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| author |   Jingbo Xu <jefflexu@linux.alibaba.com> | 2023-07-22 17:45:38 +0800 |
|---|---|---|
| committer |   Gao Xiang <hsiangkao@linux.alibaba.com> | 2023-08-11 12:11:44 +0800 |
| commit | fd73a4395d477ae134f319f7368a9f8a6264fd8b (patch) | |
| tree | 1cac2d7b88971fa8513ac6454cbe0bc6770d5df7 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | erofs: update on-disk format for xattr name filter (diff) | |
| download | wireguard-linux-fd73a4395d477ae134f319f7368a9f8a6264fd8b.tar.xz wireguard-linux-fd73a4395d477ae134f319f7368a9f8a6264fd8b.zip | |
erofs: boost negative xattr lookup with bloom filter
Optimise the negative xattr lookup with bloom filter.
The bit value for the bloom filter map has a reverse semantics for
compatibility. That is, the bit value of 0 indicates existence, while
the bit value of 1 indicates the absence of corresponding xattr.
The initial version is _only_ enabled when xattr_filter_reserved is
zero. The filter map internals may change in the future, in which case
the reserved flag will be set non-zero and we don't need bothering the
compatible bits again at that time. For now disable the optimization if
this reserved flag is non-zero.
Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20230722094538.11754-3-jefflexu@linux.alibaba.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions