http://192.168.180.206:8001/ 2026-05-15T19:07:19+00:00 http://192.168.180.206:8001/ http://192.168.180.206:8001/_media/wiki:dokuwiki.svg text/html 2023-02-17T09:37:21+00:00 Anonymous (anonymous@undisclosed.example.com) http://192.168.180.206:8001/linux:kernel:bugs?rev=1676626641&do=diff Bugs Spectre / Meltdown <https://linuxreviews.org/HOWTO_make_Linux_run_blazing_fast_(again)_on_Intel_CPUs> <https://romanrm.net/disable-meltdown-spectre-patches> * Disable Spectre V4 `nospec_store_bypass_disable` (Kernel 4.17) * Disable Spectre V1 `nospectre_v1` (Kernel 4.19) * Control Spectre V2 complexity level: `spectre_v2`, possible values: `off` * Control Disable all Spectre / Meltdown patches text/html 2025-11-01T19:43:26+00:00 Anonymous (anonymous@undisclosed.example.com) http://192.168.180.206:8001/linux:kernel:c-states?rev=1762026206&do=diff C-states ad-hoc disable of C-states cat >/dev/cpu_dma_latency <(echo -e -n "\x0\x0\x0\x0" ; sleep inf) Cause power higher (by 50W) power consumption on Dell PowerEdge R720 (32 x Intel(R) Xeon(R) CPU E5-2650 v2 @ 2.60GHz (2 Sockets)) text/html 2018-09-17T12:47:54+00:00 Anonymous (anonymous@undisclosed.example.com) http://192.168.180.206:8001/linux:kernel:debian?rev=1537188474&do=diff sudo apt-get build-dep linux-image-4.17.0-0.bpo.3-amd64 apt-get source linux-image-xxx cd linux-xxx cp /boot/config-xxx .config make bindeb-pkg LOCALVERSION=-my KDEB_PKGVERSION=$(make kernelversion)-1 -j8 text/html 2016-02-09T08:40:59+00:00 Anonymous (anonymous@undisclosed.example.com) http://192.168.180.206:8001/linux:kernel:debug?rev=1455007259&do=diff Enable DEBUG flag subdir-ccflags-$(CONFIG_MMC_DEBUG) := -DDEBUG subdir-ccflags-y := -DDEBUG ccflags-y := -DDEBUG printk #define pr_emerg(fmt, ...) printk(KERN_EMERG pr_fmt(fmt), ##__VA_ARGS__) #define pr_alert(fmt, ...) printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__) #define pr_crit(fmt, ...) printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__) #define pr_err(fmt, ...) printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) #define pr_warning(fmt, ...) printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) #define … text/html 2018-02-12T13:26:55+00:00 Anonymous (anonymous@undisclosed.example.com) http://192.168.180.206:8001/linux:kernel:module_assistant?rev=1518442015&do=diff apt-get install module-assistant m-a prepare m-a update text/html 2023-03-22T06:07:34+00:00 Anonymous (anonymous@undisclosed.example.com) http://192.168.180.206:8001/linux:kernel:oom?rev=1679465254&do=diff OOM Userspace OOM earlyoom # React if less than 5% of RAM is free, ignore swap space EARLYOOM_ARGS="-m 5 -s 100 -r 600 --avoid '(^|/)(init|X|sshd|lightdm|xfce-.*|gnome-.*)$' --prefer '(^|/)(java|chromium|slack|firefox-esr|teams|code)$'" systemctl restart earlyoom text/html 2025-03-23T10:20:58+00:00 Anonymous (anonymous@undisclosed.example.com) http://192.168.180.206:8001/linux:kernel:sysctl?rev=1742725258&do=diff sysctl huge pages sysctl vm.nr_hugepages=32 cat /proc/meminfo HugePages_Total: 95 HugePages_Free: 72 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB Hugetlb: 194560 kB fs writes - dirty cache Low write performance on Linux servers with large RAM text/html 2023-08-03T07:20:53+00:00 Anonymous (anonymous@undisclosed.example.com) http://192.168.180.206:8001/linux:kernel:sysrq?rev=1691047253&do=diff sysrq Search tags: * Sys Request * sysrq * Alt+SysRq * SysRq may be released before pressing the command key, as long as Alt remains held down. * REISUB Emergency reboot from keyboard REISUB * R - Switch the keyboard from raw mode, used by programs such as X11 and SVGAlib, to XLATE mode text/html 2025-01-11T18:58:48+00:00 Anonymous (anonymous@undisclosed.example.com) http://192.168.180.206:8001/linux:kernel:usb?rev=1736621928&do=diff USB HC died; cleaning up [936017.115917] usb 5-2.2.1.3: USB disconnect, device number 31 [936022.267823] xhci_hcd 0000:07:00.3: xHCI host not responding to stop endpoint command [936022.283651] xhci_hcd 0000:07:00.3: xHCI host controller not responding, assume dead [936022.283681] xhci_hcd 0000:07:00.3: HC died; cleaning up [936022.283722] usb 5-2: USB disconnect, device number 2 [936022.283728] usb 5-2.2: USB disconnect, device number 3 [936022.283732] usb 5-2.2.1: USB disconnect, device num…