Re: [patch] CFS scheduler, -v8

Ingo Molnar
2007-05-02T16:41:56Z

* Vegard Nossum <vegard@peltkore.net> wrote:

> The sys_sched_yield_to() is not callable from userspace on i386
> because it is not part of the syscall table
> (arch/i386/kernel/syscall_table.S). This causes sysenter_entry
> (arch/i386/kernel/entry.S) to use the wrong count for nr_syscalls (320
> instead of 321) and return with -ENOSYS.

oops, indeed - the patch below should fix this. (x86 should really adopt
the nice x86_64 technique of building the syscall table out of the
unistd.h enumeration definitions.)

Ingo

Index: linux/arch/i386/kernel/syscall_table.S
===================================================================
--- linux.orig/arch/i386/kernel/syscall_table.S
+++ linux/arch/i386/kernel/syscall_table.S
@@ -319,3 +319,4 @@ ENTRY(sys_call_table)
.long sys_move_pages
.long sys_getcpu
.long sys_epoll_pwait
+ .long sys_sched_yield_to /* 320 */