From: Theodore Tso <tytso@mit.edu>
To: Avi Kivity <avi@argo.co.il>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [RFC] [PATCH 5/8] inode-diet: Eliminate i_blksize and use a per-superblock default
Date: Mon, 19 Jun 2006 12:55:22 -0400 [thread overview]
Message-ID: <20060619165522.GA15216@thunk.org> (raw)
In-Reply-To: <4496C782.8090605@argo.co.il>
On Mon, Jun 19, 2006 at 06:49:22PM +0300, Avi Kivity wrote:
>
> Isn't this a behavioral change? If a filesystem chooses to provide
> i_blksize via a getattr method, it will not show on nfs mounts.
There's actually a philosophical question hiding here over what's the
right thing to do with how st_blksize should be handled over NFS ---
st_blksize is supposed to be the "optimum I/O size"; the question is
what is the right answer that we report in both directions. For
example, it doesn't matter if we're exporting a Ultra Fast whiz-bang
cluster filesystem with a stripsize of 100 gigabytes. If wsize is
1024, it might be that we shouldn't be sending back an st_blksize
that's really big.
So I'm not pretending that what we have in the patch is the right
thing, only that I'm not entirely sure we were ever doing the right
thing here.
- Ted
next prev parent reply other threads:[~2006-06-19 16:55 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-19 15:20 [RFC] [PATCH 0/8] Inode slimming Theodore Tso
2006-06-19 15:20 ` [RFC] [PATCH 1/8] inode_diet: Replace inode.u.generic_ip with inode.i_private Theodore Tso
2006-06-19 17:17 ` Jan Engelhardt
2006-06-19 19:09 ` Christoph Hellwig
2006-06-19 19:37 ` Theodore Tso
2006-06-20 9:43 ` Steven Whitehouse
2006-06-20 11:45 ` Arnd Bergmann
2006-06-20 12:34 ` Steven Whitehouse
2006-06-20 13:53 ` Arnd Bergmann
2006-06-20 15:01 ` Brian F. G. Bidulock
2006-06-20 15:04 ` Brian F. G. Bidulock
2006-06-20 12:29 ` Theodore Tso
2006-06-19 15:20 ` [RFC] [PATCH 2/8] inode-diet: Move i_pipe into a union Theodore Tso
2006-06-19 17:19 ` Jan Engelhardt
2006-06-19 19:06 ` Theodore Tso
2006-06-20 15:23 ` Brian F. G. Bidulock
2006-06-21 1:45 ` Theodore Tso
2006-06-22 9:03 ` Brian F. G. Bidulock
2006-06-19 15:20 ` [RFC] [PATCH 3/8] inode-diet: Move i_bdev " Theodore Tso
2006-06-19 15:20 ` [RFC] [PATCH 4/8] inode-diet: Move i_cdev " Theodore Tso
2006-06-19 17:20 ` Jan Engelhardt
2006-06-19 15:20 ` [RFC] [PATCH 5/8] inode-diet: Eliminate i_blksize and use a per-superblock default Theodore Tso
2006-06-19 15:49 ` Avi Kivity
2006-06-19 16:55 ` Theodore Tso [this message]
2006-06-19 15:58 ` Christoph Hellwig
2006-06-19 16:16 ` Joel Becker
2006-06-19 17:20 ` Theodore Tso
2006-06-19 18:55 ` Christoph Hellwig
2006-06-19 22:13 ` Mark Fasheh
2006-06-21 19:41 ` Nate Diller
2006-06-19 17:03 ` Theodore Tso
2006-06-19 18:56 ` Christoph Hellwig
2006-06-19 16:01 ` Joel Becker
2006-06-19 17:06 ` Theodore Tso
2006-06-19 21:45 ` Joel Becker
2006-06-19 22:14 ` Mark Fasheh
2006-06-19 15:20 ` [RFC] [PATCH 6/8] inode-diet: Move i_cindex from struct inode to struct file Theodore Tso
2006-06-19 19:33 ` Al Viro
2006-06-19 19:37 ` Al Viro
2006-06-19 20:58 ` Theodore Tso
2006-06-19 21:51 ` Stefan Richter
2006-06-19 15:20 ` [RFC] [PATCH 7/8] inode-diet: Use a union for i_blocks and i_size, i_rdev and i_devices Theodore Tso
2006-06-19 15:20 ` [RFC] [PATCH 8/8] inode-diet: Fix size of i_blkbits, i_version, and i_dnotify_mask Theodore Tso
2006-06-19 16:54 ` [RFC] [PATCH 0/8] Inode slimming Christoph Lameter
2006-06-19 19:09 ` Theodore Tso
-- strict thread matches above, loose matches on Subject: below --
2006-06-21 12:51 [RFC] [PATCH 0/8] Inode diet v2 Theodore Tso
2006-06-21 12:51 ` [RFC] [PATCH 5/8] inode-diet: Eliminate i_blksize and use a per-superblock default Theodore Tso
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