Tune your Kernel using adb

How to use adb

This line starts adb ready to manipulate your kernel-image and the running kernel.

• UDP-checksum enable

This changes the value in /vmunix
udp_cksum?W1
This changes the value in /dev/mem
udp_cksum/W1


• Async. NFS writes enable

_rfs_write+0x130?W48780000
_rfs_write+0x1ee?W48780000
_rfs_write+0x130/W48780000
_rfs_write+0x1ee/W48780000


• Paging policy: handspread set to 1/4 of main memory

handspread?W0t4194304
handspread/W0t4194304


• Disable kernel console messages, which don't go thru syslog

noprintf/W 1
noprintf?W 1


• Swap out idle processes after 128 seconds (not 20)

maxslp/W0x80
maxslp?W0x80


• IP-forwarding

_ip_forwarding/Wt-1
_ip_forwarding?Wt-1


or in your KERNEL-Config-File

options IP_FORWARDING=-1


• Disable Keyboard Break (L1-A)

montrap/w4e75
montrap?w4e75


• Set SCSI-Hostadapter (NCR5380) ID to != 7

scsi_host_id?W0x40 eg. SCSI-ID 6
scsi_disre_enable?W0


Restore old Values:

scsi_host_id?W0x80
scsi_disre_enable?W2