Messages in this thread | | | Date | Mon, 25 Oct 2004 14:47:18 +0200 (MEST) | From | Jan Engelhardt <> | Subject | Re: readdir loses renamed files |
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>So if I lose a file, how many times should I scan the directory again >to know if it's really gone? And is it really worth the extra overhead
Maybe the use of stat() will show whether a file really exists.
>The test program that I had showed that the next scan didn't >necessarily return it either. The file was sometimes lost for as long >as 5 scans.
Unrelated to this issue, I had a look into reiser3 for some other project of mine. What I've found was that upon renaming() a file, the old entry is marked invisble first, and then the new one is marked visible. You would need to meet a lot of conditions to have a file lost (IMO): - using reiser3 - reiserfs_rename() is suspended for as long as 5 scans (only happens either on SMP or UP+preempt) - reiserfs_rename() hangs... somwhat, because while(i<5){while(readdir(...)){}} usually takes longer than a rename
Jan Engelhardt -- Gesellschaft für Wissenschaftliche Datenverarbeitung Am Fassberg, 37077 Göttingen, www.gwdg.de - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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