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Issue IPI if needed when sending SIGSTOP

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This commit is contained in:
Masamichi Takagi
2014-09-10 21:19:18 +09:00
parent c78be27442
commit 35dc8a3368
1 changed files with 26 additions and 19 deletions
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45
arch/x86/kernel/syscall.c
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@@ -581,25 +581,25 @@ do_kill(int pid, int tid, int sig)
ihk_mc_spinlock_unlock_noirq(&tproc->sigpendinglock);
}
dkprintf("do_kill,pid=%d,sig=%d\n", pid, sig);
if(doint && !(mask & tproc->sigmask.__val[0]) &&
sig != SIGSTOP && sig != SIGCONT){
int cpuid = tproc->cpu_id;
dkprintf("do_kill,proc=%p,tproc=%p\n", proc, tproc);
if(proc != tproc){
ihk_mc_interrupt_cpu(get_x86_cpu_local_variable(cpuid)->apic_id, 0xd0);
}
pid = tproc->pid;
ihk_mc_spinlock_unlock_noirq(savelock);
cpu_restore_interrupt(irqstate);
kprintf("do_kill,sending kill to mcexec,pid=%d,cpuid=%d\n", pid, cpuid);
interrupt_syscall(pid, cpuid);
}
else{
ihk_mc_spinlock_unlock_noirq(savelock);
cpu_restore_interrupt(irqstate);
}
if(!(mask & tproc->sigmask.__val[0])) {
if(doint && !(mask & tproc->sigmask.__val[0])){
dkprintf("do_kill,proc=%p,tproc=%p\n", proc, tproc);
switch(sig) {
case SIGCONT:
break;
case SIGSTOP:
default:
if(proc != tproc){
dkprintf("do_kill,ipi,pid=%d,cpu_id=%d\n",
tproc->pid, tproc->cpu_id);
ihk_mc_interrupt_cpu(get_x86_cpu_local_variable(tproc->cpu_id)->apic_id, 0xd0);
}
break;
}
ihk_mc_spinlock_unlock_noirq(savelock);
cpu_restore_interrupt(irqstate);
switch(sig) {
case SIGSTOP:
break;
case SIGCONT:
dkprintf("do_kill,SIGCONT\n");
/* Wake up the target only when stopped by SIGSTOP */
@@ -611,9 +611,16 @@ do_kill(int pid, int tid, int sig)
}
break;
default:
dkprintf("do_kill,sending kill to mcexec,pid=%d,cpuid=%d\n",
tproc->pid, tproc->cpu_id);
interrupt_syscall(tproc->pid, tproc->cpu_id);
break;
}
}
}
else{
ihk_mc_spinlock_unlock_noirq(savelock);
cpu_restore_interrupt(irqstate);
}
return rc;
}