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UBIFS: reserve more space for index

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At the moment UBIFS reserves twice old index size space for the
index. But this is not enough in some cases, because if the indexing
node are very fragmented and there are many small gaps, while the
dirty index has big znodes - in-the-gaps method would fail.

Thus, reserve trise as more, in which case we are guaranteed that
we can commit in any case.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
This commit is contained in:
Artem Bityutskiy
2008-07-25 14:38:51 +03:00
parent 1de9415906
commit b364b41aeb
4 changed files with 14 additions and 9 deletions
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2
fs/ubifs/misc.h
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@@ -308,7 +308,7 @@ static inline long long ubifs_reported_space(const struct ubifs_info *c,
{
int divisor, factor;
divisor = UBIFS_MAX_DATA_NODE_SZ + (c->max_idx_node_sz << 1);
divisor = UBIFS_MAX_DATA_NODE_SZ + (c->max_idx_node_sz * 3);
factor = UBIFS_MAX_DATA_NODE_SZ - UBIFS_DATA_NODE_SZ;
do_div(free, divisor);