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xfs: reimplement fdatasync support

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Add an in-memory only flag to say we logged timestamps only, and use it to
check if fdatasync can optimize away the log force.

Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Christoph Hellwig 2012-02-29 09:53:55 +00:00 • committed by Ben Myers
parent f5d8d5c4bf
commit 8f639ddea0
4 changed files with 18 additions and 5 deletions
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3
fs/xfs/xfs_inode_item.c
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@ -438,7 +438,8 @@ out:
* games in recovery easier, which isn't a big deal as just about any
* transaction would dirty it anyway.
*/
iip->ili_format.ilf_fields = XFS_ILOG_CORE | iip->ili_fields;
iip->ili_format.ilf_fields = XFS_ILOG_CORE |
(iip->ili_fields & ~XFS_ILOG_TIMESTAMP);
iip->ili_format.ilf_size = nvecs;
}