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| author | Bill Kendall <wkendall@sgi.com> | 2011-11-07 14:58:30 -0600 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2011-11-10 10:55:32 +0000 |
| commit | 54dc99f6f6c3f3c53baa4ab3da82e1ae75219389 (patch) | |
| tree | c9a2cdc6f3264ec0738b02902e82464f285295f4 | |
| parent | e68fa1417b6538611d222bfcddaedb8ef74e5a72 (diff) | |
| download | xfsdump-dev-54dc99f6f6c3f3c53baa4ab3da82e1ae75219389.tar.gz | |
xfsdump: path lookup cache must be thread specific
The xfsrestore path lookup routine (maps an ino + generation number to a
pathname) contains a cache for fast lookups of consecutive files in the
same parent directory. This cache either needs to be protected by a lock
or a cache is needed per thread. I took the latter approach since it
doesn't add lock contention and it increases the cache hit rate (it's
relatively unlikely that each stream is processing files in the same
directory).
Signed-off-by: Bill Kendall <wkendall@sgi.com>
Reviewed-by: Alex Elder <aelder@sgi.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
| -rw-r--r-- | restore/tree.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/restore/tree.c b/restore/tree.c index 7bddddf8..9e4e83ce 100644 --- a/restore/tree.c +++ b/restore/tree.c @@ -3441,7 +3441,7 @@ Node2path( nh_t nh, char *path, char *errmsg ) static intgen_t Node2path_recurse( nh_t nh, char *buf, intgen_t bufsz, intgen_t level ) { - static path_cache_t cache = { NH_NULL, 0, "" }; + static __thread path_cache_t cache = { NH_NULL, 0, "" }; node_t *np; nh_t parh; xfs_ino_t ino; |