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racy-git.txt: explain nsec problem in more detail

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Idealists may want USE_NSEC to be the default on Linux some day.
Point to a patch to better explain the requirements on
filesystem code for that to happen.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jonathan Nieder 2009-10-09 05:25:54 -05:00 committed by Junio C Hamano
parent 580cbb58a2
commit 989c530e7f
1 changed files with 6 additions and 4 deletions
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10
Documentation/technical/racy-git.txt
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@ -42,10 +42,12 @@ 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
because the value of this member becomes meaningless once the
inode is evicted from the inode cache on filesystems that do not
store it on disk.
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 granuality with filesystems,
2005-01-04).
Racy git
--------