From: Eric Paris <eparis@redhat.com>
To: John Stoffel <john@stoffel.org>
Cc: linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org,
linux-fsdevel@vger.kernel.org, hch@infradead.org,
zohar@us.ibm.com, warthog9@kernel.org, david@fromorbit.com,
jmorris@namei.org, kyle@mcmartin.ca, hpa@zytor.com,
akpm@linux-foundation.org, torvalds@linux-foundation.org,
mingo@elte.hu, viro@zeniv.linux.org.uk
Subject: Re: [PATCH 01/11] IMA: use rbtree instead of radix tree for inode information cache
Date: Mon, 25 Oct 2010 17:34:43 -0400 [thread overview]
Message-ID: <1288042483.2655.16.camel@localhost.localdomain> (raw)
In-Reply-To: <19653.55494.240658.165153@quad.stoffel.home>
On Mon, 2010-10-25 at 15:21 -0400, John Stoffel wrote:
> >>>>> "Eric" == Eric Paris <eparis@redhat.com> writes:
> Which seems to fly in the face of your claim that it needs to be able
> to re-enable itself by tracking open inodes even when disabled.
You're confusing multiple completely unrelated things. Your confusing
loading an IMA measurement policy vs IMA indicating that it's
measurements may be unreliable.
> As the number of inodes goes up (say during a backup which reads
> them...) won't the size of this cache go up as well, even when IMA is
> disabled? Why is this overhead even needed?
At the end of this patch the number of integrity structures still has a
1-1 mapping with the number of inodes. If you look at the entire series
you will see that is not the case.
This patch by itself will cut the memory usage per inode by almost 600
bytes.
next prev parent reply other threads:[~2010-10-25 21:34 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-25 18:41 [PATCH 01/11] IMA: use rbtree instead of radix tree for inode information cache Eric Paris
2010-10-25 18:41 ` [PATCH 02/11] IMA: drop the inode opencount since it isn't needed for operation Eric Paris
2010-10-25 18:41 ` [PATCH 03/11] IMA: use unsigned int instead of long for counters Eric Paris
2010-10-25 18:41 ` [PATCH 04/11] IMA: convert internal flags from long to char Eric Paris
2010-10-25 18:41 ` [PATCH 05/11] IMA: use inode->i_lock to protect read and write counters Eric Paris
2010-10-25 18:41 ` [PATCH 06/11] IMA: use i_writecount rather than a private counter Eric Paris
2010-10-25 19:27 ` John Stoffel
2010-10-25 21:52 ` Eric Paris
2010-10-25 22:25 ` H. Peter Anvin
2010-10-25 22:29 ` Eric Paris
2010-10-26 13:57 ` John Stoffel
2010-10-26 13:53 ` John Stoffel
2010-10-26 22:08 ` H. Peter Anvin
2010-10-25 18:41 ` [PATCH 07/11] IMA: move read counter into struct inode Eric Paris
2010-10-25 18:42 ` [PATCH 08/11] IMA: only allocate iint when needed Eric Paris
2010-10-25 18:42 ` [PATCH 09/11] IMA: drop refcnt from ima_iint_cache since it isn't needed Eric Paris
2010-10-25 18:42 ` [PATCH 10/11] IMA: explicit IMA i_flag to remove global lock on inode_delete Eric Paris
2010-10-25 18:42 ` [PATCH 11/11] IMA: fix the ToMToU logic Eric Paris
2010-10-25 19:21 ` [PATCH 01/11] IMA: use rbtree instead of radix tree for inode information cache John Stoffel
2010-10-25 19:38 ` J.H.
2010-10-25 20:55 ` Linus Torvalds
2010-10-25 20:57 ` Christoph Hellwig
2010-10-25 21:11 ` Linus Torvalds
2010-10-26 14:01 ` John Stoffel
2010-10-26 15:22 ` Linus Torvalds
2010-10-26 15:30 ` Eric Paris
2010-10-26 15:53 ` John Stoffel
2010-10-26 18:13 ` Al Viro
2010-10-27 13:35 ` James Morris
2010-10-26 14:07 ` John Stoffel
2010-10-25 21:34 ` Eric Paris [this message]
2010-10-26 13:45 ` John Stoffel
2010-10-25 23:22 ` Dave Chinner
2010-10-26 0:12 ` Eric Paris
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