linux-ext4 - Re: Unused block group, but all blocks not free?

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

Date:	Wed, 20 May 2015 11:15:59 -0400
From:	Phil Susi <psusi@...ntu.com>
To:	Theodore Ts'o <tytso@....edu>
CC:	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: Unused block group, but all blocks not free?

On 5/20/2015 11:10 AM, Theodore Ts'o wrote:
> Have you checked to see if the metadata for other block groups are
> taking up space in the block group.  This can happen when using the
> flex_bg layout.  (And without flex_bg, then *all* block groups will
> always have blocks in use, for their own metadata blocks.)

That was my first thought and no, they aren't.  The metadata is in bg 0 
and bg 32, not 25.  Even still, when the metadata is there, shouldn't 
the allocation bitmap mark those blocks as in use rather than be 
uninitialized?

--
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