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1 vote

Where is 512M RAM from?

Your output of lsmem shows 4 memory blocks "missing", namely blocks 28-31. Your memory block size is 128M, summing to a total size of 512M. These 4 blocks account for your "extra" ...
Jeff Isaacs's user avatar
1 vote
Accepted

Where is 512M RAM from?

Neither is the physical memory space built for your RAM necessarily contiguous, nor is RAM the only thing that gets physical addresses: your computer has memory-mapped buses / devices. Try cat /proc/...
Marcus Müller's user avatar
0 votes

Is it possible to set larger buffers for file access on linux

The Linux kernel uses your entire available RAM for filesystem caching. You cannot make it use more. You could try using a higher values of swappiness but I'm 99% sure it won't help. Probably you need ...
Artem S. Tashkinov's user avatar
0 votes

MetalLB External IP via interface without any IP - can't add route with specific gateway

I on my clusters do the same thing, I had to set for these interfaces net.ipv4.conf.eth220.rp_filter=0 in sysctl, and in netplan I had to specify the address for return routing: eth220: ...
wmp's user avatar
  • 1
0 votes

more up-to-date plasma 6 distro?

if you want a distro that has a up to date plasma you should think about rolling release distros, rolling release distros are distros that as soon as a update is available for a package it's available ...
killertofus's user avatar
2 votes
Accepted

VMware vmmon & vmnet 17.5.1 and Linux kernel 6.8.0 won't compile

Mkubecek's plain patch on the community forum for VMware 17.5.1 couldn't compile either.  On his website at Kernel – 6.8 Released – OK with latest NVIDIA and Patched VMware, there's a link titled ...
lucasart's user avatar
  • 131
10 votes
Accepted

Does mmap() update the page table after every page fault?

will the page table be updated to map the corresponding virtual memory address to the address of the old stale page in the cache (now containing new data)? How does this happen? When mmap() is called,...
Chris Down's user avatar
  • 126k
1 vote

cgroup virtual file system is read only for root, when root has write privileges?

The problem is caused by the kernel using both cgroup versions 1 and 2. It is possible to enable both cgroup versions 1 and 2, which was the case for my issue. This was a problem as if a resource ...
user10709800's user avatar
32 votes
Accepted

How could March 30th 2024 be followed by the 1st?

Well, I get: # date -s '2024-03-30 23:58'; date -d tomorrow Sat Mar 30 23:58:00 EET 2024 Mon Apr 1 00:58:00 EEST 2024 which isn't really surprising since 24 hours after 2024-03-30 23:58 it is 2024-...
ilkkachu's user avatar
  • 139k
0 votes
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What does the "segfault at X" kernel log message mean if X is very large?

You're confusing address spaces here; this is virtual memory of the process address space of the udisks process. You reserved physical address spaces. A segfault happens when a process tries to access ...
Marcus Müller's user avatar
3 votes

When (and how) are file permission/access decisions made in kernel space?

User error, and lack of understanding of trace-cmd (and specifically the -F flag that I was using) was the problem. My assumption was that in running trace-cmd record -p function_graph -F /bin/ls, ...
genericuser99's user avatar
1 vote
Accepted

How does the Linux Kernel store hardware TX and RX filter modes?

This is embarrassing: I have reviewed my code and found that I did fail to properly initialize a struct, just not in quite the way I expected. I also didn't provide the full context needed to solve ...
Robbie's user avatar
  • 63
0 votes

How does the Linux Kernel store hardware TX and RX filter modes?

struct ethtool_ts_info etsi;… ifr.ifr_data = (void *)&etsi; From the kernel documentation for network timesamping, I understand that the ioctl(SIOCSHWTSTAMP) your program calls is supposed to ...
MC68020's user avatar
  • 7,981
1 vote
Accepted

Where do i trace NVME IO within the Linux driver?

A colleague of mine has done something similar for SD cards. He traced the IO after the host has received the response from the card and is about to wrap up the operation (the function is ...
Marcus Müller's user avatar
0 votes

linux scsi: Unit Not Ready, Sense Key, Hardware Error

I had almost the exact same error messages. In my case the drive was a standard external "off the shelf" Western Digital 6tb hard disk w/USB enclosure. Issue occured after power failure to ...
Mtl Dev's user avatar
  • 503

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