diff options
Diffstat (limited to 'sys/arch/i386/i386/machdep.c')
| -rw-r--r-- | sys/arch/i386/i386/machdep.c | 39 |
1 files changed, 15 insertions, 24 deletions
diff --git a/sys/arch/i386/i386/machdep.c b/sys/arch/i386/i386/machdep.c index b939df2139d..c55cc520598 100644 --- a/sys/arch/i386/i386/machdep.c +++ b/sys/arch/i386/i386/machdep.c @@ -1,4 +1,4 @@ -/* $OpenBSD: machdep.c,v 1.423 2008/04/18 18:54:39 kettenis Exp $ */ +/* $OpenBSD: machdep.c,v 1.424 2008/04/18 20:20:35 kettenis Exp $ */ /* $NetBSD: machdep.c,v 1.214 1996/11/10 03:16:17 thorpej Exp $ */ /*- @@ -2135,29 +2135,6 @@ ibcs2_sendsig(sig_t catcher, int sig, int mask, u_long code, int type, #endif /* - * To send an AST to a process on another cpu we send an IPI to that cpu, - * the IPI schedules a special soft interrupt (that does nothing) and then - * returns through the normal interrupt return path which in turn handles - * the AST. - * - * The IPI can't handle the AST because it usually requires grabbing the - * biglock and we can't afford spinning in the IPI handler with interrupts - * unlocked (so that we take further IPIs and grow our stack until it - * overflows). - */ -void -aston(struct proc *p) -{ -#ifdef MULTIPROCESSOR - if (i386_atomic_testset_i(&p->p_md.md_astpending, 1) == 0 && - p->p_cpu != curcpu()) - i386_fast_ipi(p->p_cpu, LAPIC_IPI_AST); -#else - p->p_md.md_astpending = 1; -#endif -} - -/* * Send an interrupt to process. * * Stack is set up to allow sigcode stored @@ -2356,6 +2333,20 @@ sys_sigreturn(struct proc *p, void *v, register_t *retval) return (EJUSTRETURN); } +/* + * Notify the current process (p) that it has a signal pending, + * process as soon as possible. + */ +void +signotify(struct proc *p) +{ + aston(p); +#ifdef MULTIPROCESSOR + if (p->p_cpu != curcpu() && p->p_cpu != NULL) + i386_send_ipi(p->p_cpu, I386_IPI_NOP); +#endif +} + int waittime = -1; struct pcb dumppcb; |