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Re: any remaining for-6.0 issues?

From: Mark Cave-Ayland
Subject: Re: any remaining for-6.0 issues?
Date: Wed, 14 Apr 2021 14:57:56 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.9.0

On 14/04/2021 13:48, Thomas Huth wrote:

On 12/04/2021 17.32, Peter Maydell wrote:
Last call to note anything we need to fix for 6.0 on
https://wiki.qemu.org/Planning/6.0#Known_issues please.
The schedule is to tag rc3 tomorrow, which I would ideally like
to be the last rc before release. After rc3 I will only be taking
fixes for bugs which are absolutely critical...

Hi Peter,

I've seen some intermittend, non-reproducible crashes with usermode QEMU in some of my CI runs, e.g.:



This was only with ccache enabled, so I thought that it might be related to my work-in-progress ccache patches...

... but now Cornelia reported that she has seen such a crash in one of her branches, too (which is completely unrelated to my ccache patches):


That makes me wonder whether we currently have a real problem with user-mode in the master branch? Did anybody else see such problems?

I've definitely seen the same issue as Cornelia in my Gitlab CI builds for the ESP security fixes (first version of which appeared just before rc0). The user builds always fail on "run-tcg-tests-s390x-linux-user" for me.

Looking back through my gitlab CI history for the ESP patches I first see the issue in clang-user here:

  https://gitlab.com/mcayland/qemu/-/pipelines/278781899 (master: ec2e6e01)

and for the PR I just sent the failure is now present in build-user:


The last build I have that succeeded before seeing the clang-user failure is 
this one:

  https://gitlab.com/mcayland/qemu/-/pipelines/271328298 (master: 757acb9a)

That seems to suggest that the issue was first introduced in git master somewhere between 757acb9a and ec2e6e01.



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