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xfs: use per-filesystem I/O completion workqueues

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The new concurrency managed workqueues are cheap enough that we can create
per-filesystem instead of global workqueues.  This allows us to remove the
trylock or defer scheme on the ilock, which is not helpful once we have
outstanding log reservations until finishing a size update.

Also allow the default concurrency on this workqueues so that I/O completions
blocking on the ilock for one inode do not block process for another inode.

Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Christoph Hellwig
2012-02-29 09:53:48 +00:00
committed by Ben Myers
parent 4b217ed9e3
commit aa6bf01d39
5 changed files with 51 additions and 49 deletions
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3
fs/xfs/xfs_mount.h
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@@ -211,6 +211,9 @@ typedef struct xfs_mount {
struct shrinker m_inode_shrink; /* inode reclaim shrinker */
int64_t m_low_space[XFS_LOWSP_MAX];
/* low free space thresholds */
struct workqueue_struct *m_data_workqueue;
struct workqueue_struct *m_unwritten_workqueue;
} xfs_mount_t;
/*