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-rw-r--r--Documentation/git-status.txt13
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diff --git a/Documentation/git-status.txt b/Documentation/git-status.txt
index d47f198f15..23af8c6dc9 100644
--- a/Documentation/git-status.txt
+++ b/Documentation/git-status.txt
@@ -366,6 +366,19 @@ ignored submodules you can either use the --ignore-submodules=dirty command
line option or the 'git submodule summary' command, which shows a similar
output but does not honor these settings.
+BACKGROUND REFRESH
+------------------
+
+By default, `git status` will automatically refresh the index, updating
+the cached stat information from the working tree and writing out the
+result. Writing out the updated index is an optimization that isn't
+strictly necessary (`status` computes the values for itself, but writing
+them out is just to save subsequent programs from repeating our
+computation). When `status` is run in the background, the lock held
+during the write may conflict with other simultaneous processes, causing
+them to fail. Scripts running `status` in the background should consider
+using `git --no-optional-locks status` (see linkgit:git[1] for details).
+
SEE ALSO
--------
linkgit:gitignore[5]