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Two changes:

Browse Source 
Remove more (redundant) map timestamp increments from properly
synchronized routines.  (Changed: vm_map_entry_link, vm_map_entry_unlink,
and vm_map_pageable.)

Micro-optimize vm_map_entry_link and vm_map_entry_unlink, eliminating
unnecessary dereferences.  At the same time, converted them from macros
to inline functions.
This commit is contained in:
Alan Cox 1999-03-21 23:37:00 +00:00
parent 8abc4f6dad
commit 99c81ca94d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=44928
1 changed files with 24 additions and 19 deletions
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43
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 1.156 1999/03/09 08:00:17 alc Exp $
* $Id: vm_map.c,v 1.157 1999/03/15 06:24:52 alc Exp $
*/
/*
@ -318,22 +318,29 @@ vm_map_entry_create(map)
*
* Insert/remove entries from maps.
*/
#define vm_map_entry_link(map, after_where, entry) \
{ \
(map)->nentries++; \
(map)->timestamp++; \
(entry)->prev = (after_where); \
(entry)->next = (after_where)->next; \
(entry)->prev->next = (entry); \
(entry)->next->prev = (entry); \
}
#define vm_map_entry_unlink(map, entry) \
{ \
(map)->nentries--; \
(map)->timestamp++; \
(entry)->next->prev = (entry)->prev; \
(entry)->prev->next = (entry)->next; \
}
static __inline void
vm_map_entry_link(vm_map_t map,
vm_map_entry_t after_where,
vm_map_entry_t entry)
{
map->nentries++;
entry->prev = after_where;
entry->next = after_where->next;
entry->next->prev = entry;
after_where->next = entry;
}
static __inline void
vm_map_entry_unlink(vm_map_t map,
vm_map_entry_t entry)
{
vm_map_entry_t prev = entry->prev;
vm_map_entry_t next = entry->next;
next->prev = prev;
prev->next = next;
map->nentries--;
}
/*
* SAVE_HINT:
@ -1679,7 +1686,6 @@ vm_map_pageable(map, start, end, new_pageable)
entry->wired_count--;
entry = entry->prev;
}
map->timestamp++;
vm_map_unlock(map);
return (KERN_INVALID_ARGUMENT);
}
@ -1748,7 +1754,6 @@ vm_map_pageable(map, start, end, new_pageable)
vm_map_unlock(map);
map->timestamp++;
return (KERN_SUCCESS);
}