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/*
* Copyright (C) 2006, Intel Corporation
*
* This file is part of irqbalance
*
* This program file is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program in a file named COPYING; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
/*
* This file contains the code to communicate a selected distribution / mapping
* of interrupts to the kernel.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdint.h>
#include "irqbalance.h"
void activate_mapping(void)
{
struct interrupt *irq;
GList *iter;
iter = g_list_first(interrupts);
while (iter) {
irq = iter->data;
iter = g_list_next(iter);
/* don't set the level if it's a NONE irq, or if there is
* no change */
if (irq->balance_level != BALANCE_NONE &&
!cpus_equal(irq->mask, irq->old_mask)) {
char buf[PATH_MAX];
FILE *file;
sprintf(buf, "/proc/irq/%i/smp_affinity", irq->number);
file = fopen(buf, "w");
if (!file)
continue;
cpumask_scnprintf(buf, PATH_MAX, irq->mask);
fprintf(file,"%s", buf);
fclose(file);
irq->old_mask = irq->mask;
}
}
}
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