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Replace all uses of the vm page queues lock by a new R/W lock.

Browse Source 
Unfortunately, this lock cannot be defined as static under Xen because it
is (ab)used to serialize queued page table changes.

Tested by:	sbruno
This commit is contained in:
Alan Cox 2012-10-12 23:26:00 +00:00
parent b79d36786c
commit c1a16a1fb2
3 changed files with 80 additions and 61 deletions
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6
sys/i386/xen/mp_machdep.c
View File

@ -64,6 +64,7 @@ __FBSDID("$FreeBSD$");
#include <sys/mutex.h>
#include <sys/pcpu.h>
#include <sys/proc.h>
#include <sys/rwlock.h>
#include <sys/sched.h>
#include <sys/smp.h>
#include <sys/sysctl.h>
@ -804,6 +805,7 @@ smp_trap_init(trap_info_t *trap_ctxt)
}
}
extern struct rwlock pvh_global_lock;
extern int nkpt;
static void
cpu_initialize_context(unsigned int cpu)
@ -862,7 +864,7 @@ cpu_initialize_context(unsigned int cpu)
xen_pgdpt_pin(VM_PAGE_TO_MACH(m[NPGPTD + 1]));
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
for (i = 0; i < 4; i++) {
int pdir = (PTDPTDI + i) / NPDEPG;
int curoffset = (PTDPTDI + i) % NPDEPG;
@ -872,7 +874,7 @@ cpu_initialize_context(unsigned int cpu)
ma[i]);
}
PT_UPDATES_FLUSH();
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
memset(&ctxt, 0, sizeof(ctxt));
ctxt.flags = VGCF_IN_KERNEL;

130
sys/i386/xen/pmap.c
View File

@ -111,6 +111,7 @@ __FBSDID("$FreeBSD$");
#include <sys/msgbuf.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/rwlock.h>
#include <sys/sf_buf.h>
#include <sys/sx.h>
#include <sys/vmmeter.h>
@ -219,6 +220,13 @@ static SYSCTL_NODE(_vm, OID_AUTO, pmap, CTLFLAG_RD, 0, "VM/pmap parameters");
static int pat_works; /* Is page attribute table sane? */
/*
* This lock is defined as static in other pmap implementations. It cannot,
* however, be defined as static here, because it is (ab)used to serialize
* queued page table changes in other sources files.
*/
struct rwlock pvh_global_lock;
/*
* Data for the pv entry allocation mechanism
*/
@ -380,6 +388,12 @@ pmap_bootstrap(vm_paddr_t firstaddr)
#endif
CPU_FILL(&kernel_pmap->pm_active); /* don't allow deactivation */
TAILQ_INIT(&kernel_pmap->pm_pvchunk);
/*
* Initialize the global pv list lock.
*/
rw_init_flags(&pvh_global_lock, "pmap pv global", RW_RECURSE);
LIST_INIT(&allpmaps);
mtx_init(&allpmaps_lock, "allpmaps", NULL, MTX_SPIN);
mtx_lock_spin(&allpmaps_lock);
@ -979,9 +993,9 @@ pmap_pte_release(pt_entry_t *pte)
if ((pt_entry_t *)((vm_offset_t)pte & ~PAGE_MASK) == PADDR2) {
CTR1(KTR_PMAP, "pmap_pte_release: pte=0x%jx",
*PMAP2);
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
PT_SET_VA(PMAP2, 0, TRUE);
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
mtx_unlock(&PMAP2mutex);
}
}
@ -1001,7 +1015,7 @@ invlcaddr(void *caddr)
* scans are across different pmaps. It is very wasteful
* to do an entire invltlb for checking a single mapping.
*
* If the given pmap is not the current pmap, vm_page_queue_mtx
* If the given pmap is not the current pmap, pvh_global_lock
* must be held and curthread pinned to a CPU.
*/
static pt_entry_t *
@ -1017,7 +1031,7 @@ pmap_pte_quick(pmap_t pmap, vm_offset_t va)
/* are we current address space or kernel? */
if (pmap_is_current(pmap))
return (vtopte(va));
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
rw_assert(&pvh_global_lock, RA_WLOCKED);
KASSERT(curthread->td_pinned > 0, ("curthread not pinned"));
newpf = *pde & PG_FRAME;
if ((*PMAP1 & PG_FRAME) != newpf) {
@ -1299,7 +1313,7 @@ pmap_qremove(vm_offset_t sva, int count)
CTR2(KTR_PMAP, "pmap_qremove: sva=0x%x count=%d", sva, count);
va = sva;
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
critical_enter();
while (count-- > 0) {
pmap_kremove(va);
@ -1308,7 +1322,7 @@ pmap_qremove(vm_offset_t sva, int count)
PT_UPDATES_FLUSH();
pmap_invalidate_range(kernel_pmap, sva, va);
critical_exit();
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
}
/***************************************************
@ -1511,7 +1525,7 @@ pmap_pinit(pmap_t pmap)
#ifdef PAE
PT_SET_MA(pmap->pm_pdpt, *vtopte((vm_offset_t)pmap->pm_pdpt) & ~PG_RW);
#endif
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
xen_flush_queue();
xen_pgdpt_pin(VM_PAGE_TO_MACH(ptdpg[NPGPTD]));
for (i = 0; i < NPGPTD; i++) {
@ -1519,7 +1533,7 @@ pmap_pinit(pmap_t pmap)
PT_SET_VA_MA(&pmap->pm_pdir[PTDPTDI + i], ma | PG_V | PG_A, FALSE);
}
xen_flush_queue();
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
CPU_ZERO(&pmap->pm_active);
TAILQ_INIT(&pmap->pm_pvchunk);
bzero(&pmap->pm_stats, sizeof pmap->pm_stats);
@ -1551,9 +1565,9 @@ _pmap_allocpte(pmap_t pmap, u_int ptepindex, int flags)
VM_ALLOC_WIRED | VM_ALLOC_ZERO)) == NULL) {
if (flags & M_WAITOK) {
PMAP_UNLOCK(pmap);
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
VM_WAIT;
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
PMAP_LOCK(pmap);
}
@ -1884,14 +1898,14 @@ pmap_growkernel(vm_offset_t addr)
pmap_zero_page(nkpg);
ptppaddr = VM_PAGE_TO_PHYS(nkpg);
newpdir = (pd_entry_t) (ptppaddr | PG_V | PG_RW | PG_A | PG_M);
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
PD_SET_VA(kernel_pmap, (kernel_vm_end >> PDRSHIFT), newpdir, TRUE);
mtx_lock_spin(&allpmaps_lock);
LIST_FOREACH(pmap, &allpmaps, pm_list)
PD_SET_VA(pmap, (kernel_vm_end >> PDRSHIFT), newpdir, TRUE);
mtx_unlock_spin(&allpmaps_lock);
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
kernel_vm_end = (kernel_vm_end + NBPDR) & ~PDRMASK;
if (kernel_vm_end - 1 >= kernel_map->max_offset) {
@ -2094,7 +2108,7 @@ free_pv_entry(pmap_t pmap, pv_entry_t pv)
struct pv_chunk *pc;
int idx, field, bit;
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
rw_assert(&pvh_global_lock, RA_WLOCKED);
PMAP_LOCK_ASSERT(pmap, MA_OWNED);
PV_STAT(pv_entry_frees++);
PV_STAT(pv_entry_spare++);
@ -2154,7 +2168,7 @@ get_pv_entry(pmap_t pmap, boolean_t try)
vm_page_t m;
PMAP_LOCK_ASSERT(pmap, MA_OWNED);
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
rw_assert(&pvh_global_lock, RA_WLOCKED);
PV_STAT(pv_entry_allocs++);
pv_entry_count++;
if (pv_entry_count > pv_entry_high_water)
@ -2224,7 +2238,7 @@ pmap_pvh_remove(struct md_page *pvh, pmap_t pmap, vm_offset_t va)
{
pv_entry_t pv;
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
rw_assert(&pvh_global_lock, RA_WLOCKED);
TAILQ_FOREACH(pv, &pvh->pv_list, pv_list) {
if (pmap == PV_PMAP(pv) && va == pv->pv_va) {
TAILQ_REMOVE(&pvh->pv_list, pv, pv_list);
@ -2248,7 +2262,7 @@ static void
pmap_remove_entry(pmap_t pmap, vm_page_t m, vm_offset_t va)
{
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
rw_assert(&pvh_global_lock, RA_WLOCKED);
pmap_pvh_free(&m->md, pmap, va);
if (TAILQ_EMPTY(&m->md.pv_list))
vm_page_aflag_clear(m, PGA_WRITEABLE);
@ -2263,7 +2277,7 @@ pmap_try_insert_pv_entry(pmap_t pmap, vm_offset_t va, vm_page_t m)
pv_entry_t pv;
PMAP_LOCK_ASSERT(pmap, MA_OWNED);
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
rw_assert(&pvh_global_lock, RA_WLOCKED);
if (pv_entry_count < pv_entry_high_water &&
(pv = get_pv_entry(pmap, TRUE)) != NULL) {
pv->pv_va = va;
@ -2285,7 +2299,7 @@ pmap_remove_pte(pmap_t pmap, pt_entry_t *ptq, vm_offset_t va, vm_page_t *free)
CTR3(KTR_PMAP, "pmap_remove_pte: pmap=%p *ptq=0x%x va=0x%x",
pmap, (u_long)*ptq, va);
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
rw_assert(&pvh_global_lock, RA_WLOCKED);
PMAP_LOCK_ASSERT(pmap, MA_OWNED);
oldpte = *ptq;
PT_SET_VA_MA(ptq, 0, TRUE);
@ -2322,7 +2336,7 @@ pmap_remove_page(pmap_t pmap, vm_offset_t va, vm_page_t *free)
CTR2(KTR_PMAP, "pmap_remove_page: pmap=%p va=0x%x",
pmap, va);
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
rw_assert(&pvh_global_lock, RA_WLOCKED);
KASSERT(curthread->td_pinned > 0, ("curthread not pinned"));
PMAP_LOCK_ASSERT(pmap, MA_OWNED);
if ((pte = pmap_pte_quick(pmap, va)) == NULL || (*pte & PG_V) == 0)
@ -2360,7 +2374,7 @@ pmap_remove(pmap_t pmap, vm_offset_t sva, vm_offset_t eva)
anyvalid = 0;
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
sched_pin();
PMAP_LOCK(pmap);
@ -2437,7 +2451,7 @@ pmap_remove(pmap_t pmap, vm_offset_t sva, vm_offset_t eva)
if (anyvalid)
pmap_invalidate_all(pmap);
sched_unpin();
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
PMAP_UNLOCK(pmap);
pmap_free_zero_pages(free);
}
@ -2466,7 +2480,7 @@ pmap_remove_all(vm_page_t m)
KASSERT((m->oflags & VPO_UNMANAGED) == 0,
("pmap_remove_all: page %p is not managed", m));
free = NULL;
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
sched_pin();
while ((pv = TAILQ_FIRST(&m->md.pv_list)) != NULL) {
pmap = PV_PMAP(pv);
@ -2498,7 +2512,7 @@ pmap_remove_all(vm_page_t m)
if (*PMAP1)
PT_SET_MA(PADDR1, 0);
sched_unpin();
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
pmap_free_zero_pages(free);
}
@ -2533,7 +2547,7 @@ pmap_protect(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot)
anychanged = 0;
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
sched_pin();
PMAP_LOCK(pmap);
for (; sva < eva; sva = pdnxt) {
@ -2617,7 +2631,7 @@ pmap_protect(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot)
if (anychanged)
pmap_invalidate_all(pmap);
sched_unpin();
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
PMAP_UNLOCK(pmap);
}
@ -2658,7 +2672,7 @@ pmap_enter(pmap_t pmap, vm_offset_t va, vm_prot_t access, vm_page_t m,
mpte = NULL;
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
PMAP_LOCK(pmap);
sched_pin();
@ -2831,7 +2845,7 @@ pmap_enter(pmap_t pmap, vm_offset_t va, vm_prot_t access, vm_page_t m,
if (*PMAP1)
PT_SET_VA_MA(PMAP1, 0, TRUE);
sched_unpin();
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
PMAP_UNLOCK(pmap);
}
@ -2861,7 +2875,7 @@ pmap_enter_object(pmap_t pmap, vm_offset_t start, vm_offset_t end,
psize = atop(end - start);
mpte = NULL;
m = m_start;
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
PMAP_LOCK(pmap);
while (m != NULL && (diff = m->pindex - m_start->pindex) < psize) {
mpte = pmap_enter_quick_locked(&mclp, &count, pmap, start + ptoa(diff), m,
@ -2878,7 +2892,7 @@ pmap_enter_object(pmap_t pmap, vm_offset_t start, vm_offset_t end,
error = HYPERVISOR_multicall(mcl, count);
KASSERT(error == 0, ("bad multicall %d", error));
}
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
PMAP_UNLOCK(pmap);
}
@ -2901,12 +2915,12 @@ pmap_enter_quick(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot)
CTR4(KTR_PMAP, "pmap_enter_quick: pmap=%p va=0x%x m=%p prot=0x%x",
pmap, va, m, prot);
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
PMAP_LOCK(pmap);
(void)pmap_enter_quick_locked(&mclp, &count, pmap, va, m, prot, NULL);
if (count)
HYPERVISOR_multicall(&mcl, count);
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
PMAP_UNLOCK(pmap);
}
@ -2952,7 +2966,7 @@ pmap_enter_quick_locked(multicall_entry_t **mclpp, int *count, pmap_t pmap, vm_o
KASSERT(va < kmi.clean_sva || va >= kmi.clean_eva ||
(m->oflags & VPO_UNMANAGED) != 0,
("pmap_enter_quick_locked: managed mapping within the clean submap"));
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
rw_assert(&pvh_global_lock, RA_WLOCKED);
PMAP_LOCK_ASSERT(pmap, MA_OWNED);
/*
@ -3168,7 +3182,7 @@ pmap_change_wiring(pmap_t pmap, vm_offset_t va, boolean_t wired)
{
pt_entry_t *pte;
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
PMAP_LOCK(pmap);
pte = pmap_pte(pmap, va);
@ -3186,7 +3200,7 @@ pmap_change_wiring(pmap_t pmap, vm_offset_t va, boolean_t wired)
*/
pmap_pte_release(pte);
PMAP_UNLOCK(pmap);
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
}
@ -3225,7 +3239,7 @@ pmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_offset_t dst_addr, vm_size_t len,
mtx_lock(&createdelete_lock);
#endif
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
if (dst_pmap < src_pmap) {
PMAP_LOCK(dst_pmap);
PMAP_LOCK(src_pmap);
@ -3315,7 +3329,7 @@ pmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_offset_t dst_addr, vm_size_t len,
out:
PT_UPDATES_FLUSH();
sched_unpin();
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
PMAP_UNLOCK(src_pmap);
PMAP_UNLOCK(dst_pmap);
@ -3451,7 +3465,7 @@ pmap_page_exists_quick(pmap_t pmap, vm_page_t m)
KASSERT((m->oflags & VPO_UNMANAGED) == 0,
("pmap_page_exists_quick: page %p is not managed", m));
rv = FALSE;
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
TAILQ_FOREACH(pv, &m->md.pv_list, pv_list) {
if (PV_PMAP(pv) == pmap) {
rv = TRUE;
@ -3461,7 +3475,7 @@ pmap_page_exists_quick(pmap_t pmap, vm_page_t m)
if (loops >= 16)
break;
}
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
return (rv);
}
@ -3482,7 +3496,7 @@ pmap_page_wired_mappings(vm_page_t m)
count = 0;
if ((m->oflags & VPO_UNMANAGED) != 0)
return (count);
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
sched_pin();
TAILQ_FOREACH(pv, &m->md.pv_list, pv_list) {
pmap = PV_PMAP(pv);
@ -3493,7 +3507,7 @@ pmap_page_wired_mappings(vm_page_t m)
PMAP_UNLOCK(pmap);
}
sched_unpin();
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
return (count);
}
@ -3535,7 +3549,7 @@ pmap_remove_pages(pmap_t pmap)
printf("warning: pmap_remove_pages called with non-current pmap\n");
return;
}
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
KASSERT(pmap_is_current(pmap), ("removing pages from non-current pmap"));
PMAP_LOCK(pmap);
sched_pin();
@ -3615,7 +3629,7 @@ pmap_remove_pages(pmap_t pmap)
sched_unpin();
pmap_invalidate_all(pmap);
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
PMAP_UNLOCK(pmap);
pmap_free_zero_pages(free);
}
@ -3647,7 +3661,7 @@ pmap_is_modified(vm_page_t m)
if ((m->oflags & VPO_BUSY) == 0 &&
(m->aflags & PGA_WRITEABLE) == 0)
return (rv);
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
sched_pin();
TAILQ_FOREACH(pv, &m->md.pv_list, pv_list) {
pmap = PV_PMAP(pv);
@ -3661,7 +3675,7 @@ pmap_is_modified(vm_page_t m)
if (*PMAP1)
PT_SET_MA(PADDR1, 0);
sched_unpin();
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
return (rv);
}
@ -3708,7 +3722,7 @@ pmap_is_referenced(vm_page_t m)
KASSERT((m->oflags & VPO_UNMANAGED) == 0,
("pmap_is_referenced: page %p is not managed", m));
rv = FALSE;
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
sched_pin();
TAILQ_FOREACH(pv, &m->md.pv_list, pv_list) {
pmap = PV_PMAP(pv);
@ -3722,7 +3736,7 @@ pmap_is_referenced(vm_page_t m)
if (*PMAP1)
PT_SET_MA(PADDR1, 0);
sched_unpin();
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
return (rv);
}
@ -3733,9 +3747,9 @@ pmap_map_readonly(pmap_t pmap, vm_offset_t va, int len)
for (i = 0; i < npages; i++) {
pt_entry_t *pte;
pte = pmap_pte(pmap, (vm_offset_t)(va + i*PAGE_SIZE));
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
pte_store(pte, xpmap_mtop(*pte & ~(PG_RW|PG_M)));
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
PMAP_MARK_PRIV(xpmap_mtop(*pte));
pmap_pte_release(pte);
}
@ -3749,9 +3763,9 @@ pmap_map_readwrite(pmap_t pmap, vm_offset_t va, int len)
pt_entry_t *pte;
pte = pmap_pte(pmap, (vm_offset_t)(va + i*PAGE_SIZE));
PMAP_MARK_UNPRIV(xpmap_mtop(*pte));
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
pte_store(pte, xpmap_mtop(*pte) | (PG_RW|PG_M));
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
pmap_pte_release(pte);
}
}
@ -3778,7 +3792,7 @@ pmap_remove_write(vm_page_t m)
if ((m->oflags & VPO_BUSY) == 0 &&
(m->aflags & PGA_WRITEABLE) == 0)
return;
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
sched_pin();
TAILQ_FOREACH(pv, &m->md.pv_list, pv_list) {
pmap = PV_PMAP(pv);
@ -3809,7 +3823,7 @@ pmap_remove_write(vm_page_t m)
if (*PMAP1)
PT_SET_MA(PADDR1, 0);
sched_unpin();
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
}
/*
@ -3834,7 +3848,7 @@ pmap_ts_referenced(vm_page_t m)
KASSERT((m->oflags & VPO_UNMANAGED) == 0,
("pmap_ts_referenced: page %p is not managed", m));
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
sched_pin();
if ((pv = TAILQ_FIRST(&m->md.pv_list)) != NULL) {
pvf = pv;
@ -3859,7 +3873,7 @@ pmap_ts_referenced(vm_page_t m)
if (*PMAP1)
PT_SET_MA(PADDR1, 0);
sched_unpin();
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
return (rtval);
}
@ -3886,7 +3900,7 @@ pmap_clear_modify(vm_page_t m)
*/
if ((m->aflags & PGA_WRITEABLE) == 0)
return;
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
sched_pin();
TAILQ_FOREACH(pv, &m->md.pv_list, pv_list) {
pmap = PV_PMAP(pv);
@ -3904,7 +3918,7 @@ pmap_clear_modify(vm_page_t m)
PMAP_UNLOCK(pmap);
}
sched_unpin();
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
}
/*
@ -3921,7 +3935,7 @@ pmap_clear_reference(vm_page_t m)
KASSERT((m->oflags & VPO_UNMANAGED) == 0,
("pmap_clear_reference: page %p is not managed", m));
vm_page_lock_queues();
rw_wlock(&pvh_global_lock);
sched_pin();
TAILQ_FOREACH(pv, &m->md.pv_list, pv_list) {
pmap = PV_PMAP(pv);
@ -3939,7 +3953,7 @@ pmap_clear_reference(vm_page_t m)
PMAP_UNLOCK(pmap);
}
sched_unpin();
vm_page_unlock_queues();
rw_wunlock(&pvh_global_lock);
}
/*

5
sys/i386/xen/xen_machdep.c
View File

@ -44,6 +44,7 @@ __FBSDID("$FreeBSD$");
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/reboot.h>
#include <sys/rwlock.h>
#include <sys/sysproto.h>
#include <machine/xen/xen-os.h>
@ -428,13 +429,15 @@ _xen_machphys_update(vm_paddr_t mfn, vm_paddr_t pfn, char *file, int line)
critical_exit();
}
extern struct rwlock pvh_global_lock;
void
_xen_queue_pt_update(vm_paddr_t ptr, vm_paddr_t val, char *file, int line)
{
SET_VCPU();
if (__predict_true(gdtset))
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
rw_assert(&pvh_global_lock, RA_WLOCKED);
KASSERT((ptr & 7) == 0, ("misaligned update"));