The code change to Git to support version 2 will be done in subsequent
commits.
Signed-off-by: Jonathan Tan <jonathantanmy@xxxxxxxxxx>
---
Documentation/gitformat-commit-graph.txt | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/Documentation/gitformat-commit-graph.txt b/Documentation/gitformat-commit-graph.txt
index 31cad585e2..9dab222830 100644
--- a/Documentation/gitformat-commit-graph.txt
+++ b/Documentation/gitformat-commit-graph.txt
@@ -142,13 +142,16 @@ All multi-byte numbers are in network byte order.
==== Bloom Filter Data (ID: {'B', 'D', 'A', 'T'}) [Optional]
* It starts with header consisting of three unsigned 32-bit integers:
- - Version of the hash algorithm being used. We currently only support
- value 1 which corresponds to the 32-bit version of the murmur3 hash
+ - Version of the hash algorithm being used. We currently support
+ value 2 which corresponds to the 32-bit version of the murmur3 hash
implemented exactly as described in
https://en.wikipedia.org/wiki/MurmurHash#Algorithm and the double
hashing technique using seed values 0x293ae76f and 0x7e646e2 as
described in https://doi.org/10.1007/978-3-540-30494-4_26 "Bloom Filters
- in Probabilistic Verification"
+ in Probabilistic Verification". Version 1 bloom filters have a bug that appears
+ when int is signed and the repository has path names that have characters >=
+ 0x80; Git supports reading and writing them, but this ability will be removed
+ in a future version of Git.
- The number of times a path is hashed and hence the number of bit positions
that cumulatively determine whether a file is present in the commit.
- The minimum number of bits 'b' per entry in the Bloom filter. If the filter
--
2.41.0.162.gfafddb0af9-goog
