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    ext4: Use readahead when reading an inode from the inode table · 240799cd
    Theodore Ts'o 提交于
    With modern hard drives, reading 64k takes roughly the same time as
    reading a 4k block.  So request readahead for adjacent inode table
    blocks to reduce the time it takes when iterating over directories
    (especially when doing this in htree sort order) in a cold cache case.
    With this patch, the time it takes to run "git status" on a kernel
    tree after flushing the caches via "echo 3 > /proc/sys/vm/drop_caches"
    is reduced by 21%.
    Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
    240799cd
ext4_sb.h 4.7 KB