path: root/Documentation/technical
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authorJunio C Hamano <>2017-11-21 05:07:50 (GMT)
committerJunio C Hamano <>2017-11-21 05:07:50 (GMT)
commite05336bddacb90cf243aacc0f7b7f34f900453d7 (patch)
treecb4a694c7de056ac7c4ec98e30b3b1c5b4cc3764 /Documentation/technical
parentf5da077b1f9e28a473f8219d8b8391450b794abf (diff)
parent614a718a797e04fb037b25371896f910e464b671 (diff)
Merge branch 'bp/fsmonitor'
We learned to talk to watchman to speed up "git status" and other operations that need to see which paths have been modified. * bp/fsmonitor: fsmonitor: preserve utf8 filenames in fsmonitor-watchman log fsmonitor: read entirety of watchman output fsmonitor: MINGW support for watchman integration fsmonitor: add a performance test fsmonitor: add a sample integration script for Watchman fsmonitor: add test cases for fsmonitor extension split-index: disable the fsmonitor extension when running the split index test fsmonitor: add a test tool to dump the index extension update-index: add fsmonitor support to update-index ls-files: Add support in ls-files to display the fsmonitor valid bit fsmonitor: add documentation for the fsmonitor extension. fsmonitor: teach git to optionally utilize a file system monitor to speed up detecting new or changed files. update-index: add a new --force-write-index option preload-index: add override to enable testing preload-index bswap: add 64 bit endianness helper get_be64
Diffstat (limited to 'Documentation/technical')
1 files changed, 19 insertions, 0 deletions
diff --git a/Documentation/technical/index-format.txt b/Documentation/technical/index-format.txt
index ade0b0c..db35726 100644
--- a/Documentation/technical/index-format.txt
+++ b/Documentation/technical/index-format.txt
@@ -295,3 +295,22 @@ The remaining data of each directory block is grouped by type:
in the previous ewah bitmap.
- One NUL.
+== File System Monitor cache
+ The file system monitor cache tracks files for which the core.fsmonitor
+ hook has told us about changes. The signature for this extension is
+ { 'F', 'S', 'M', 'N' }.
+ The extension starts with
+ - 32-bit version number: the current supported version is 1.
+ - 64-bit time: the extension data reflects all changes through the given
+ time which is stored as the nanoseconds elapsed since midnight,
+ January 1, 1970.
+ - 32-bit bitmap size: the size of the CE_FSMONITOR_VALID bitmap.
+ - An ewah bitmap, the n-th bit indicates whether the n-th index entry