[Mesa-dev] [Bug 100613] Regression in Mesa 17 on s390x (zSystems)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100613

--- Comment #33 from intermediadc at hotmail.com <intermediadc at hotmail.com> ---
(In reply to Stefan Dirsch from comment #0)
> I've observed a regression in Mesa 17 on s390x (zSystems). It's hard to
> describe. Here is a video on Youtube.
> 
>   https://youtu.be/xaYauE0Kn8E
> 
> On the left side glxgears is running on x86_64, on the left side it's
> running on s390x(zSystems) - a 64bit bigendian platform. gdm and gnome-shell
> show a black screen. I haven't screenhoted that though (since it's boring).
> 
> I git bisected Mesa and the culprit patch was
> 
> From e827d9175675aaa6cfc0b981e2a80685fb7b3a74 Mon Sep 17 00:00:00 2001
> From: Roland Scheidegger <sroland at vmware.com>
> Date: Wed, 21 Dec 2016 04:43:07 +0100
> Subject: [PATCH] draw: use SoA fetch, not AoS one
> 
> Now that there's some SoA fetch which never falls back, we should always get
> results which are better or at least not worse (something like rgba32f will
> stay the same).
> 
> When reverse-applying this patch on Mesa 17.0.3 the regression on s390x gets
> fixed.
> 
> Mesa has been compiled with
> 
> ./configure --host=s390x-ibm-linux-gnu --build=s390x-ibm-linux-gnu
> --program-prefix= --disable-dependency-tracking --prefix=/usr
> --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc
> --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64
> --libexecdir=/usr/lib --localstatedir=/var --sharedstatedir=/usr/com
> --mandir=/usr/share/man --infodir=/usr/share/info
> --disable-dependency-tracking --enable-gles1 --enable-gles2 --enable-dri
> --with-egl-platforms=x11,drm --enable-shared-glapi --enable-texture-float
> --enable-osmesa --enable-dri3 --enable-shader-cache --enable-gbm
> --enable-glx-tls --with-dri-searchpath=/usr/lib64/dri --enable-gallium-llvm
> --enable-llvm-shared-libs --enable-vdpau --enable-va --enable-xvmc
> --with-dri-drivers=swrast --with-gallium-drivers=swrast
> 'CFLAGS=-fmessage-length=0 -grecord-gcc-switches -fstack-protector -O2 -Wall
> -D_FORTIFY_SOURCE=2 -funwind-tables -fasynchronous-unwind-tables -g -DNDEBUG'

Hi Stefan sorry for asking this small ot,
how is the situation there on RadeonSi Mesa EGL?  
here on Qoriq and on PowerMac G5  glamor crashes if invoche egl_radeonsi and
made the Xorg not usable.
There there is the same situation?

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