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Fix the shm panic. I mistakenly used the shadow_count to keep the object

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from being split, and instead added an OBJ_NOSPLIT.
This commit is contained in:
John Dyson 1998-05-04 17:12:53 +00:00
parent b03605afba
commit 96fb8cf258
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=35694
3 changed files with 7 additions and 7 deletions
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5
sys/kern/sysv_shm.c
View File

@ -1,4 +1,4 @@
/* $Id: sysv_shm.c,v 1.35 1998/03/30 09:50:46 phk Exp $ */
/* $Id: sysv_shm.c,v 1.36 1998/05/04 03:01:37 dyson Exp $ */
/* $NetBSD: sysv_shm.c,v 1.23 1994/07/04 23:25:12 glass Exp $ */
/*
@ -145,7 +145,6 @@ shm_deallocate_segment(shmseg)
size_t size;
shm_handle = shmseg->shm_internal;
shm_handle->shm_object->shadow_count--;
vm_object_deallocate(shm_handle->shm_object);
free((caddr_t)shm_handle, M_SHM);
shmseg->shm_internal = NULL;
@ -504,8 +503,8 @@ shmget_allocate_segment(p, uap, mode)
shm_handle->shm_object =
vm_pager_allocate(OBJT_SWAP, 0, OFF_TO_IDX(size),
VM_PROT_DEFAULT, 0);
shm_handle->shm_object->shadow_count++;
shm_handle->shm_object->flags &= ~OBJ_ONEMAPPING;
shm_handle->shm_object->flags |= OBJ_NOSPLIT;
shmseg->shm_internal = shm_handle;
shmseg->shm_perm.cuid = shmseg->shm_perm.uid = cred->cr_uid;

6
sys/vm/vm_map.c
View File

@ -61,7 +61,7 @@
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
* $Id: vm_map.c,v 1.123 1998/05/02 06:36:16 dyson Exp $
* $Id: vm_map.c,v 1.124 1998/05/04 03:01:44 dyson Exp $
*/
/*
@ -1832,7 +1832,7 @@ vm_map_delete(map, start, end)
} else {
pmap_remove(map->pmap, s, e);
if (object &&
(object->flags & OBJ_ONEMAPPING) &&
((object->flags & (OBJ_NOSPLIT|OBJ_ONEMAPPING)) == OBJ_ONEMAPPING) &&
((object->type == OBJT_SWAP) || (object->type == OBJT_DEFAULT))) {
vm_object_collapse(object);
vm_object_page_remove(object, offidxstart, offidxend, FALSE);
@ -2051,7 +2051,7 @@ vm_map_copy_entry(src_map, dst_map, src_entry, dst_entry)
(src_object->type == OBJT_DEFAULT ||
src_object->type == OBJT_SWAP)) {
vm_object_collapse(src_object);
if (src_object->flags & OBJ_ONEMAPPING) {
if ((src_object->flags & (OBJ_NOSPLIT|OBJ_ONEMAPPING)) == OBJ_ONEMAPPING) {
vm_map_split(src_entry);
src_map->timestamp++;
src_object = src_entry->object.vm_object;

3
sys/vm/vm_object.h
View File

@ -61,7 +61,7 @@
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
* $Id: vm_object.h,v 1.47 1998/03/07 21:37:09 dyson Exp $
* $Id: vm_object.h,v 1.48 1998/04/29 04:28:12 dyson Exp $
*/
/*
@ -128,6 +128,7 @@ struct vm_object {
*/
#define OBJ_ACTIVE 0x0004 /* active objects */
#define OBJ_DEAD 0x0008 /* dead objects (during rundown) */
#define OBJ_NOSPLIT 0x0010 /* dont split this object */
#define OBJ_PIPWNT 0x0040 /* paging in progress wanted */
#define OBJ_WRITEABLE 0x0080 /* object has been made writable */
#define OBJ_MIGHTBEDIRTY 0x0100 /* object might be dirty */