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The /proc/fs/ext4/<dev>/mb_history was maintained manually, and had a number of problems: it required a largish amount of memory to be allocated for each ext4 filesystem, and the s_mb_history_lock introduced a CPU contention problem. By ripping out the mb_history code and replacing it with ftrace tracepoints, and we get more functionality: timestamps, event filtering, the ability to correlate mballoc history with other ext4 tracepoints, etc. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> |
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block.h | ||
ext4.h | ||
irq.h | ||
jbd2.h | ||
kmem.h | ||
kvm.h | ||
lockdep.h | ||
module.h | ||
napi.h | ||
power.h | ||
sched.h | ||
skb.h | ||
syscalls.h | ||
timer.h | ||
workqueue.h |