Messages in this thread | | | Subject | Re: [Question] Mlocked count will not be decreased | From | Tetsuo Handa <> | Date | Wed, 24 May 2017 07:04:53 +0900 |
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Kefeng Wang wrote: > Hi All, > > Mlocked in meminfo will be increasing with an small testcase, and never be released in mainline, > here is a testcase[1] to reproduce the issue, but the centos7.2/7.3 will not increase. > > Is it normal?
I confirmed your problem also occurs in Linux 4.11 using below testcase. MemFree is not decreasing while Mlocked is increasing. Thus, it seems to be statistics accounting bug.
---------- #include <sys/mman.h> #include <stdlib.h> #include <unistd.h>
int main(int argc, char ** argv) { int i; for (i = 0; i < 128; i++) if (fork() == 0) { malloc(1048576); while (1) { mlockall(MCL_CURRENT | MCL_FUTURE); munlockall(); } } return 0; } ----------
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