On 01.10.24 14:18, Matthew Wilcox wrote: > On Tue, Oct 01, 2024 at 01:29:09PM +0200, Linux regression tracking (Thorsten Leemhuis) wrote: >>> DIR* dir = opendir("/tmp/dirent-problems-test-dir"); >>> >>> fd = creat("/tmp/dirent-problems-test-dir/after", 0644); > > "If a file is removed from or added to the directory after the most > recent call to opendir() or rewinddir(), whether a subsequent call to > readdir() returns an entry for that file is unspecified." > > https://pubs.opengroup.org/onlinepubs/007904975/functions/readdir.html > > That said, if there's an easy fix here, it'd be a nice improvement to > QoI to do it, but the test-case as written is incorrect. Many thx Willy! Which leads to a question: Krzysztof, how did you find the problem? Was there a practical use case (some software or workload) with this behavior that broke and made your write that test-case? Or is that a test-program older and part of your CI tests or something like that? Ciao, Thorsten