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authorTheodore Ts'o <tytso@mit.edu>2013-02-09 16:28:20 -0500
committerTheodore Ts'o <tytso@mit.edu>2013-02-09 16:28:20 -0500
commita0b30c12297eb63e9b994164f9c0937d29b9352d (patch)
tree5d72a1352fba8bda1f61ae38ae2857545e982cc0 /fs/jbd2
parent1139575a927010390c6b38e4215a6d741b056074 (diff)
downloadlinux-a0b30c12297eb63e9b994164f9c0937d29b9352d.tar.bz2
ext4: use module parameters instead of debugfs for mballoc_debug
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: "Theodore Ts'o" <tytso@mit.edu>
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