Linux system call using C programming. Write a system call that reports the foll

Question

Linux system call using C programming.

Write a system call that reports the following statistics about Linux page cache:

1. the current number of pages in the active list over all memory zones.

2. the current number of pages in the inactive list over all memory zones.

3. the current number of pages in the active list whose reference bit is set over all memory zones.

4. the current number of pages in the inactive list whose reference bit is set over all memory zones.

Write a user level program to test the system call.

Explanation / Answer

#include <stdio.h>

#include <linux/unistd.h>

#include <sys/syscall.h>

#define _memstats_ 327

int main(){

printf("Page size is: %i ", getpagesize());

syscall(_memstats_);

return 0;

}

USING cat /proc/meminfo we can get the answer for all the above questions.

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