• Dave Chinner's avatar
    Merge tag 'rmap-speedups-5.19_2022-04-28' of... · 956f1b8f
    Dave Chinner authored
    Merge tag 'rmap-speedups-5.19_2022-04-28' of git://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-5.19-for-next
    
    xfs: fix rmap inefficiencies
    
    Reduce the performance impact of the reverse mapping btree when
    reflink is enabled by using the much faster non-overlapped btree
    lookup functions when we're searching the rmap index with a fully
    specified key.  If we find the exact record we're looking for,
    great!  We don't have to perform the full overlapped scan.  For
    filesystems with high sharing factors this reduces the xfs_scrub
    runtime by a good 15%%.
    
    This has been shown to reduce the fstests runtime for realtime rmap
    configurations by 30%%, since the lack of AGs severely limits
    scalability.
    Signed-off-by: default avatarDave Chinner <david@fromorbit.com>
    956f1b8f
xfs_trace.h 128 KB