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ocfs2: add extent block stealing for ocfs2 v5

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This patch add extent block (metadata) stealing mechanism for
extent allocation. This mechanism is same as the inode stealing.
if no room in slot specific extent_alloc, we will try to
allocate extent block from the next slot.

Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
Acked-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
This commit is contained in:
Tiger Yang
2010-01-25 14:11:06 +08:00
committed by Joel Becker
parent a5f28ae4df
commit b89c54282d
9 changed files with 150 additions and 78 deletions
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1
fs/ocfs2/suballoc.h
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@@ -56,6 +56,7 @@ struct ocfs2_alloc_context {
is the same as ~0 - unlimited */
};
void ocfs2_init_steal_slots(struct ocfs2_super *osb);
void ocfs2_free_alloc_context(struct ocfs2_alloc_context *ac);
static inline int ocfs2_alloc_context_bits_left(struct ocfs2_alloc_context *ac)
{