Re: [ISSUE] [CLOSED] memtest86+: Hardlocks on systems with more than 4GB of RAM (packaging/compilation issue, upstream build works fine)

[leahneukirchen <leahneukirchen@users.noreply.github.com>]

[-- Attachment #1: Type: text/plain, Size: 2017 bytes --]

Closed issue by Veyrdite on void-packages repository

https://github.com/void-linux/void-packages/issues/11691

Description:
### System
Systems tried:

* Gigabyte P67A-UD3R-B3 + i5-3470S 
* HP Elite 8200 + i5-2500

DDR3 modules used in tests:

* 2x2GB 1600 Ripjaws
* 2x2GB 1333 Microns
* 2x4GB 1333 Samsung
* 1x2GB 1333 Kingston

xuname from one system used: Void 4.19.42_1 x86_64 GenuineIntel notuptodate FFFFFFFFFFF (probably not relevant, kernel is not loaded when bug occurs)

package version: memtest86+-5.01_5

### Behaviour

Memtest86+ 5.01 from the official memtest86+ website: works fine
Memtest86 4.3.7 from the official memtest86 website: works fine
**Memtest86+ 5.01 from the void repos: freezes during the first test if more than 4GB of DIMMs are installed.**

This arbitrary % is completely repeatable and depends on the order + sizes of the DIMMs installed.

Only tested on Sandy and Ivy bridge DDR3 motherboards (see motherboards + processors at top of this report).

### Steps to reproduce the behavior

1. xbps-install memtest86+
2. Boot into it using either grub2 or syslinux (both have been tested)
3. Wait for the % of the very first test to progress until full CPU lockup (usually takes <5 seconds)

(note that the '+' still blinking on the screen is a red herring, this is a 'flashing text' non-OS (GPU?) feature, not an indicator of activity in the test)

To test the official version of memtest86+: download it to your /boot directory and modify your grub/syslinux config to list it.  Don't try and use the pre-made ISOs or bootable USBs, they have really poor system compatibility.

To test the official version of memtest86: its USB-bootable versions have very good compatibility, use them.

### Misc context

Void compiles memtest86+ from source, somewhere in this process the bug is being created or uncovered.  Compare the binaries:
```
179K /boot/memtest86+    (from void repos)
147K /boot/officialmemtest.bin  (from memtest86+ website)
```