linux-kernel - Re: Horrible btrfs performance due to fragmentation

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:	Mon, 1 Nov 2010 12:09:43 -0400
From:	Gregory Maxwell <gmaxwell@...il.com>
To:	Felipe Contreras <felipe.contreras@...il.com>
Cc:	Hugo Mills <hugo-lkml@...fax.org.uk>, cwillu <cwillu@...llu.com>,
	Calvin Walton <calvin.walton@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-btrfs@...r.kernel.org, Chris Mason <chris.mason@...cle.com>
Subject: Re: Horrible btrfs performance due to fragmentation

On Mon, Nov 1, 2010 at 11:58 AM, Felipe Contreras
<felipe.contreras@...il.com> wrote:
> Or when going through all the fragments of a file, have a counter, and
> if it exceeds certain limit mark it somehow, so that it gets
> defragmented at least to a certain extent.

Thats elegant, — then resources are only spent on defragmenting files
which are actually in use and which actually need it... but I don't
see how it deals with the partial mutual exclusivity of defragmenting
and COWed files.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/