Re: Fix for the APIC hangs in qemux86-64

[Richard Purdie <richard.purdie@linuxfoundation.org>]

On Wed, 2017-12-13 at 19:01 -0500, Bruce Ashfield wrote:
> On 2017-12-13 9:14 AM, Richard Purdie wrote:
> > 
> > On Wed, 2017-12-13 at 09:07 -0500, Bruce Ashfield wrote:
> > > 
> > > On 12/13/2017 09:05 AM, Richard Purdie wrote:
> > > > 
> > > > 
> > > > On Wed, 2017-12-13 at 08:38 -0500, Bruce Ashfield wrote:
> > > > > 
> > > > > 
> > > > > On 12/13/2017 07:34 AM, Richard Purdie wrote:
> > > > > > 
> > > > > > 
> > > > > > 
> > > > > > Hi Bruce,
> > > > > > 
> > > > > > https://bugzilla.yoctoproject.org/show_bug.cgi?id=12301
> > > > > > 
> > > > > > We've root caused the hangs we're seeing in qemux86-64 on
> > > > > > our
> > > > > > autobuilder workers. We've identified a commit on 4.15-rc3
> > > > > > which
> > > > > > fixes
> > > > > > the issue but backporting it to the autobuilder's host
> > > > > > kernels
> > > > > > will
> > > > > > be
> > > > > > a pain.
> > > > > > 
> > > > > > As a workaround I'd like to enable x2apic on qemux86-64.
> > > > > > Since
> > > > > > that
> > > > > > works via MSRs it avoids the problem.
> > > > > > 
> > > > > > Would it be a big issue to set CONFIG_X86_X2APIC=y for
> > > > > > qemux86-
> > > > > > 64?
> > > > > Nope. No big deal at all. I've used the same config i the
> > > > > past
> > > > > when doing work with rt-KVM, so I know it well.
> > > > > 
> > > > > I'll prep a commit, and send it along as part of a rebased
> > > > > set
> > > > > of kernel patches.
> > > > Thanks, much appreciated.
> > > > 
> > > > Did we get to the bottom of the 4.12 selftest failures?
> > > > 
> > > Not yet no. I was distracted for a day, but need to learn how
> > > to run them myself. I was able to log in via serial in my normal
> > > boot flow, so that didn't get me anywhere.
> > > 
> > > Is the selftest HOWO in the yocto docs ? I'll google it up this
> > > morning.
> > No HOWTO but I did give you the command. In a poky checkout run:
> > 
> > oe-selftest -r runqemu.RunqemuTests.test_boot_deploy
> > 
> > which runs a single test that fails (setup DL_DIR/SSTATE_MIRRORS
> > first
> > to speed it up a bit).
> > 
> > It may tell you to clear SANITY_TESTED_DISTROS, I think it auto
> > adds
> > meta-selftest now. You may also need to set DISPLAY to something
> > (e.g.
> > a dummy vncserver).
> > 
> With the cleanup that Ross gave me, I'm now able to see the issue.
> 
> I'll start debugging on Thursday.
> 
> One additional question: what's the right way to find the logs of
> that
> run ?
> 
> I'm getting a bit of noise from:
> 
> ----------------
>       0155:            else:
> Exception: FileNotFoundError: [Errno 2] No such file or directory: 
> '/home/bruce/poky/build/tmp/sysroots-components/x86_64/python3-
> native/usr/lib/python3.5/sqlite3/__pycache__/dump.cpython-35.opt-
> 1.pyc' 
> -> 
> '/home/bruce/poky/build/tmp/work/core2-64-poky-linux/gnu-efi/3.0.6-
> r0/recipe-sysroot-
> native/usr/lib/python3.5/sqlite3/__pycache__/dump.cpython-35.opt-
> 1.pyc'
> 
> ERROR: gnu-efi-3.0.6-r0 do_package: Function failed:
> extend_recipe_sysroot
> ERROR: Logfile of failure stored in: 
> /home/bruce/poky/build/tmp/work/core2-64-poky-linux/gnu-efi/3.0.6-
> r0/temp/log.do_package.10495

You've deleted pyc files from python itself which is bad. I'd
cleansstate python-native and rebuilt it to fix that. Ross meant onto
to run it on the poky meta directory...

Cheers,

Richard