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]
Date:	Fri, 11 Jan 2008 15:04:08 +0100
From:	Valerie Clement <>
To:	ext4 development <>
Subject: Problems with mballoc and uninit_groups option


I've got problems with mballoc when I create the ext4 filesystem with 
the "uninit_groups" option enabled.

First, I do a single test on a filesystem created without the 
"uninit_groups" option and mounted with the defaults option:
   dd if=/dev/zero of=/mnt/test/foo bs=1M count=1024

In this case, the file blocks are allocated in the groups 4, 5, 6, 7, 8, 
9, 10.

When the filesystem is created with the "uninit_groups" option enabled 
and mounted with the defaults option, I do the same dd command.

In this case, the file blocks are allocated in the groups 5, 7, 9, 25, 
27, 49, 81. It seems that the blocks could be allocated only in the 
already initialized groups.

Who knows how to fix that?

To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists