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Re: [PATCHv2 0/2] log guest name and memory error type AO, AR for MCEs
From: |
Paolo Bonzini |
Subject: |
Re: [PATCHv2 0/2] log guest name and memory error type AO, AR for MCEs |
Date: |
Wed, 9 Oct 2019 23:19:10 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 |
On 09/10/19 18:44, Mario Smarduch wrote:
> In a large VPC environment we want to log memory error occurrences
> and log them with guest name and type - there are few use cases
>
>
> - if VM crashes on AR mce inform the user about the reason and resolve the
> case
> - if VM hangs notify the user to reboot and resume processing
> - if VM continues to run let the user know, he/she maybe able to correlate
> to vm internal outage
> - Rawhammer attacks - isolate/determine the attacker possible migrating it off
> the hypervisor
> - In general track memory errors on a hyperviosr over time to determine trends
>
> Monitoring our fleet we come across quite a few of these and been
> able to take action where before there were no clues to the causes.
>
> When memory error occurs we get a log entry in qemu log:
>
> Guest [Droplet-12345678] 2019-08-02T05:00:11.940270Z qemu-system-x86_64:
> Guest MCE Memory Error at QEMU addr 0x7f3c7622f000 and GUEST 0x78e42f000
> addr of type BUS_MCEERR_AR injected
>
> with enterprise logging environment we can to take further actions.
>
> v1 -> v2:
> - split into two patches one to get the gustname second to log MCEs
> - addressed comments for MCE logging
>
> Mario Smarduch (2):
> util/qemu-error: add guest name helper with -msg options
> target/i386: log MCE guest and host addresses
>
> include/qemu/error-report.h | 1 +
> qemu-options.hx | 10 ++++++----
> target/i386/kvm.c | 29 ++++++++++++++++++++++++-----
> util/qemu-error.c | 31 +++++++++++++++++++++++++++++++
> vl.c | 5 +++++
> 5 files changed, 67 insertions(+), 9 deletions(-)
>
Queued, thanks.
Paolo