Hi all:
I'm having some problems with enabling SMP in a 2.6.11.8 UML kernel.
Everything works fine (with only 1 CPU, of course) until I specify the
number of CPUs on the command line via ncpus=4 (or whatever).
Then I get
Checking for /proc/mm...not found
Checking PROT_EXEC mmap in /tmp...OK
Adding 11800576 bytes to physical memory to account for exec-shield gap
Linux version 2.6.11.8 ([EMAIL PROTECTED]) (gcc version 3.3.2 20031022 (Red
Hat Linux 3.3.2-1)) #2 SMP Wed May 11 12:00:59 EDT 2005
Built 1 zonelists
Kernel command line: ncpus=4 stderr=1 root=98:0
PID hash table entries: 256 (order: 8, 4096 bytes)
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory: 29080k available
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
Checking for host processor cmov support...Yes
Checking for host processor xmm support...No
Checking that ptrace can change system call numbers...OK
Checking syscall emulation patch for ptrace...missing
Checking that host ptys support output SIGIO...Yes
Checking that host ptys support SIGIO on close...No, enabling workaround
Checking for /dev/anon on the host...Not available (open failed with
errno 2)
Booting processor 1...
Kernel panic - not syncing: Segfault with no mm
(plus a call trace included at the end)
I wish I could give more, but when I try to compile it in debug mode
(CONFIG_PT_PROXY turned on) I get
kernel/built-in.o(.text+0x76a1): In function `profile_tick':
kernel/profile.c:387: undefined reference to `profile_pc'
collect2: ld returned 1 exit status
KSYM .tmp_kallsyms1.S
nm: .tmp_vmlinux1: No such file or directory
make: *** [.tmp_kallsyms1.S] Error 139
I figured someone might know about this and if there's a patch out yet,
but I couldn't find it referenced on the list. Thanks!
Patrick
Call trace:
EIP: 0023:[<a0049d29>] CPU: 0 Not tainted ESP: 002b:a0e3bb5c EFLAGS:
00010246
Not tainted
EAX: 00100100 EBX: a0e330d8 ECX: a0e330e0 EDX: 00200200
ESI: a0e330d4 EDI: 00000000 EBP: a0e366ac DS: 002b ES: 002b
Call Trace:
a0e3b6b0: [<a001697d>] smp_send_stop+0x6d/0x74
a0e3b6c0: [<a004577e>] notifier_call_chain+0x1e/0x38
a0e3b6e0: [<a0033fd2>] panic+0x5a/0x10c
a0e3b700: [<a001879d>] segv+0x195/0x224
a0e3b710: [<a0016705>] change_signals+0x41/0x6c
a0e3b75c: [<a015b007>] sigemptyset+0x17/0x30
a0e3b770: [<a0016705>] change_signals+0x41/0x6c
a0e3b7e0: [<a0018b6c>] segv_handler+0x160/0x208
a0e3b7e8: [<a0049d29>] __detach_pid+0x69/0xd8
a0e3b800: [<a0018adb>] segv_handler+0xcf/0x208
a0e3b820: [<a001bf69>] sig_handler_common_tt+0x8d/0x10c
a0e3b830: [<a001bfd1>] sig_handler_common_tt+0xf5/0x10c
a0e3b860: [<a0029756>] sig_handler+0x1e/0x34
a0e3b870: [<a0035bde>] unhash_process+0x42/0x54
a0e3b880: [<a015ad38>] __restore+0x0/0x8
a0e3b8c0: [<a0049d29>] __detach_pid+0x69/0xd8
a0e3baac: [<a015b007>] sigemptyset+0x17/0x30
a0e3bac0: [<a0016705>] change_signals+0x41/0x6c
a0e3bad0: [<a0016848>] set_signals+0x6c/0x10c
a0e3bb70: [<a0049da2>] detach_pid+0xa/0x3c
a0e3bb80: [<a0035987>] __unhash_process+0x17/0xc0
a0e3bb90: [<a0035bcd>] unhash_process+0x31/0x54
a0e3bba0: [<a0035bb0>] unhash_process+0x14/0x54
a0e3bbb0: [<a0016bb4>] smp_prepare_cpus+0xc8/0x12c
a0e3bbcc: [<a015b007>] sigemptyset+0x17/0x30
a0e3bbdc: [<a0011198>] init+0x0/0x190
a0e3bbe0: [<a00111bf>] init+0x27/0x190
a0e3bbf0: [<a00111a0>] init+0x8/0x190
a0e3bc00: [<a00140c1>] run_kernel_thread+0x45/0x4c
a0e3bc10: [<a0016705>] change_signals+0x41/0x6c
a0e3bc18: [<a0011198>] init+0x0/0x190
a0e3bc28: [<a001409c>] run_kernel_thread+0x20/0x4c
a0e3bcb0: [<a001674a>] unblock_signals+0xa/0x10
a0e3bcc4: [<a0011198>] init+0x0/0x190
a0e3bcd0: [<a001a40c>] new_thread_handler+0x140/0x17c
a0e3bcd4: [<a0011198>] init+0x0/0x190
a0e3bd20: [<a015ad38>] __restore+0x0/0x8
a0e3bd60: [<a015af42>] sigprocmask+0x1a/0x48
-------------------------------------------------------
This SF.Net email is sponsored by Oracle Space Sweepstakes
Want to be the first software developer in space?
Enter now for the Oracle Space Sweepstakes!
http://ads.osdn.com/?ad_id=7412&alloc_id=16344&op=click
_______________________________________________
User-mode-linux-user mailing list
User-mode-linux-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-user
