[root@myukr ~]# cat /var/log/messages | grep memory
Jun 22 17:12:11 myukr kernel: kexec: Reserving the low 1M of memory for crashkernel
Jun 22 17:12:11 myukr kernel: Reserving 160MB of memory at 1872MB for crashkernel (System RAM: 2047MB)
Jun 22 17:12:11 myukr kernel: Early memory node ranges
Jun 22 17:12:11 myukr kernel: PM: Registered nosave memory: [mem 0x00000000-0x00000fff]
Jun 22 17:12:11 myukr kernel: PM: Registered nosave memory: [mem 0x0009f000-0x0009ffff]
Jun 22 17:12:11 myukr kernel: PM: Registered nosave memory: [mem 0x000a0000-0x000effff]
Jun 22 17:12:11 myukr kernel: PM: Registered nosave memory: [mem 0x000f0000-0x000fffff]
Jun 22 17:12:11 myukr kernel: Freeing SMP alternatives memory: 32K
Jun 22 17:12:11 myukr kernel: Freeing initrd memory: 18212K
Jun 22 17:12:11 myukr kernel: Non-volatile memory driver v1.3
Jun 22 17:12:11 myukr kernel: Freeing unused decrypted memory: 2036K
Jun 22 17:12:11 myukr kernel: Freeing unused kernel memory: 2476K
Jun 22 17:12:11 myukr kernel: Freeing unused kernel memory: 2012K
Jun 22 17:12:11 myukr kernel: Freeing unused kernel memory: 1160K
Apr 29 10:40:53 myukr kernel: kexec: Reserving the low 1M of memory for crashkernel
Apr 29 10:40:53 myukr kernel: Reserving 160MB of memory at 1872MB for crashkernel (System RAM: 2047MB)
Apr 29 10:40:53 myukr kernel: Early memory node ranges
Apr 29 10:40:53 myukr kernel: PM: Registered nosave memory: [mem 0x00000000-0x00000fff]
Apr 29 10:40:53 myukr kernel: PM: Registered nosave memory: [mem 0x0009f000-0x0009ffff]
Apr 29 10:40:53 myukr kernel: PM: Registered nosave memory: [mem 0x000a0000-0x000effff]
Apr 29 10:40:53 myukr kernel: PM: Registered nosave memory: [mem 0x000f0000-0x000fffff]
Apr 29 10:40:53 myukr kernel: Freeing SMP alternatives memory: 32K
Apr 29 10:40:53 myukr kernel: Freeing initrd memory: 18212K
Apr 29 10:40:53 myukr kernel: Non-volatile memory driver v1.3
Apr 29 10:40:53 myukr kernel: Freeing unused decrypted memory: 2036K
Apr 29 10:40:53 myukr kernel: Freeing unused kernel memory: 2476K
Apr 29 10:40:53 myukr kernel: Freeing unused kernel memory: 2012K
Apr 29 10:40:53 myukr kernel: Freeing unused kernel memory: 1160K
Apr 29 10:46:58 myukr kernel: kexec: Reserving the low 1M of memory for crashkernel
Apr 29 10:46:58 myukr kernel: Reserving 160MB of memory at 1792MB for crashkernel (System RAM: 2047MB)
Apr 29 10:46:58 myukr kernel: Early memory node ranges
Apr 29 10:46:58 myukr kernel: PM: Registered nosave memory: [mem 0x00000000-0x00000fff]
Apr 29 10:46:58 myukr kernel: PM: Registered nosave memory: [mem 0x0009f000-0x0009ffff]
Apr 29 10:46:58 myukr kernel: PM: Registered nosave memory: [mem 0x000a0000-0x000effff]
Apr 29 10:46:58 myukr kernel: PM: Registered nosave memory: [mem 0x000f0000-0x000fffff]
Apr 29 10:46:58 myukr kernel: Freeing SMP alternatives memory: 32K
Apr 29 10:46:58 myukr kernel: Freeing initrd memory: 18212K
Apr 29 10:46:58 myukr kernel: Non-volatile memory driver v1.3
Apr 29 10:46:58 myukr kernel: Freeing unused decrypted memory: 2036K
Apr 29 10:46:58 myukr kernel: Freeing unused kernel memory: 2476K
Apr 29 10:46:58 myukr kernel: Freeing unused kernel memory: 2012K
Apr 29 10:46:58 myukr kernel: Freeing unused kernel memory: 1160K
Apr 29 10:52:59 myukr kernel: kexec: Reserving the low 1M of memory for crashkernel
Apr 29 10:52:59 myukr kernel: Reserving 160MB of memory at 1872MB for crashkernel (System RAM: 2047MB)
Apr 29 10:52:59 myukr kernel: Early memory node ranges
Apr 29 10:52:59 myukr kernel: PM: Registered nosave memory: [mem 0x00000000-0x00000fff]
Apr 29 10:52:59 myukr kernel: PM: Registered nosave memory: [mem 0x0009f000-0x0009ffff]
Apr 29 10:52:59 myukr kernel: PM: Registered nosave memory: [mem 0x000a0000-0x000effff]
Apr 29 10:52:59 myukr kernel: PM: Registered nosave memory: [mem 0x000f0000-0x000fffff]
Apr 29 10:52:59 myukr kernel: Freeing SMP alternatives memory: 32K
Apr 29 10:52:59 myukr kernel: Freeing initrd memory: 18212K
Apr 29 10:52:59 myukr kernel: Non-volatile memory driver v1.3
Apr 29 10:52:59 myukr kernel: Freeing unused decrypted memory: 2036K
Apr 29 10:52:59 myukr kernel: Freeing unused kernel memory: 2476K
Apr 29 10:52:59 myukr kernel: Freeing unused kernel memory: 2012K
Apr 29 10:52:59 myukr kernel: Freeing unused kernel memory: 1160K
Apr 29 11:48:16 myukr kernel: kexec: Reserving the low 1M of memory for crashkernel
Apr 29 11:48:16 myukr kernel: Reserving 160MB of memory at 1872MB for crashkernel (System RAM: 2047MB)
Apr 29 11:48:16 myukr kernel: Early memory node ranges
Apr 29 11:48:16 myukr kernel: PM: Registered nosave memory: [mem 0x00000000-0x00000fff]
Apr 29 11:48:16 myukr kernel: PM: Registered nosave memory: [mem 0x0009f000-0x0009ffff]
Apr 29 11:48:16 myukr kernel: PM: Registered nosave memory: [mem 0x000a0000-0x000effff]
Apr 29 11:48:16 myukr kernel: PM: Registered nosave memory: [mem 0x000f0000-0x000fffff]
Apr 29 11:48:16 myukr kernel: Freeing SMP alternatives memory: 32K
Apr 29 11:48:16 myukr kernel: Freeing initrd memory: 18212K
Apr 29 11:48:16 myukr kernel: Non-volatile memory driver v1.3
Apr 29 11:48:16 myukr kernel: Freeing unused decrypted memory: 2036K
Apr 29 11:48:16 myukr kernel: Freeing unused kernel memory: 2476K
Apr 29 11:48:16 myukr kernel: Freeing unused kernel memory: 2012K
Apr 29 11:48:16 myukr kernel: Freeing unused kernel memory: 1160K
Сделал как тут
https://community.brainycp.com/viewtopic.php?f=9&t=5362 не помогло