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| author | Junio C Hamano <gitster@pobox.com> | 2015-07-14 00:00:26 +0300 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2015-07-14 00:00:26 +0300 |
| commit | 43f23b09bffed2ab8852725e26f746d1f762cc85 (patch) | |
| tree | 0de5057d26f8c47b326869f698856a4ac42adeeb /Documentation/technical | |
| parent | e01787f1a1de589b7adc6f6946b53996a5e74c34 (diff) | |
| parent | b1ffafa978b99ed65b3c040ae762bfdec2379cfc (diff) | |
Merge branch 'kb/use-nsec-doc'
Clarify in the Makefile a guideline to decide use of USE_NSEC.
* kb/use-nsec-doc:
Makefile / racy-git.txt: clarify USE_NSEC prerequisites
Diffstat (limited to 'Documentation/technical')
| -rw-r--r-- | Documentation/technical/racy-git.txt | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/Documentation/technical/racy-git.txt b/Documentation/technical/racy-git.txt index 242a044db9..4a8be4d144 100644 --- a/Documentation/technical/racy-git.txt +++ b/Documentation/technical/racy-git.txt @@ -41,13 +41,17 @@ With a `USE_STDEV` compile-time option, `st_dev` is also compared, but this is not enabled by default because this member is not stable on network filesystems. With `USE_NSEC` compile-time option, `st_mtim.tv_nsec` and `st_ctim.tv_nsec` -members are also compared, but this is not enabled by default +members are also compared. On Linux, this is not enabled by default because in-core timestamps can have finer granularity than on-disk timestamps, resulting in meaningless changes when an inode is evicted from the inode cache. See commit 8ce13b0 of git://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git ([PATCH] Sync in core time granularity with filesystems, -2005-01-04). +2005-01-04). This patch is included in kernel 2.6.11 and newer, but +only fixes the issue for file systems with exactly 1 ns or 1 s +resolution. Other file systems are still broken in current Linux +kernels (e.g. CEPH, CIFS, NTFS, UDF), see +https://lkml.org/lkml/2015/6/9/714 Racy Git -------- |