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Update to onnv_147

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This is the last official OpenSolaris tag before the public
development tree was closed.
This commit is contained in:
Brian Behlendorf
2010-08-26 14:24:34 -07:00
parent 1980602bfa
commit 572e285762
101 changed files with 7835 additions and 2448 deletions
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module/zfs/refcount.c
+33 -2
View File
@@ -25,7 +25,7 @@
#include <sys/zfs_context.h>
#include <sys/refcount.h>
#if defined(DEBUG) || !defined(_KERNEL)
#ifdef ZFS_DEBUG
#ifdef _KERNEL
int reference_tracking_enable = FALSE; /* runs out of memory too easily */
@@ -189,4 +189,35 @@ refcount_remove(refcount_t *rc, void *holder)
return (refcount_remove_many(rc, 1, holder));
}
#endif
void
refcount_transfer(refcount_t *dst, refcount_t *src)
{
int64_t count, removed_count;
list_t list, removed;
list_create(&list, sizeof (reference_t),
offsetof(reference_t, ref_link));
list_create(&removed, sizeof (reference_t),
offsetof(reference_t, ref_link));
mutex_enter(&src->rc_mtx);
count = src->rc_count;
removed_count = src->rc_removed_count;
src->rc_count = 0;
src->rc_removed_count = 0;
list_move_tail(&list, &src->rc_list);
list_move_tail(&removed, &src->rc_removed);
mutex_exit(&src->rc_mtx);
mutex_enter(&dst->rc_mtx);
dst->rc_count += count;
dst->rc_removed_count += removed_count;
list_move_tail(&dst->rc_list, &list);
list_move_tail(&dst->rc_removed, &removed);
mutex_exit(&dst->rc_mtx);
list_destroy(&list);
list_destroy(&removed);
}
#endif /* ZFS_DEBUG */