Hi,
I've recently upgraded my UML setup from a 2.6.8+skas3 host kernel to a
2.6.18+skas on debian etch. I've also upgraded to using the nagafix
kernel32-2.6.24.3 kernel to run my guest instances in.
I uses to be able to specify mem=3072M to the guest instance, but when I
try this now I see :
[EMAIL PROTECTED]:~/umltest$ /usr/bin/kernel32-2.6.24.3 udb0=./root_fs mem=3072M
Core dump limits :
soft - 0
hard - NONE
Checking that ptrace can change system call numbers...OK
Checking syscall emulation patch for ptrace...OK
Checking advanced syscall emulation patch for ptrace...OK
Checking for tmpfs mount on /dev/shm...OK
Checking PROT_EXEC mmap in /dev/shm/...OK
Checking for the skas3 patch in the host:
- /proc/mm...found
- PTRACE_FAULTINFO...found
- PTRACE_LDT...found
UML running in SKAS3 mode
CONFIG_HIGHMEM not enabled - physical memory shrunk to 3045064704 bytes
Segmentation fault
If I boot with something like mem=2800M it boots ok. I have a tmpfs
partion defined on the host :
tmpfs 4.0G 1.3G 2.8G 31% /dev/shm
(which is empty when no guest is running).
I have the following set in my host kernel :
CONFIG_HIGHMEM4G=y
CONFIG_PAGE_OFFSET=0xC0000000
CONFIG_HIGHMEM=y
CONFIG_PROC_MM=y
Anybody have any ideas what might be setting this limit, as I'd expect
to be able to specify up to mem=4096M
Thanks,
Rob
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