From: Sander <sander@humilis.net>
To: Josef Bacik <josef@redhat.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: [PATCH 0/3] Btrfs: save free space cache to the disk
Date: Mon, 20 Sep 2010 13:24:46 +0200 [thread overview]
Message-ID: <20100920112446.GA10866@attic.humilis.net> (raw)
In-Reply-To: <1284577734-3161-1-git-send-email-josef@redhat.com>
Josef Bacik wrote (ao):
> This patch series introduces the ability for btrfs to store the free space cache
> ondisk to make the caching of a block group much quicker. Previously we had to
> search the entire extent-tree to look for gaps everytime we wanted to allocate
> in a block group. This approach instead dumps all of the free space cache to
> disk for every dirtied block group each time we commit the transaction. This is
> a disk format change, but in order to use the feature you will have to mount
> with -o space_cache, and then from then on you won't be able to use old kernels
> with your filesystem.
Will this go into a future version of btrfs?
If so, would it make sense to include other changes that would require a
format change?
Sander
--
Humilis IT Services and Solutions
http://www.humilis.net
prev parent reply other threads:[~2010-09-20 11:24 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-15 19:08 [PATCH 0/3] Btrfs: save free space cache to the disk Josef Bacik
2010-09-15 19:08 ` [PATCH 1/3] Btrfs: create special free space cache inode FORMAT CHANGE Josef Bacik
2010-09-15 19:08 ` [PATCH 2/3] Btrfs: write out free space cache Josef Bacik
2010-09-15 19:08 ` [PATCH 3/3] Btrfs: load free space cache if it exists Josef Bacik
2010-09-20 11:24 ` Sander [this message]
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