• Dave Chinner's avatar
    xfs: remove all the inodes on a buffer from the AIL in bulk · 30136832
    Dave Chinner authored
    When inode buffer IO completes, usually all of the inodes are removed from the
    AIL. This involves processing them one at a time and taking the AIL lock once
    for every inode. When all CPUs are processing inode IO completions, this causes
    excessive amount sof contention on the AIL lock.
    
    Instead, change the way we process inode IO completion in the buffer
    IO done callback. Allow the inode IO done callback to walk the list
    of IO done callbacks and pull all the inodes off the buffer in one
    go and then process them as a batch.
    
    Once all the inodes for removal are collected, take the AIL lock
    once and do a bulk removal operation to minimise traffic on the AIL
    lock.
    Signed-off-by: default avatarDave Chinner <dchinner@redhat.com>
    Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
    30136832
xfs_inode_item.c 29.5 KB