Re: [PATCH] powerpc/mce: Add MCE notification chain
From: Nicholas Piggin <npiggin@gmail.com>
Date: 2020-04-03 02:10:16
Ganesh Goudar's on March 30, 2020 5:12 pm:
From: Santosh S <redacted> Introduce notification chain which lets know about uncorrected memory errors(UE). This would help prospective users in pmem or nvdimm subsystem to track bad blocks for better handling of persistent memory allocations. Signed-off-by: Santosh S <redacted> Signed-off-by: Ganesh Goudar <redacted>
Do you have any such users yet? It would be good to refer to an example user and give a brief description of what it does in its notifier.
quoted hunk ↗ jump to hunk
@@ -263,6 +277,7 @@ static void machine_process_ue_event(struct work_struct *work) while (__this_cpu_read(mce_ue_count) > 0) { index = __this_cpu_read(mce_ue_count) - 1; evt = this_cpu_ptr(&mce_ue_event_queue[index]); + blocking_notifier_call_chain(&mce_notifier_list, 0, evt);
Can we really use a blocking notifier here? I'm not sure that we can. Thanks, Nick