linux-ext4 - Re: how to scale root-reserved space going forward...

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] [day] [month] [year] [list]

Message-ID: <49AC08AD.7050602@redhat.com>
Date:	Mon, 02 Mar 2009 10:26:21 -0600
From:	Eric Sandeen <sandeen@...hat.com>
To:	Andreas Dilger <adilger@....com>
CC:	Theodore Tso <tytso@....edu>,
	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: how to scale root-reserved space going forward...

Andreas Dilger wrote:

> I suspect that at a certain filesystem size, there isn't much benefit
> in having more reserved space.  If we keep 50GB of reserved space then
> this is likely to contain a decent amount of 1MB free chunks, which is
> what we really care about.
> 
> Cheers, Andreas

As long as we don't care much about inode<->block locality, that is
probably ok...

I got one off-list reply from someone who was depending on the 5% for
administration reasons, but even if we change the default I assume we'll
leave the tunable in place for people who really do want 5% for
"root-reserved" over "allocator safety buffer" reasons.

-Eric

--
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