte(pmap_t pmap, unsigned ptepindex, u_int flags)
if (_pmap_allocpte(pmap, NUPDE + segindex,
flags) == NULL) {
/* alloc failed, release current */
--m->wire_count;
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
vm_page_unwire_noq(m);
vm_page_free_zero(m);
return (NULL);
}
@ -1238,8 +1237,7 @@ pmap_release(pmap_t pmap)
ptdva = (vm_offset_t)pmap->pm_segtab;
ptdpg = PHYS_TO_VM_PAGE(MIPS_DIRECT_TO_PHYS(ptdva));
ptdpg->wire_count--;
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
vm_page_unwire_noq(ptdpg);
vm_page_free_zero(ptdpg);
}

3
sys/mips/mips/uma_machdep.c
View file

@ -94,7 +94,6 @@ uma_small_free(void *mem, vm_size_t size, u_int8_t flags)
pa = MIPS_DIRECT_TO_PHYS((vm_offset_t)mem);
dump_drop_page(pa);
m = PHYS_TO_VM_PAGE(pa);
m->wire_count--;
vm_page_unwire_noq(m);
vm_page_free(m);
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
}

3
sys/powerpc/powerpc/uma_machdep.c
View file

@ -95,8 +95,7 @@ uma_small_free(void *mem, vm_size_t size, u_int8_t flags)
(vm_offset_t)mem + PAGE_SIZE);
m = PHYS_TO_VM_PAGE((vm_offset_t)mem);
m->wire_count--;
vm_page_unwire_noq(m);
vm_page_free(m);
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
atomic_subtract_int(&hw_uma_mdpages, 1);
}

13
sys/riscv/riscv/pmap.c
View file

@ -1153,12 +1153,7 @@ _pmap_unwire_l3(pmap_t pmap, vm_offset_t va, vm_page_t m, struct spglist *free)
}
pmap_invalidate_page(pmap, va);
/*
* This is a release store so that the ordinary store unmapping
* the page table page is globally performed before TLB shoot-
* down is begun.
*/
atomic_subtract_rel_int(&vm_cnt.v_wire_count, 1);
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
/*
* Put page on a list so that it is released after
@ -1302,8 +1297,7 @@ _pmap_alloc_l3(pmap_t pmap, vm_pindex_t ptepindex, struct rwlock **lockp)
/* recurse for allocating page dir */
if (_pmap_alloc_l3(pmap, NUPDE + l1index,
lockp) == NULL) {
--m->wire_count;
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
vm_page_unwire_noq(m);
vm_page_free_zero(m);
return (NULL);
}
@ -1388,8 +1382,7 @@ pmap_release(pmap_t pmap)
pmap->pm_stats.resident_count));
m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t)pmap->pm_l1));
m->wire_count--;
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
vm_page_unwire_noq(m);
vm_page_free_zero(m);
/* Remove pmap from the allpmaps list */

3
sys/sparc64/sparc64/vm_machdep.c
View file

@ -429,9 +429,8 @@ uma_small_free(void *mem, vm_size_t size, u_int8_t flags)
PMAP_STATS_INC(uma_nsmall_free);
m = PHYS_TO_VM_PAGE(TLB_DIRECT_TO_PHYS((vm_offset_t)mem));
m->wire_count--;
vm_page_unwire_noq(m);
vm_page_free(m);
atomic_subtract_int(&vm_cnt.v_wire_count, 1);
}
void