Bug 97125

Summary:

[IVB] operation not permitted when limiting file descriptors and no kernel log when running gem_fd_exhaustion

Product:

DRI

Reporter:

cprigent <christophe.prigent>

Component:

DRM/Intel

Assignee:

Daniel Vetter <daniel>

Status:

CLOSED FIXED

QA Contact:

Intel GFX Bugs mailing list <intel-gfx-bugs>

Severity:

normal

Priority:

medium

CC:

intel-gfx-bugs

Version:

unspecified

Hardware:

x86-64 (AMD64)

OS:

Linux (All)

Whiteboard:

i915 platform:

IVB

i915 features:

GEM/Other

Attachments:

Description	Flags
IVG-gem_fd_exhaustion-kern.log	none

Description cprigent 2016-07-29 08:52:03 UTC

Created attachment 125395 [details]
IVG-gem_fd_exhaustion-kern.log

Platform: IVB
CPU: Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz (family 6, model 58, stepping 9)
Motherboard version: DH77EB
GPU: Intel® HD Graphics 4000 - Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller
Software
Bios: EBH7710H.86A.0096.2012.1012.1645
Linux distribution: Ubuntu 16.04 64 bits
Kernel: 4.7.0-rc7 7eeb04a from http://cgit.freedesktop.org/drm-intel/
  commit 7eeb04a101316645916d4d9df058a9341797f1af
  Author: Chris Wilson <chris@chris-wilson.co.uk>
  Date:   Sun Jul 24 11:00:31 2016 +0100
  drm-intel-nightly: 2016y-07m-24d-09h-59m-54s UTC integration manifest
drm: libdrm-2.4.70 0caa84c from git://anongit.freedesktop.org/mesa/drm
mesa: mesa-11.2.2 3a9f628from git://anongit.freedesktop.org/mesa/mesa
cairo: 1.15.2 db8a7f1 from git://anongit.freedesktop.org/cairo
xserver: xorg-server-1.18.0-497 0b2f308 from git://git.freedesktop.org/git/xorg/xserver
xf86-video-intel: 2.99.917-687 6988b87 from git://git.freedesktop.org/git/xorg/driver/xf86-video-intel
libva: libva-1.7.0-26 c36971c from git://git.freedesktop.org/git/vaapi/libva
vaapi-intel-driver: 1.7.0-58 e554446 from git://git.freedesktop.org/git/vaapi/intel-driver
Intel-Gpu-Tools 1.15-140 e3abb20 from http://anongit.freedesktop.org/git/xorg/app/intel-gpu-tools.git

Steps:
------
1. Execute IGT test:
# ./gem_fd_exhaustion

Actual result:
--------------
1. Test is fail:
# ./gem_fd_exhaustion
IGT-Version: 1.15-ge3abb20 (x86_64) (Linux: 4.7.0-nightly+ x86_64)
System limit for open files is 3259721
(gem_fd_exhaustion:4188) CRITICAL: Test assertion failure function __real_main41, file gem_fd_exhaustion.c:55:
(gem_fd_exhaustion:4188) CRITICAL: Failed assertion: setrlimit(RLIMIT_NOFILE, &rlim) == 0
(gem_fd_exhaustion:4188) CRITICAL: Last errno: 1, Operation not permitted
Stack trace:
  #0 [__igt_fail_assert+0xf1]
  #1 [main+0x1d0]
  #2 [__libc_start_main+0xf0]
  #3 [_start+0x29]
  #4 [<unknown>+0x29]
Test gem_fd_exhaustion failed.
**** DEBUG ****
(gem_fd_exhaustion:4188) INFO: System limit for open files is 3259721
(gem_fd_exhaustion:4188) CRITICAL: Test assertion failure function __real_main41, file gem_fd_exhaustion.c:55:
(gem_fd_exhaustion:4188) CRITICAL: Failed assertion: setrlimit(RLIMIT_NOFILE, &rlim) == 0
(gem_fd_exhaustion:4188) CRITICAL: Last errno: 1, Operation not permitted
****  END  ****
FAIL (0.019s)

Expected result:
----------------
1. Test is Pass

Comment 1 Chris Wilson 2016-07-29 15:32:07 UTC

This should at least downgrade the fail to a skip:

commit 53b4dfdf157b38e459f5c0a6d30a3356b158a127
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Fri Jul 29 14:51:34 2016 +0100

    tests: Skip if we cannot reserve infinite fd for ourselves
    
    A few tests rely on being able to allocate an "infinite" number of fd,
    but current assert instead of skip on more restrictive kernels.
    
    References: https://bugs.freedesktop.org/show_bug.cgi?id=97125
    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

I don't know why some machines don't like us setting "unlimited" rlimits.

Comment 2 Jari Tahvanainen 2017-03-01 15:07:06 UTC

Test is now skip, works as expected I assume...
igt@gem_fd_exhaustion - skip

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