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Commit e853d37e authored by Michael Rosenfeld's avatar Michael Rosenfeld
Browse files

Add a system property to init that drops caches. 

*   Users can't call /proc/sys/vm/drop_caches otherwise.
*   Requires change with associated SELinux permissions.

Bug: 178647679
Test: flashed user build and dropped caches; no avc denials.
Test: flashed userdebug build and dropped caches w/o root.
Change-Id: Ibc91991509f0902d1c04c958fefc0966233f0b2e
parent 5338d0b2

rootdir/init.rc

+5 −0
Original line number Diff line number Diff line
@@ -1141,6 +1141,11 @@ on property:sys.boot_completed=1 
on property:sys.sysctl.extra_free_kbytes=*

    write /proc/sys/vm/extra_free_kbytes ${sys.sysctl.extra_free_kbytes}



# Allow users to drop caches

on property:perf.drop_caches=3

    write /proc/sys/vm/drop_caches 3

    setprop perf.drop_caches 0



# "tcp_default_init_rwnd" Is too long!

on property:net.tcp_def_init_rwnd=*

    write /proc/sys/net/ipv4/tcp_default_init_rwnd ${net.tcp_def_init_rwnd}