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    ext4: use module parameters instead of debugfs for mballoc_debug · a0b30c12
    Theodore Ts'o 提交于
    There are multiple reasons to move away from debugfs.  First of all,
    we are only using it for a single parameter, and it is much more
    complicated to set up (some 30 lines of code compared to 3), and one
    more thing that might fail while loading the ext4 module.
    
    Secondly, as a module paramter it can be specified as a boot option if
    ext4 is built into the kernel, or as a parameter when the module is
    loaded, and it can also be manipulated dynamically under
    /sys/module/ext4/parameters/mballoc_debug.  So it is more flexible.
    
    Ultimately we want to move away from using mb_debug() towards
    tracepoints, but for now this is still a useful simplification of the
    code base.
    Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
    a0b30c12
mballoc.h 5.4 KB