Work around some VM bugs, the worst being an overly aggressive
swap space free calculation. More complete fixes will be forthcoming, in a week.
This commit is contained in:
parent
b1dd8a7b57
commit
cbd8ec0902
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=35669
@ -1,4 +1,4 @@
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/* $Id: sysv_shm.c,v 1.34 1998/02/09 06:09:25 eivind Exp $ */
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/* $Id: sysv_shm.c,v 1.35 1998/03/30 09:50:46 phk Exp $ */
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/* $NetBSD: sysv_shm.c,v 1.23 1994/07/04 23:25:12 glass Exp $ */
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/*
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@ -145,6 +145,7 @@ shm_deallocate_segment(shmseg)
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size_t size;
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shm_handle = shmseg->shm_internal;
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shm_handle->shm_object->shadow_count--;
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vm_object_deallocate(shm_handle->shm_object);
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free((caddr_t)shm_handle, M_SHM);
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shmseg->shm_internal = NULL;
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@ -503,6 +504,9 @@ shmget_allocate_segment(p, uap, mode)
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shm_handle->shm_object =
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vm_pager_allocate(OBJT_SWAP, 0, OFF_TO_IDX(size),
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VM_PROT_DEFAULT, 0);
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shm_handle->shm_object->shadow_count++;
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shm_handle->shm_object->flags &= ~OBJ_ONEMAPPING;
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shmseg->shm_internal = shm_handle;
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shmseg->shm_perm.cuid = shmseg->shm_perm.uid = cred->cr_uid;
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shmseg->shm_perm.cgid = shmseg->shm_perm.gid = cred->cr_gid;
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@ -39,7 +39,7 @@
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* from: Utah $Hdr: swap_pager.c 1.4 91/04/30$
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*
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* @(#)swap_pager.c 8.9 (Berkeley) 3/21/94
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* $Id: swap_pager.c,v 1.93 1998/04/15 17:47:35 bde Exp $
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* $Id: swap_pager.c,v 1.94 1998/04/29 04:27:59 dyson Exp $
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*/
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/*
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@ -631,7 +631,8 @@ swap_pager_reclaim()
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*/
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void
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swap_pager_copy(srcobject, srcoffset, dstobject, dstoffset, offset, destroysource)
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swap_pager_copy(srcobject, srcoffset, dstobject, dstoffset,
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offset, destroysource)
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vm_object_t srcobject;
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vm_pindex_t srcoffset;
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vm_object_t dstobject;
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@ -651,10 +652,12 @@ swap_pager_copy(srcobject, srcoffset, dstobject, dstoffset, offset, destroysourc
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/*
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* remove the source object from the swap_pager internal queue
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*/
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if (srcobject->handle == NULL) {
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TAILQ_REMOVE(&swap_pager_un_object_list, srcobject, pager_object_list);
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} else {
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TAILQ_REMOVE(&swap_pager_object_list, srcobject, pager_object_list);
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if (destroysource) {
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if (srcobject->handle == NULL) {
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TAILQ_REMOVE(&swap_pager_un_object_list, srcobject, pager_object_list);
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} else {
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TAILQ_REMOVE(&swap_pager_object_list, srcobject, pager_object_list);
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}
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}
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s = splvm();
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@ -673,8 +676,8 @@ swap_pager_copy(srcobject, srcoffset, dstobject, dstoffset, offset, destroysourc
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*/
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for (i = 0; i < dstobject->size; i += 1) {
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int srcvalid, dstvalid;
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daddr_t *srcaddrp = swap_pager_diskaddr(srcobject, i + offset + srcoffset,
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&srcvalid);
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daddr_t *srcaddrp = swap_pager_diskaddr(srcobject,
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i + offset + srcoffset, &srcvalid);
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daddr_t *dstaddrp;
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/*
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@ -66,7 +66,7 @@
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*
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* $Id: vm_fault.c,v 1.81 1998/03/01 04:18:18 dyson Exp $
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* $Id: vm_fault.c,v 1.82 1998/03/07 20:45:47 dyson Exp $
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*/
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/*
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@ -606,7 +606,8 @@ RetryFault:;
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*/
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vm_page_rename(fs.m, fs.first_object, fs.first_pindex);
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fs.first_m = fs.m;
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fs.m->dirty = VM_PAGE_BITS_ALL;
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fs.first_m->dirty = VM_PAGE_BITS_ALL;
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fs.first_m->flags |= PG_BUSY;
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fs.m = NULL;
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cnt.v_cow_optim++;
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} else {
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@ -61,7 +61,7 @@
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*
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* $Id: vm_map.c,v 1.122 1998/05/01 02:25:29 dyson Exp $
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* $Id: vm_map.c,v 1.123 1998/05/02 06:36:16 dyson Exp $
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*/
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/*
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@ -541,6 +541,13 @@ vm_map_insert(vm_map_t map, vm_object_t object, vm_ooffset_t offset,
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new_entry->eflags = protoeflags;
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new_entry->object.vm_object = object;
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new_entry->offset = offset;
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if (object) {
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if ((object->ref_count > 1) || (object->shadow_count != 0)) {
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object->flags &= ~OBJ_ONEMAPPING;
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} else {
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object->flags |= OBJ_ONEMAPPING;
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}
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}
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if (map->is_main_map) {
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new_entry->inheritance = VM_INHERIT_DEFAULT;
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@ -1751,6 +1758,7 @@ vm_map_delete(map, start, end)
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vm_offset_t start;
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vm_offset_t end;
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{
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vm_object_t object;
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vm_map_entry_t entry;
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vm_map_entry_t first_entry;
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@ -1760,9 +1768,9 @@ vm_map_delete(map, start, end)
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if (!vm_map_lookup_entry(map, start, &first_entry)) {
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entry = first_entry->next;
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if (entry->object.vm_object &&
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(entry->object.vm_object->ref_count == 1))
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entry->object.vm_object->flags |= OBJ_ONEMAPPING;
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object = entry->object.vm_object;
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if (object && (object->ref_count == 1) && (object->shadow_count == 0))
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object->flags |= OBJ_ONEMAPPING;
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} else {
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entry = first_entry;
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vm_map_clip_start(map, entry, start);
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@ -1790,20 +1798,17 @@ vm_map_delete(map, start, end)
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while ((entry != &map->header) && (entry->start < end)) {
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vm_map_entry_t next;
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vm_offset_t s, e;
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vm_object_t object;
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vm_pindex_t offidxstart, offidxend;
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vm_ooffset_t offset;
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vm_pindex_t offidxstart, offidxend, count;
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vm_map_clip_end(map, entry, end);
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offset = entry->offset;
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s = entry->start;
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e = entry->end;
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next = entry->next;
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object = entry->object.vm_object;
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offidxstart = OFF_TO_IDX(offset);
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offidxend = offidxstart + OFF_TO_IDX(e - s);
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offidxstart = OFF_TO_IDX(entry->offset);
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count = OFF_TO_IDX(e - s);
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object = entry->object.vm_object;
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/*
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* Unwire before removing addresses from the pmap; otherwise,
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@ -1813,6 +1818,7 @@ vm_map_delete(map, start, end)
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vm_map_entry_unwire(map, entry);
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}
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offidxend = offidxstart + count;
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/*
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* If this is a sharing map, we must remove *all* references
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* to this data, since we can't find all of the physical maps
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@ -1831,10 +1837,12 @@ vm_map_delete(map, start, end)
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vm_object_collapse(object);
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vm_object_page_remove(object, offidxstart, offidxend, FALSE);
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if (object->type == OBJT_SWAP) {
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swap_pager_freespace(object, offidxstart, offidxend);
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swap_pager_freespace(object, offidxstart, count);
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}
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if (object->size <= offidxend) {
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object->size = offidxstart;
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if ((offidxend >= object->size) &&
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(offidxstart < object->size)) {
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object->size = offidxstart;
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}
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}
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}
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@ -2045,6 +2053,7 @@ vm_map_copy_entry(src_map, dst_map, src_entry, dst_entry)
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vm_object_collapse(src_object);
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if (src_object->flags & OBJ_ONEMAPPING) {
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vm_map_split(src_entry);
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src_map->timestamp++;
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src_object = src_entry->object.vm_object;
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}
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}
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@ -2120,7 +2129,6 @@ vmspace_fork(vm1)
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if (object == NULL) {
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object = vm_object_allocate(OBJT_DEFAULT,
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atop(old_entry->end - old_entry->start));
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object->flags &= ~OBJ_ONEMAPPING;
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old_entry->object.vm_object = object;
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old_entry->offset = (vm_offset_t) 0;
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} else if (old_entry->eflags & MAP_ENTRY_NEEDS_COPY) {
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@ -2130,6 +2138,7 @@ vmspace_fork(vm1)
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old_entry->eflags &= ~MAP_ENTRY_NEEDS_COPY;
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object = old_entry->object.vm_object;
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}
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object->flags &= ~OBJ_ONEMAPPING;
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/*
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* Clone the entry, referencing the sharing map.
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@ -2177,6 +2186,7 @@ vmspace_fork(vm1)
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new_map->size = old_map->size;
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vm_map_unlock(old_map);
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old_map->timestamp++;
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return (vm2);
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}
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