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Implement Linux sched_{set|get}affinity

This commit is contained in:
manu 2005-11-05 08:06:58 +00:00
parent 67fcd6abf5
commit 41455b2ed0
2 changed files with 86 additions and 5 deletions
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8
sys/compat/linux/arch/amd64/syscalls.master
View File

@ -1,4 +1,4 @@
$NetBSD: syscalls.master,v 1.7 2005/11/04 16:51:56 manu Exp $
$NetBSD: syscalls.master,v 1.8 2005/11/05 08:06:58 manu Exp $
; @(#)syscalls.master 8.1 (Berkeley) 7/19/93
@ -356,8 +356,10 @@
202 STD { int linux_sys_futex(int *uaddr, int op, int val, \
const struct timespec *timeout, int *uaddr2, \
int val3); }
203 UNIMPL sched_setaffinity
204 UNIMPL sched_getaffinity
203 STD { int linux_sys_sched_setaffinity(pid_t pid, \
unsigned int len, unsigned long *mask); }
204 STD { int linux_sys_sched_getaffinity(pid_t pid, \
unsigned int len, unsigned long *mask); }
205 UNIMPL set_thread_area
206 UNIMPL io_setup
207 UNIMPL io_destroy

83
sys/compat/linux/common/linux_sched.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: linux_sched.c,v 1.21 2005/11/05 00:47:26 manu Exp $ */
/* $NetBSD: linux_sched.c,v 1.22 2005/11/05 08:06:58 manu Exp $ */
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
@ -42,12 +42,14 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: linux_sched.c,v 1.21 2005/11/05 00:47:26 manu Exp $");
__KERNEL_RCSID(0, "$NetBSD: linux_sched.c,v 1.22 2005/11/05 08:06:58 manu Exp $");
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/systm.h>
#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <sys/sa.h>
#include <sys/syscallargs.h>
#include <sys/wait.h>
@ -445,3 +447,80 @@ linux_sys_gettid(l, v, retval)
return 0;
}
#endif /* LINUX_NPTL */
int
linux_sys_sched_getaffinity(l, v, retval)
struct lwp *l;
void *v;
register_t *retval;
{
struct linux_sys_sched_getaffinity_args /* {
syscallarg(pid_t) pid;
syscallarg(unsigned int) len;
syscallarg(unsigned long *) mask;
} */ *uap = v;
int error;
int ret;
int ncpu;
int name[2];
size_t sz;
char *data;
int *retp;
if (SCARG(uap, mask) == NULL)
return EINVAL;
if (SCARG(uap, len) < sizeof(int))
return EINVAL;
if (pfind(SCARG(uap, pid)) == NULL)
return ESRCH;
/*
* return the actual number of CPU, tag all of them as available
* The result is a mask, the first CPU being in the least significant
* bit.
*/
name[0] = CTL_HW;
name[1] = HW_NCPU;
sz = sizeof(ncpu);
if ((error = old_sysctl(&name[0], 2, &ncpu, &sz, NULL, 0, NULL)) != 0)
return error;
ret = (1 << ncpu) - 1;
data = malloc(SCARG(uap, len), M_TEMP, M_WAITOK|M_ZERO);
retp = (int *)&data[SCARG(uap, len) - sizeof(ret)];
*retp = ret;
if ((error = copyout(data, SCARG(uap, mask), SCARG(uap, len))) != 0)
return error;
free(data, M_TEMP);
return 0;
}
int
linux_sys_sched_setaffinity(l, v, retval)
struct lwp *l;
void *v;
register_t *retval;
{
struct linux_sys_sched_setaffinity_args /* {
syscallarg(pid_t) pid;
syscallarg(unsigned int) len;
syscallarg(unsigned long *) mask;
} */ *uap = v;
if (pfind(SCARG(uap, pid)) == NULL)
return ESRCH;
/* Let's ignore it */
#ifdef DEBUG_LINUX
printf("linux_sys_sched_setaffinity\n");
#endif
return 0;
};