Import all Kt's Fast Charge Commits up to Aug 8th
SELinux: Fix memory leak upon loading policy
mm: Fix calculation of dirtyable memory
Async I/O latency to a ssd greatly increased, 34% gain (Creds: kleikamp)
ext4: speed up truncate/unlink by not using bforget() unless needed
writeback: fix race that cause writeback hung
sync: don't block the flusher thread waiting on IO
writeback: Fix occasional slow sync(1)
writeback: fix writeback cache thrashing
jbd2: optimize jbd2_journal_force_commit
cpufreq: Memory leak with sysfs when stats table are freed
lib/int_sqrt.c: optimize square root algorithm
lib/string: use glibc version
lib/memcopy: use glibc version
lowmemorykiller: swap optimization