push finishproc() to the core that last executed the process,

rather than the core that initially called exec.

push finishproc() to the core that last executed the process,
f58d6070 · Nickolai Zeldovich · f47148e1 · f58d6070 · f58d6070 · f58d6070
--- a/include/proc.hh
+++ b/include/proc.hh
@@ -80,6 +80,7 @@ struct proc : public rcu_freed {
  u64 user_fs_;
  u64 unmap_tlbreq_;
  int exec_cpuid_;
+  int run_cpuid_;
  int in_exec_;
  int uaccess_;


--- a/kernel/exec.cc
+++ b/kernel/exec.cc
@@ -175,6 +175,8 @@ exec(const char *path, char **argv, void *ascopev)
  myproc()->in_exec_ = 0;
  ascope->open("sys_exec2(%s)", path);

+  myproc()->run_cpuid_ = mycpuid();
+
  if((ip = namei(myproc()->cwd, path)) == 0)
    return -1;


--- a/kernel/proc.cc
+++ b/kernel/proc.cc
@@ -370,6 +370,7 @@ fork(int flags)
  *np->tf = *myproc()->tf;
  np->cpu_pin = myproc()->cpu_pin;
  np->exec_cpuid_ = myproc()->exec_cpuid_;
+  np->run_cpuid_ = myproc()->run_cpuid_;

  // Clear %eax so that fork returns 0 in the child.
  np->tf->rax = 0;
@@ -442,7 +443,7 @@ wait(void)
          assert(w);
          w->rip = (void*) finishproc;
          w->arg0 = p;
-          assert(wq_pushto(w, p->exec_cpuid_) >= 0);
+          assert(wq_pushto(w, p->run_cpuid_) >= 0);

          if (!xnspid->remove(pid, &p))
            panic("wait: ns_remove");