I have been building 2.6.25.20 with SKAS4 (host and guest) and was
trying to increase the amount of memory to an instance. According the
Jeff's book, I should be able to do the following:
uml_mconsole test config mem=+32m
However, when I try this it has no apparent effect. 'config mem' shows
now difference before and after 'config mem=+32m', nothing is printed
to dmesg, no change is apparent in a call to 'free -tm' in the guest.
The guest does report that MADV_REMOVE support is okay. Any idea what
is missing? Here is the complete kernel startup messages:
vinel...@gallardo:/vinel/tmp$ /vinel/src/build/guest/linux-2.6.25.20/
linux mem=32m ubd0=ubuntu_804lts.img
Core dump limits :
soft - 0
hard - NONE
Checking that ptrace can change system call numbers...OK
Checking syscall emulation patch for ptrace...missing
Checking for tmpfs mount on /dev/shm...OK
Checking PROT_EXEC mmap in /dev/shm/...OK
Checking for SKAS4 support in the host:
/proc/self/mm ... OK
new_mm ... OK
switching over ... switched back ... OK
PTRACE_SWITCH_MM ... OK
Full CPU fault information in siginfo_t ... OK
Full CPU fault information in PTRACE_GETSIGINFO ... OK
vcpu ... OK
UML running in SKAS4 mode
Linux version 2.6.25.20 (vinel...@gallardo) (gcc version 4.2.4 (Ubuntu
4.2.4-1ubuntu3)) #1 Tue Dec 9 16:13:20 NZDT 2008
Built 1 zonelists in Zone order, mobility grouping on. Total pages:
8080
Kernel command line: mem=32m ubd0=ubuntu_804lts.img root=98:0
PID hash table entries: 128 (order: 7, 1024 bytes)
Dentry cache hash table entries: 4096 (order: 3, 32768 bytes)
Inode-cache hash table entries: 2048 (order: 2, 16384 bytes)
Memory: 28984k available
Mount-cache hash table entries: 256
Checking that host ptys support output SIGIO...Yes
Checking that host ptys support SIGIO on close...No, enabling workaround
net_namespace: 280 bytes
Using 2.6 host AIO
NET: Registered protocol family 16
NET: Registered protocol family 2
IP route cache hash table entries: 512 (order: 0, 4096 bytes)
TCP established hash table entries: 1024 (order: 2, 16384 bytes)
TCP bind hash table entries: 1024 (order: 1, 8192 bytes)
TCP: Hash tables configured (established 1024 bind 1024)
TCP reno registered
mconsole (version 2) initialized on /home/vineladm/.uml/3QIrGu/mconsole
Checking host MADV_REMOVE support...OK
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
io scheduler noop registered
io scheduler anticipatory registered (default)
io scheduler deadline registered
io scheduler cfq registered
TCP cubic registered
NET: Registered protocol family 1
NET: Registered protocol family 17
Initialized stdio console driver
Console initialized on /dev/tty0
console [tty0] enabled
Initializing software serial port version 1
console [mc-1] enabled
ubda: unknown partition table
kjournald starting. Commit interval 5 seconds
EXT3-fs: mounted filesystem with ordered data mode.
VFS: Mounted root (ext3 filesystem) readonly.
* Setting preliminary
keymap... Couldnt get a
file descriptor referring to the console
Couldnt get a file descriptor referring to the console
Couldnt get a file descriptor referring to the console
[fail
]
* Starting basic
networking... [ OK ]
* Starting kernel event
manager... [ OK ]
* Loading hardware
drivers... [ OK ]
* Loading kernel
modules... *
Loading manual drivers...
[ OK ]
* Setting kernel
variables... [ OK ]
* Activating
swap... [ OK ]
* Checking file
systems... fsck
1.40.8 (13-Mar-2008)
[ OK
]
* Mounting local
filesystems... [ OK ]
* Activating swapfile
swap... [ OK ]
* Checking minimum space in /
tmp... [ OK ]
* Skipping firewall: ufw (not
enabled)... [ OK ]
* Configuring network
interfaces... [ OK ]
* Starting system log
daemon... [ OK ]
* Starting kernel log
daemon... [ OK ]
* Starting deferred execution scheduler
atd [ OK ]
* Starting periodic command scheduler
crond [ OK ]
* Running local boot scripts (/etc/
rc.local) [ OK ]
Unable to find swap-space signature
--
Cameron Kerr <ck...@cs.otago.ac.nz>
Teaching Fellow, Computer Science, University of Otago
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