All of lore.kernel.org
 help / color / mirror / Atom feed
From: Eric Sandeen <sandeen@redhat.com>
To: ext4 development <linux-ext4@vger.kernel.org>
Subject: how to scale root-reserved space going forward...
Date: Sun, 01 Mar 2009 16:22:54 -0600	[thread overview]
Message-ID: <49AB0ABE.1030009@redhat.com> (raw)

5% of a 16T filesystem is getting a little crazy from the point of view
of "root-reserved" - 800G!

But I think the original reason for this reserved space was actually as
an allocator cushion; letting root gain access to it was just a
safety-valve for that.

Now that we have a completely different allocator in ext4, and
potentially much larger filesystems, I think we need to revisit how much
is held back, and for what reason.

Any thoughts on a reasonable way to scale this reservation (or, just for
discussion - if it's even needed at all today for ext4?)

-Eric

             reply	other threads:[~2009-03-01 22:22 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-01 22:22 Eric Sandeen [this message]
2009-03-02  2:47 ` how to scale root-reserved space going forward Theodore Tso
2009-03-02  7:17   ` Ron Johnson
2009-03-02  8:56   ` Andreas Dilger
2009-03-02 16:26     ` Eric Sandeen

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=49AB0ABE.1030009@redhat.com \
    --to=sandeen@redhat.com \
    --cc=linux-ext4@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.