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    SubjectRe: [PATCH 1/5] inode: Make unused inode LRU per superblock
    On Tue, May 25, 2010 at 06:53:04PM +1000, Dave Chinner wrote:
    > From: Dave Chinner <dchinner@redhat.com>
    >
    > The inode unused list is currently a global LRU. This does not match
    > the other global filesystem cache - the dentry cache - which uses
    > per-superblock LRU lists. Hence we have related filesystem object
    > types using different LRU reclaimatin schemes.

    Is this an improvement I wonder? The dcache is using per sb lists
    because it specifically requires sb traversal.

    What allocation/reclaim really wants (for good scalability and NUMA
    characteristics) is per-zone lists for these things. It's easy to
    convert a single list into per-zone lists.

    It is much harder to convert per-sb lists into per-sb x per-zone lists.



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