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thoughts

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Joey Hess 2012-06-06 15:13:18 -04:00
parent 899334223f
commit 81d4991fa3
1 changed files with 12 additions and 4 deletions
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doc/design/assistant/inotify.mdwn
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@ -67,10 +67,18 @@ Many races need to be dealt with by this code. Here are some of them.
**Currently unfixed**; This changes content in the annex, and fsck will **Currently unfixed**; This changes content in the annex, and fsck will
later catch the inconsistency. later catch the inconsistency.
Possible fixes: Somehow track or detect if a file is open for write Possible fixes:
by any processes. Or, when possible, making a copy on write copy
before adding the file would avoid this. Or, as a last resort, make * Somehow track or detect if a file is open for write by any processes.
an expensive copy of the file and add that. * Or, when possible, making a copy on write copy before adding the file
would avoid this.
* Or, as a last resort, make an expensive copy of the file and add that.
* Tracking file opens and closes with inotify could tell if any other
processes have the file open. But there are problems.. It doesn't
seem to differentiate between files opened for read and for write.
And there would still be a race after the last close and before it's
injected into the annex, where it could be opened for write again.
Would need to detect that and undo the annex injection or something.
* File is added and then replaced with another file before the annex add * File is added and then replaced with another file before the annex add
makes its symlink. makes its symlink.