Xorg server: Page flip failed: Cannot allocate memory

[KLEIN Nicolas]

Hi

Since we upgraded to xorg-server version 1.20.1, we keep seeing the following entries in Xorg.log:

[  1133.866] (WW) modeset(0): Page flip failed: Cannot allocate memory
[  1133.981] (WW) modeset(0): flip queue failed: Cannot allocate memory
[  1133.981] (WW) modeset(0): Page flip failed: Cannot allocate memory
[  1133.981] (EE) modeset(0): present flip failed
[  1134.011] (WW) modeset(0): flip queue failed: Cannot allocate memory
[  1134.011] (WW) modeset(0): Page flip failed: Cannot allocate memory
[  1134.011] (EE) modeset(0): present flip failed

You will find a full Xorg.log output attached.

This does not happen when running the same application using Xorg-server version 1.19.3.

The errors are similar to the ones described in this thread:

https://bugs.freedesktop.org/show_bug.cgi?id=104598

but with a different chipset (Intel Atom Z36xxx/Z37xxx in my case, i915 kernel driver, i965 DRI) and without running the vkmark tool (we run a JavaFX application):

[root at host]# uname -a
host 3.10.0-957.1.3.el7.x86_64 #1 SMP Thu Nov 15 17:36:42 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
[root at host]# lspci -k
00:00.0 Host bridge: Intel Corporation Atom Processor Z36xxx/Z37xxx Series SoC Transaction Register (rev 0e)
        Subsystem: Intel Corporation Device 0f31
        Kernel driver in use: iosf_mbi_pci
        Kernel modules: iosf_mbi
00:02.0 VGA compatible controller: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Graphics & Display (rev 0e)
        Subsystem: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Graphics & Display
        Kernel driver in use: i915
        Kernel modules: i915
XOrg.log DRI:
[    90.222] (II) modeset(0): [DRI2] Setup complete
[    90.222] (II) modeset(0): [DRI2]   DRI driver: i965
[    90.223] (II) modeset(0): [DRI2]   VDPAU driver: i965

Screen looks ok, no artefacts, app display looks normal, but it produces a lot of useless logs.

Anyone know what the problem is and what can be done about it?

Thank you

Best regards
Nicolas

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