From: "J. Bruce Fields" <bfields@fieldses.org>
To: Jeff Layton <jlayton@kernel.org>
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org,
neilb@suse.de, jack@suse.de, linux-ext4@vger.kernel.org,
tytso@mit.edu, adilger.kernel@dilger.ca,
linux-xfs@vger.kernel.org, darrick.wong@oracle.com,
david@fromorbit.com, linux-btrfs@vger.kernel.org, clm@fb.com,
jbacik@fb.com, dsterba@suse.com, linux-integrity@vger.kernel.org,
zohar@linux.vnet.ibm.com, dmitry.kasatkin@gmail.com,
linux-afs@lists.infradead.org, dhowells@redhat.com,
jaltman@auristor.com, krzk@kernel.org
Subject: Re: [PATCH v5 02/19] fs: don't take the i_lock in inode_inc_iversion
Date: Fri, 19 Jan 2018 09:43:51 -0500 [thread overview]
Message-ID: <20180119144351.GA11735@fieldses.org> (raw)
In-Reply-To: <1516372594.3588.11.camel@kernel.org>
On Fri, Jan 19, 2018 at 09:36:34AM -0500, Jeff Layton wrote:
> Shrug...we have that problem with the spinlock in place too. The bottom
> line is that reads of this value are not serialized with the increment
> at all.
OK, so this wouldn't even be a new bug.
> I'm not 100% thrilled with this patch, but I think it's probably better
> not to add the i_lock all over the place, even as an interim step in
> cleaning this stuff up.
Makes sense to me.
I've got no comments on the rest of the series, except that I'm all for
it.
Thanks for persisting--it turned out to be more involved than I'd
imagined!
--b.
next prev parent reply other threads:[~2018-01-19 14:43 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-09 14:10 [PATCH v5 00/19] fs: rework and optimize i_version handling in filesystems Jeff Layton
2018-01-09 14:10 ` [PATCH v5 01/19] fs: new API for handling inode->i_version Jeff Layton
2018-01-18 21:38 ` J. Bruce Fields
2018-01-18 22:47 ` Jeff Layton
2018-01-09 14:10 ` [PATCH v5 02/19] fs: don't take the i_lock in inode_inc_iversion Jeff Layton
2018-01-09 15:14 ` Jan Kara
2018-01-18 21:45 ` J. Bruce Fields
2018-01-19 14:36 ` Jeff Layton
2018-01-19 14:43 ` J. Bruce Fields [this message]
2018-01-09 14:10 ` [PATCH v5 03/19] fat: convert to new i_version API Jeff Layton
2018-01-09 14:10 ` [PATCH v5 04/19] affs: " Jeff Layton
2018-01-09 14:10 ` [PATCH v5 05/19] afs: " Jeff Layton
2018-01-09 14:10 ` [PATCH v5 06/19] btrfs: " Jeff Layton
2018-01-09 14:10 ` [PATCH v5 07/19] exofs: switch " Jeff Layton
2018-01-09 14:10 ` [PATCH v5 08/19] ext2: convert " Jeff Layton
2018-01-09 14:10 ` [PATCH v5 09/19] ext4: " Jeff Layton
2018-01-09 14:10 ` [PATCH v5 10/19] nfs: " Jeff Layton
2018-01-09 14:10 ` [PATCH v5 11/19] nfsd: " Jeff Layton
2018-01-09 14:10 ` [PATCH v5 12/19] ocfs2: " Jeff Layton
2018-01-09 14:10 ` [PATCH v5 13/19] ufs: use " Jeff Layton
2018-01-09 14:10 ` [PATCH v5 14/19] xfs: convert to " Jeff Layton
2018-01-09 22:46 ` Dave Chinner
2018-01-09 14:10 ` [PATCH v5 15/19] IMA: switch IMA over " Jeff Layton
2018-01-09 14:10 ` [PATCH v5 16/19] fs: only set S_VERSION when updating times if necessary Jeff Layton
2018-01-09 14:10 ` [PATCH v5 17/19] xfs: avoid setting XFS_ILOG_CORE if i_version doesn't need incrementing Jeff Layton
2018-01-09 22:48 ` Dave Chinner
2018-01-09 14:10 ` [PATCH v5 18/19] btrfs: only dirty the inode in btrfs_update_time if something was changed Jeff Layton
2018-01-11 19:30 ` Liu Bo
2018-01-09 14:10 ` [PATCH v5 19/19] fs: handle inode->i_version more efficiently Jeff Layton
2018-01-09 22:55 ` Dave Chinner
2018-01-10 14:12 ` Krzysztof Kozlowski
2018-01-11 20:23 ` [PATCH v5 00/19] fs: rework and optimize i_version handling in filesystems Liu Bo
2018-01-12 11:49 ` Jeff Layton
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