Hi
Been on my todo list to implement ionice support for tracker for a
while, since it's such a simple thing to do. But I'm having some
problems building the current version.
First when building I'm missing the directories thumbnailers/image and
src/tracker-gui.
And when taking that out I get the error:
aclocal: macro `AM_PROG_MKDIR_P' required but not defined
aclocal: macro `AM_PROG_MKDIR_P' required but not defined
in the libextractor directory.
Attaching a theoretically working implementation of ionice. trackerd.c
would have to run the ionice_init() function. I would have tested it
and made it a bit cleaner if I could get the cvs version compiled at all :P
Most of the code for ionice is gotten from the snippet in the
Documentation/block/ioprio.txt file in the linux kernel.
Anders Aagaard
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <getopt.h>
#include <unistd.h>
#include <sys/ptrace.h>
#include <asm/unistd.h>
extern int sys_ioprio_set(int, int, int);
extern int sys_ioprio_get(int, int);
#if defined(__i386__)
#define __NR_ioprio_set 289
#define __NR_ioprio_get 290
#elif defined(__ppc__)
#define __NR_ioprio_set 273
#define __NR_ioprio_get 274
#elif defined(__x86_64__)
#define __NR_ioprio_set 251
#define __NR_ioprio_get 252
#elif defined(__ia64__)
#define __NR_ioprio_set 1274
#define __NR_ioprio_get 1275
#else
#define NO_IOPRIO
#endif
#ifndef NO_IOPRIO
_syscall3(int, ioprio_set, int, which, int, who, int, ioprio);
_syscall2(int, ioprio_get, int, which, int, who);
enum {
IOPRIO_CLASS_NONE,
IOPRIO_CLASS_RT,
IOPRIO_CLASS_BE,
IOPRIO_CLASS_IDLE,
};
enum {
IOPRIO_WHO_PROCESS = 1,
IOPRIO_WHO_PGRP,
IOPRIO_WHO_USER,
};
#endif
void ionice_init()
{
#ifndef NO_IOPRIO
int ioprio = 7, ioprio_class = IOPRIO_CLASS_BE;
// Setting us to best effort, priority 7. Could also consider IOPRIO_CLASS_IDLE.
if (ioprio_set(IOPRIO_WHO_PROCESS, 0, ioprio | ioprio_class << IOPRIO_CLASS_SHIFT) == -1) {
tracker_log("ioprio_set error.");
return 1;
}
#endif
}
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