URL: <https://savannah.gnu.org/bugs/?61148>
Summary: cutmem not wokring on old machines Project: GNU GRUB Submitted by: axet Submitted on: Sun 12 Sep 2021 09:34:02 AM UTC Category: None Severity: Major Priority: 5 - Normal Item Group: None Status: None Privacy: Public Assigned to: None Originator Name: Originator Email: Open/Closed: Open Release: Release: 2.00 Discussion Lock: Any Reproducibility: None Planned Release: None _______________________________________________________ Details: Hello! My old notebook has memory issues and requires to cut memory region to work propertly. >From kernel perspective it looks like this: [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable [ 0.000000] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved [ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000007f73ffff] usable [ 0.000000] BIOS-e820: [mem 0x000000007f740000-0x000000007f74ffff] ACPI data [ 0.000000] BIOS-e820: [mem 0x000000007f750000-0x000000007f7fffff] ACPI NVS [ 0.000000] e820: remove [mem 0x7e400000-0xfffffffffffffffe] usable [ 0.000000] Notice: NX (Execute Disable) protection missing in CPU! [ 0.000000] user-defined physical RAM map: [ 0.000000] user: [mem 0x0000000000000000-0x000000000009fbff] usable [ 0.000000] user: [mem 0x000000000009fc00-0x000000000009ffff] reserved [ 0.000000] user: [mem 0x00000000000e0000-0x00000000000fffff] reserved [ 0.000000] user: [mem 0x0000000000100000-0x000000007e3fffff] usable [ 0.000000] user: [mem 0x000000007f740000-0x000000007f74ffff] ACPI data [ 0.000000] user: [mem 0x000000007f750000-0x000000007f7fffff] ACPI NVS If this region is not removed my notebook works SUPER slow and every click takes few seconds to process. Same affects grub2. If region in use grub2 takes 2 minutes to boot into kernel. I recorded youtube video: https://youtu.be/BlTii6QL5oY I know grub2 has a 'cutmem' command which is not working propertly. When I issue a: 'cutmem 0x7e40000 0x7f74ffff' grub2 reports no changes is 'lsmmap' which is not correct. I tested 'cutmem' on my second notebook with efi loader, and cutmem affects 'lsmmap' output. Here a few screenshots of grub2 boot process attached. _______________________________________________________ File Attachments: ------------------------------------------------------- Date: Sun 12 Sep 2021 09:34:02 AM UTC Name: 2021-09...@12.20.38.jpg Size: 1MiB By: axet <http://savannah.gnu.org/bugs/download.php?file_id=51896> _______________________________________________________ Reply to this item at: <https://savannah.gnu.org/bugs/?61148> _______________________________________________ Message sent via Savannah https://savannah.gnu.org/