Re: [tip:x86/urgent] x86/mce: Ensure offline CPUs don' t participate in rendezvous process
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- Subject: Re: [tip:x86/urgent] x86/mce: Ensure offline CPUs don' t participate in rendezvous process
- From: Tony W Wang-oc <TonyWWang-oc@xxxxxxxxxxx>
- Date: Thu, 30 May 2019 03:50:39 +0000
- Accept-language: en-US, zh-CN
- Cc: "bp@xxxxxxx" <bp@xxxxxxx>, "hpa@xxxxxxxxx" <hpa@xxxxxxxxx>, "linux-edac@xxxxxxxxxxxxxxx" <linux-edac@xxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "linux-tip-commits@xxxxxxxxxxxxxxx" <linux-tip-commits@xxxxxxxxxxxxxxx>, "mingo@xxxxxxxxxx" <mingo@xxxxxxxxxx>, "peterz@xxxxxxxxxxxxx" <peterz@xxxxxxxxxxxxx>, "stable@xxxxxxxxxxxxxxx" <stable@xxxxxxxxxxxxxxx>, "tglx@xxxxxxxxxxxxx" <tglx@xxxxxxxxxxxxx>, "tony.luck@xxxxxxxxx" <tony.luck@xxxxxxxxx>, "torvalds@xxxxxxxxxxxxxxxxxxxx" <torvalds@xxxxxxxxxxxxxxxxxxxx>, David Wang <DavidWang@xxxxxxxxxxx>
Hi Ashok,
I have two questions about this patch, could you help to check:
1, for broadcast #MC exceptions, this patch seems require #MC exception errors
set MCG_STATUS_RIPV = 1.
But for Intel CPU, some #MC exception errors set MCG_STATUS_RIPV = 0
(like "Recoverable-not-continuable SRAR Type" Errors), for these errors
the patch doesn't seem to work, is that okay?
2, for LMCE exceptions, this patch seems require #MC exception errors
set MCG_STATUS_RIPV = 0 to make sure LMCE be handled normally even
on offline CPU.
For LMCE errors set MCG_STAUS_RIPV = 1, the patch prevents offline CPU
handle these LMCE errors, is that okay?
Thanks
Tony W Wang-oc
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