Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

a mutex on vnode_pager_sync avoids another race condition, only possible if sync were called again while we were sleeping. This should be the last of this nest of bugs. From mycroft.

This commit is contained in:
tls 1997-02-26 02:26:19 +00:00
parent 7cebde0e19
commit fad978b853
1 changed files with 8 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
sys/vm/vnode_pager.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: vnode_pager.c,v 1.29 1997/02/23 08:56:57 mrg Exp $ */
/* $NetBSD: vnode_pager.c,v 1.30 1997/02/26 02:26:19 tls Exp $ */
/*
* Copyright (c) 1990 University of Utah.
@ -62,6 +62,7 @@
struct pagerlst vnode_pager_list; /* list of managed vnodes */
simple_lock_data_t vnode_pager_list_lock;
lock_data_t vnode_pager_sync_lock;
#ifdef DEBUG
int vpagerdebug = 0x00;
@ -107,6 +108,8 @@ vnode_pager_init()
printf("vnode_pager_init()\n");
#endif
TAILQ_INIT(&vnode_pager_list);
simple_lock_init(&vnode_pager_list_lock);
lock_init(&vnode_pager_sync_lock, TRUE);
}
/*
@ -459,6 +462,8 @@ vnode_pager_sync(mp)
vm_object_t object, next_object;
struct object_q object_list;
lock_write(&vnode_pager_sync_lock);
/*
* We do this in two passes:
* 1) We run through the list of pagers, making a list of the objects
@ -501,6 +506,8 @@ vnode_pager_sync(mp)
vm_object_unlock(object);
vm_object_deallocate(object);
}
lock_write_done(&vnode_pager_sync_lock);
}
/*