linux-ext4 - Maximum number of directories

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <17001225.1MS6YREEfJ@deuteros>
Date:	Mon, 04 Feb 2013 10:55:54 +0000
From:	Tvrtko Ursulin <tvrtko.ursulin@...lan.co.uk>
To:	linux-ext4@...r.kernel.org
Subject: Maximum number of directories

Hi all,

What is the maximum number of directories ext4 can hold in a tree layout with 
a depth of ~160 and each directory node having then a couple to couple dozen 
subdirectories?

I was creating such a (crazy?) tree and hit -ENOSPC at ~31 million directories 
created in total with df showing only 40% use:

Filesystem                 1K-blocks       Used  Available Use% Mounted on
/dev/mapper/data           477277612K 177766152K 275621952K  40% /data

Some lines from tune2fs made me think it should hold more, but obviously I was 
mistaken? Or it is a bug?

Inode count:              29868032
Free inodes:              29848131

Regards,

Tvrtko

--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html