diff options
Diffstat (limited to 'mm/oom_kill.c')
| -rw-r--r-- | mm/oom_kill.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/mm/oom_kill.c b/mm/oom_kill.c index b5b25e4dcbbb..6589f60d5018 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -522,6 +522,7 @@ bool __oom_reap_task_mm(struct mm_struct *mm) tlb_gather_mmu(&tlb, mm, start, end); if (mmu_notifier_invalidate_range_start_nonblock(mm, start, end)) { + tlb_finish_mmu(&tlb, start, end); ret = false; continue; } @@ -858,7 +859,7 @@ static void __oom_kill_process(struct task_struct *victim) * in order to prevent the OOM victim from depleting the memory * reserves from the user space under its control. */ - do_send_sig_info(SIGKILL, SEND_SIG_FORCED, victim, PIDTYPE_TGID); + do_send_sig_info(SIGKILL, SEND_SIG_PRIV, victim, PIDTYPE_TGID); mark_oom_victim(victim); pr_err("Killed process %d (%s) total-vm:%lukB, anon-rss:%lukB, file-rss:%lukB, shmem-rss:%lukB\n", task_pid_nr(victim), victim->comm, K(victim->mm->total_vm), @@ -896,7 +897,7 @@ static void __oom_kill_process(struct task_struct *victim) */ if (unlikely(p->flags & PF_KTHREAD)) continue; - do_send_sig_info(SIGKILL, SEND_SIG_FORCED, p, PIDTYPE_TGID); + do_send_sig_info(SIGKILL, SEND_SIG_PRIV, p, PIDTYPE_TGID); } rcu_read_unlock(); @@ -1103,10 +1104,17 @@ bool out_of_memory(struct oom_control *oc) } select_bad_process(oc); - /* Found nothing?!?! Either we hang forever, or we panic. */ - if (!oc->chosen && !is_sysrq_oom(oc) && !is_memcg_oom(oc)) { + /* Found nothing?!?! */ + if (!oc->chosen) { dump_header(oc, NULL); - panic("Out of memory and no killable processes...\n"); + pr_warn("Out of memory and no killable processes...\n"); + /* + * If we got here due to an actual allocation at the + * system level, we cannot survive this and will enter + * an endless loop in the allocator. Bail out now. + */ + if (!is_sysrq_oom(oc) && !is_memcg_oom(oc)) + panic("System is deadlocked on memory\n"); } if (oc->chosen && oc->chosen != (void *)-1UL) oom_kill_process(oc, !is_memcg_oom(oc) ? "Out of memory" : |
