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lmkd: mlock all memory 

Use mlockall(MCL_FUTURE) to lock all lmkd pages in memory.  This
avoids lmkd thrashing when the system is low on memory.

As a side effect, it will also keep the .text sections of liblog, libm,
libc, and libprocessgroup in memory at all times.

Bug: 16236289
Change-Id: Idd70557efa4b1e14bc86f14220672a30f6c956e3
This commit is contained in:
Colin Cross 2014-07-11 17:15:44 -07:00
parent fbde2c9830
commit c405900f87
1 changed files with 2 additions and 0 deletions
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lmkd.c
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@ -26,6 +26,7 @@
#include <sys/cdefs.h> #include <sys/cdefs.h>
#include <sys/epoll.h> #include <sys/epoll.h>
#include <sys/eventfd.h> #include <sys/eventfd.h>
#include <sys/mman.h>
#include <sys/socket.h> #include <sys/socket.h>
#include <sys/types.h> #include <sys/types.h>
#include <unistd.h> #include <unistd.h>
@ -747,6 +748,7 @@ static void mainloop(void) {
} }
int main(int argc __unused, char **argv __unused) { int main(int argc __unused, char **argv __unused) {
mlockall(MCL_FUTURE);
if (!init()) if (!init())
mainloop(); mainloop();