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epoll, ppoll: deschedule on offload, don't do it when exiting system call

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Change-Id: Ib1d0553ca5c50f4de055a1a5fe40b406c9c26dc7
This commit is contained in:
Masamichi Takagi
2020-06-15 12:58:28 +09:00
parent 1910543380
commit d4056acfc3
1 changed files with 7 additions and 2 deletions
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9
kernel/syscall.c
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@ -243,7 +243,8 @@ long do_syscall(struct syscall_request *req, int cpu)
DECLARE_WAITQ_ENTRY(scd_wq_entry, cpu_local_var(current));
if (req->number == __NR_epoll_wait ||
req->number == __NR_epoll_pwait)
req->number == __NR_epoll_pwait ||
req->number == __NR_ppoll)
goto schedule;
cpu_pause();
@ -10280,7 +10281,11 @@ long syscall(int num, ihk_mc_user_context_t *ctx)
}
#endif // PROFILE_ENABLE
if (smp_load_acquire(&v->flags) & CPU_FLAG_NEED_RESCHED) {
/* Do not deschedule when returning from an event (e.g., MPI) */
if (!(num == __NR_epoll_wait ||
num == __NR_epoll_pwait ||
num == __NR_ppoll) &&
smp_load_acquire(&v->flags) & CPU_FLAG_NEED_RESCHED) {
check_need_resched();
}