Tag: kernel

  • Fixing recursive fault….

    Code: 0f 0b 68 6e ff 37 80 c2 ed 01 48 c7 c6 ff ff ff ff bf 20 00 RIP {page_remove_rmap+129} RSP Fixing recursive fault but reboot is needed! link : https://bugzilla.redhat.com/show_bug.cgi?id=185481

  • First steps…

    [BITS 32] [global start] [extern _k_main] ; this is in the c file start: call _k_main cli ; stop interrupts hlt ; halt the CPU

  • Some idea about creating a linux kernel patch using Git

    ABOUT creating a linux kernel patch using Git [bash] git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git Initialized empty Git repository in /home/jeffrin/linux-2.6/.git/ remote: Counting objects: 1806930, done. remote: Compressing objects: 100% (278260/278260), done. Receiving objects: 14% (2553100/1806930), 117.83 MiB | 127 KiB/s Resolving deltas: 100% (1513210/1513210), done. $cd linux-2.6 $./scripts/ge genksyms/ get_maintainer.pl $./scripts/get_maintainer.pl –file sound/ac97_bus.c Jaroslav Kysela <perex@perex.cz> Takashi […]

  • Unevictable: 4 kB 0.1

    Unevictable: 4 kB The Unevictable LRU infrastructure addresses the following classes of unevictable pages: + page owned by ram disks or ramfs + page mapped into SHM_LOCKed shared memory regions + page mapped into VM_LOCKED [mlock()ed] vmas Least Recently Used (LRU): discards the least recently used items first. This algorithm requires keeping track of what […]

  • kern.log part 1

    $cut -d ‘ ‘ -f6-20 /var/log/kern.log [22293.016178] kjournald starting. Commit interval 5 seconds [22293.016218] EXT3-fs warning: maximal mount count reached, running e2fsck is recommended [22293.016635] EXT3 FS on sdb2, internal journal [22293.016647] EXT3-fs: mounted filesystem with ordered data mode. $ The First field shown above is a timestamp. The kernel ring buffer is not really […]

  • About RTO retransmission and tcp_orphan_retries

    About  RTO retransmission and tcp_orphan_retries

    About RTO retransmission and tcp_orphan_retries tcp_orphan_retries – INTEGER This value influences the timeout of a locally closed TCP connection,when RTO retransmissions remain unacknowledged. source : Linux Kernel Documentation . 2.6.32 TYPICAL SHELL ON PROC FILESYSTEM [bash] $cat /proc/sys/net/ipv4/tcp_orphan_retries 0 $ [/bash] TYPICAL SOURCE CODE RELATED [c] net/ipv4/tcp_timer.c – 39 identical 99: static int tcp_orphan_retries(struct sock […]