git: bcd85e0150c9 - main - vm_page: make iter_insert() public
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Date: Fri, 09 May 2025 04:14:36 UTC
The branch main has been updated by dougm: URL: https://cgit.FreeBSD.org/src/commit/?id=bcd85e0150c903848f6e0d54f5428931c2f2d575 commit bcd85e0150c903848f6e0d54f5428931c2f2d575 Author: Doug Moore <dougm@FreeBSD.org> AuthorDate: 2025-05-09 04:13:32 +0000 Commit: Doug Moore <dougm@FreeBSD.org> CommitDate: 2025-05-09 04:13:32 +0000 vm_page: make iter_insert() public In places where vm_page_insert() is used after lookups, or for consecutive pages, use vm_page_iter_insert instead, to exploit locality. Reviewed by: kib, markj Differential Revision: https://reviews.freebsd.org/D50248 --- sys/amd64/sgx/sgx.c | 62 ++++++++++++++--------------- sys/arm/nvidia/drm2/tegra_bo.c | 4 +- sys/compat/linuxkpi/common/src/linux_page.c | 11 +++-- sys/dev/drm2/ttm/ttm_bo_vm.c | 9 +++-- sys/vm/vm_page.c | 2 +- sys/vm/vm_page.h | 2 + 6 files changed, 50 insertions(+), 40 deletions(-) diff --git a/sys/amd64/sgx/sgx.c b/sys/amd64/sgx/sgx.c index af8adb763214..60209b04f31f 100644 --- a/sys/amd64/sgx/sgx.c +++ b/sys/amd64/sgx/sgx.c @@ -191,9 +191,20 @@ sgx_put_epc_page(struct sgx_softc *sc, struct epc_page *epc) vmem_free(sc->vmem_epc, addr, PAGE_SIZE); } +static void +sgx_insert_epc_page_by_index(vm_page_t page, vm_object_t object, + vm_pindex_t pidx, struct pctrie_iter *pages) +{ + + VM_OBJECT_ASSERT_WLOCKED(object); + + page->valid = VM_PAGE_BITS_ALL; + vm_page_iter_insert(page, object, pidx, pages); +} + static int sgx_va_slot_init_by_index(struct sgx_softc *sc, vm_object_t object, - uint64_t idx) + uint64_t idx, struct pctrie_iter *pages) { struct epc_page *epc; vm_page_t page; @@ -202,7 +213,7 @@ sgx_va_slot_init_by_index(struct sgx_softc *sc, vm_object_t object, VM_OBJECT_ASSERT_WLOCKED(object); - p = vm_page_lookup(object, idx); + p = vm_radix_iter_lookup(pages, idx); if (p == NULL) { ret = sgx_get_epc_page(sc, &epc); if (ret) { @@ -216,20 +227,16 @@ sgx_va_slot_init_by_index(struct sgx_softc *sc, vm_object_t object, mtx_unlock(&sc->mtx_encls); page = PHYS_TO_VM_PAGE(epc->phys); - - page->valid = VM_PAGE_BITS_ALL; - vm_page_insert(page, object, idx); + sgx_insert_epc_page_by_index(page, object, idx, pages); } return (0); } static int -sgx_va_slot_init(struct sgx_softc *sc, - struct sgx_enclave *enclave, - uint64_t addr) +sgx_va_slot_init(struct sgx_softc *sc, struct sgx_enclave *enclave, + vm_pindex_t pidx, struct pctrie_iter *pages) { - vm_pindex_t pidx; uint64_t va_page_idx; uint64_t idx; vm_object_t object; @@ -239,12 +246,10 @@ sgx_va_slot_init(struct sgx_softc *sc, VM_OBJECT_ASSERT_WLOCKED(object); - pidx = OFF_TO_IDX(addr); - va_page_idx = pidx / SGX_VA_PAGE_SLOTS; idx = - SGX_VA_PAGES_OFFS - va_page_idx; - ret = sgx_va_slot_init_by_index(sc, object, idx); + ret = sgx_va_slot_init_by_index(sc, object, idx, pages); return (ret); } @@ -614,19 +619,8 @@ static struct cdev_pager_ops sgx_pg_ops = { }; static void -sgx_insert_epc_page_by_index(vm_page_t page, vm_object_t object, - vm_pindex_t pidx) -{ - - VM_OBJECT_ASSERT_WLOCKED(object); - - page->valid = VM_PAGE_BITS_ALL; - vm_page_insert(page, object, pidx); -} - -static void -sgx_insert_epc_page(struct sgx_enclave *enclave, - struct epc_page *epc, uint64_t addr) +sgx_insert_epc_page(struct sgx_enclave *enclave, struct epc_page *epc, + uint64_t addr, struct pctrie_iter *pages) { vm_pindex_t pidx; vm_page_t page; @@ -636,12 +630,13 @@ sgx_insert_epc_page(struct sgx_enclave *enclave, pidx = OFF_TO_IDX(addr); page = PHYS_TO_VM_PAGE(epc->phys); - sgx_insert_epc_page_by_index(page, enclave->object, pidx); + sgx_insert_epc_page_by_index(page, enclave->object, pidx, pages); } static int sgx_ioctl_create(struct sgx_softc *sc, struct sgx_enclave_create *param) { + struct pctrie_iter pages; struct sgx_vm_handle *vmh; vm_map_entry_t entry; vm_page_t p; @@ -712,8 +707,9 @@ sgx_ioctl_create(struct sgx_softc *sc, struct sgx_enclave_create *param) } enclave->secs_epc_page = epc; + vm_page_iter_init(&pages, object); VM_OBJECT_WLOCK(object); - p = vm_page_lookup(object, SGX_SECS_VM_OBJECT_INDEX); + p = vm_radix_iter_lookup(&pages, SGX_SECS_VM_OBJECT_INDEX); if (p) { VM_OBJECT_WUNLOCK(object); /* SECS page already added. */ @@ -722,7 +718,7 @@ sgx_ioctl_create(struct sgx_softc *sc, struct sgx_enclave_create *param) } ret = sgx_va_slot_init_by_index(sc, object, - - SGX_VA_PAGES_OFFS - SGX_SECS_VM_OBJECT_INDEX); + - SGX_VA_PAGES_OFFS - SGX_SECS_VM_OBJECT_INDEX, &pages); if (ret) { VM_OBJECT_WUNLOCK(object); dprintf("%s: Can't init va slot.\n", __func__); @@ -762,7 +758,7 @@ sgx_ioctl_create(struct sgx_softc *sc, struct sgx_enclave_create *param) page = PHYS_TO_VM_PAGE(epc->phys); sgx_insert_epc_page_by_index(page, enclave->object, - SGX_SECS_VM_OBJECT_INDEX); + SGX_SECS_VM_OBJECT_INDEX, &pages); VM_OBJECT_WUNLOCK(object); @@ -786,6 +782,7 @@ static int sgx_ioctl_add_page(struct sgx_softc *sc, struct sgx_enclave_add_page *addp) { + struct pctrie_iter pages; struct epc_page *secs_epc_page; struct sgx_enclave *enclave; struct sgx_vm_handle *vmh; @@ -857,8 +854,9 @@ sgx_ioctl_add_page(struct sgx_softc *sc, addr = (addp->addr - vmh->base); pidx = OFF_TO_IDX(addr); + vm_page_iter_init(&pages, object); VM_OBJECT_WLOCK(object); - p = vm_page_lookup(object, pidx); + p = vm_radix_iter_lookup(&pages, pidx); if (p) { VM_OBJECT_WUNLOCK(object); /* Page already added. */ @@ -866,7 +864,7 @@ sgx_ioctl_add_page(struct sgx_softc *sc, goto error; } - ret = sgx_va_slot_init(sc, enclave, addr); + ret = sgx_va_slot_init(sc, enclave, pidx, &pages); if (ret) { VM_OBJECT_WUNLOCK(object); dprintf("%s: Can't init va slot.\n", __func__); @@ -898,7 +896,7 @@ sgx_ioctl_add_page(struct sgx_softc *sc, goto error; } - sgx_insert_epc_page(enclave, epc, addr); + sgx_insert_epc_page(enclave, epc, addr, &pages); VM_OBJECT_WUNLOCK(object); diff --git a/sys/arm/nvidia/drm2/tegra_bo.c b/sys/arm/nvidia/drm2/tegra_bo.c index 8952d09eec3d..73ba82f2f883 100644 --- a/sys/arm/nvidia/drm2/tegra_bo.c +++ b/sys/arm/nvidia/drm2/tegra_bo.c @@ -133,6 +133,7 @@ retry: static int tegra_bo_init_pager(struct tegra_bo *bo) { + struct pctrie_iter pages; vm_page_t m; size_t size; int i; @@ -143,6 +144,7 @@ tegra_bo_init_pager(struct tegra_bo *bo) if (vmem_alloc(kernel_arena, size, M_WAITOK | M_BESTFIT, &bo->vbase)) return (ENOMEM); + vm_page_iter_init(&pages, bo->cdev_pager); VM_OBJECT_WLOCK(bo->cdev_pager); for (i = 0; i < bo->npages; i++) { m = bo->m[i]; @@ -159,7 +161,7 @@ tegra_bo_init_pager(struct tegra_bo *bo) */ m->oflags &= ~VPO_UNMANAGED; m->flags |= PG_FICTITIOUS; - if (vm_page_insert(m, bo->cdev_pager, i) != 0) + if (vm_page_iter_insert(m, bo->cdev_pager, i, &pages) != 0) return (EINVAL); } VM_OBJECT_WUNLOCK(bo->cdev_pager); diff --git a/sys/compat/linuxkpi/common/src/linux_page.c b/sys/compat/linuxkpi/common/src/linux_page.c index b5a0d34a6ad7..93aaea01f0df 100644 --- a/sys/compat/linuxkpi/common/src/linux_page.c +++ b/sys/compat/linuxkpi/common/src/linux_page.c @@ -296,23 +296,27 @@ vm_fault_t lkpi_vmf_insert_pfn_prot_locked(struct vm_area_struct *vma, unsigned long addr, unsigned long pfn, pgprot_t prot) { + struct pctrie_iter pages; vm_object_t vm_obj = vma->vm_obj; vm_object_t tmp_obj; vm_page_t page; vm_pindex_t pindex; VM_OBJECT_ASSERT_WLOCKED(vm_obj); + vm_page_iter_init(&pages, vm_obj); pindex = OFF_TO_IDX(addr - vma->vm_start); if (vma->vm_pfn_count == 0) vma->vm_pfn_first = pindex; MPASS(pindex <= OFF_TO_IDX(vma->vm_end)); retry: - page = vm_page_grab(vm_obj, pindex, VM_ALLOC_NOCREAT); + page = vm_page_grab_iter(vm_obj, pindex, VM_ALLOC_NOCREAT, &pages); if (page == NULL) { page = PHYS_TO_VM_PAGE(IDX_TO_OFF(pfn)); - if (!vm_page_busy_acquire(page, VM_ALLOC_WAITFAIL)) + if (!vm_page_busy_acquire(page, VM_ALLOC_WAITFAIL)) { + pctrie_iter_reset(&pages); goto retry; + } if (page->object != NULL) { tmp_obj = page->object; vm_page_xunbusy(page); @@ -336,10 +340,11 @@ retry: vm_page_remove(page); } VM_OBJECT_WUNLOCK(tmp_obj); + pctrie_iter_reset(&pages); VM_OBJECT_WLOCK(vm_obj); goto retry; } - if (vm_page_insert(page, vm_obj, pindex)) { + if (vm_page_iter_insert(page, vm_obj, pindex, &pages) != 0) { vm_page_xunbusy(page); return (VM_FAULT_OOM); } diff --git a/sys/dev/drm2/ttm/ttm_bo_vm.c b/sys/dev/drm2/ttm/ttm_bo_vm.c index 38575fc8a74b..b10c5f87a394 100644 --- a/sys/dev/drm2/ttm/ttm_bo_vm.c +++ b/sys/dev/drm2/ttm/ttm_bo_vm.c @@ -100,7 +100,7 @@ static int ttm_bo_vm_fault(vm_object_t vm_obj, vm_ooffset_t offset, int prot, vm_page_t *mres) { - + struct pctrie_iter pages; struct ttm_buffer_object *bo = vm_obj->handle; struct ttm_bo_device *bdev = bo->bdev; struct ttm_tt *ttm = NULL; @@ -114,6 +114,7 @@ ttm_bo_vm_fault(vm_object_t vm_obj, vm_ooffset_t offset, if (*mres != NULL) { (void)vm_page_remove(*mres); } + vm_page_iter_init(&pages, vm_obj); retry: VM_OBJECT_WUNLOCK(vm_obj); m = NULL; @@ -234,10 +235,12 @@ reserve: ttm_bo_unreserve(bo); goto retry; } - m1 = vm_page_lookup(vm_obj, OFF_TO_IDX(offset)); + pctrie_iter_reset(&pages); + m1 = vm_radix_iter_lookup(&pages, OFF_TO_IDX(offset)); /* XXX This looks like it should just be vm_page_replace? */ if (m1 == NULL) { - if (vm_page_insert(m, vm_obj, OFF_TO_IDX(offset))) { + if (vm_page_iter_insert( + m, vm_obj, OFF_TO_IDX(offset), &pages) != 0) { vm_page_xunbusy(m); VM_OBJECT_WUNLOCK(vm_obj); vm_wait(vm_obj); diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c index 9ef9da737ded..8e32da5ea610 100644 --- a/sys/vm/vm_page.c +++ b/sys/vm/vm_page.c @@ -1532,7 +1532,7 @@ vm_page_insert(vm_page_t m, vm_object_t object, vm_pindex_t pindex) * * The object must be locked. */ -static int +int vm_page_iter_insert(vm_page_t m, vm_object_t object, vm_pindex_t pindex, struct pctrie_iter *pages) { diff --git a/sys/vm/vm_page.h b/sys/vm/vm_page.h index 3d7257644ef6..6c1826bc68e6 100644 --- a/sys/vm/vm_page.h +++ b/sys/vm/vm_page.h @@ -653,6 +653,8 @@ int vm_page_insert (vm_page_t, vm_object_t, vm_pindex_t); void vm_page_invalid(vm_page_t m); void vm_page_iter_free(struct pctrie_iter *pages, vm_page_t m); void vm_page_iter_init(struct pctrie_iter *, vm_object_t); +int vm_page_iter_insert(vm_page_t m, vm_object_t, vm_pindex_t, + struct pctrie_iter *); void vm_page_iter_limit_init(struct pctrie_iter *, vm_object_t, vm_pindex_t); bool vm_page_iter_remove(struct pctrie_iter *pages, vm_page_t m); bool vm_page_iter_rename(struct pctrie_iter *old_pages, vm_page_t m,