| --- | Log | opened Wed Mar 09 00:00:38 2005 |
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| 03:20 | wow | hi |
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| 05:55 | wow | Kernel panic: Kernel mode fault at addr 0x603c1400, ip 0x804947f |
| 05:55 | wow | ? |
| 05:55 | wow | on a guest start up |
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| 06:10 | _PiGreco_ | hello ppl |
| 06:11 | _PiGreco_ | i have a (maybe) silly question |
| 06:13 | _PiGreco_ | on uml, is it faster working a loop disk or on a host dir tree mounted via hostfs ? |
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| 06:56 | wow | hi back |
| 06:56 | wow | Kernel panic: Kernel mode fault at addr 0x603c1400, ip 0x804947f |
| 06:56 | wow | any idea on what is this error ? |
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| 07:34 | --- | Channel: services.oftc.net changed the topic of #uml to: Welcome to #UML - current releases: 2.4.27-um1 | 2.4.24-um1 (rock solid) | 2.6.9-bs5 | http://user-mode-linux.sf.net (Mainpage) | http://www.usermodelinux.org (communitypage) | http://www.user-mode-linux.org/~blaisorblade/ (SKAS/guest -bb and -bs patches) | http://uml.harlowhill.com/ (Wiki page for documentation) |
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| 09:42 | atari | can anyone tell me what the password of toms rtbt is? |
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| 10:29 | probonic | atari: I think it might be 'root' |
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| 10:36 | jdike | hi guys |
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| 10:58 | bodo | Hi all |
| 10:58 | jdike | Hi bodo |
| 10:59 | bodo | jdike: have restarted my s390 work. |
| 10:59 | jdike | bodo: excellent |
| 11:00 | jdike | bodo: I've been wondering when you were going to get back to that |
| 11:00 | bodo | jdike: I will have to do a lot of work to resync (last work was on 2.6.10-rc3-mm2 ...) |
| 11:00 | bodo | jdike: I wanted to have skas0 settled |
| 11:01 | bodo | jdike: now, I guess, it will be quite stable |
| 11:01 | bodo | jdike: right? |
| 11:01 | jdike | bodo: it seems functionally complete at this point |
| 11:02 | jdike | bodo: I haven't really taken a close look at your most recent stuff yet |
| 11:02 | bodo | jdike: stub-vmas? |
| 11:02 | jdike | bodo: so I will likely be making changes to it |
| 11:02 | jdike | bodo: that, also the ldt stuff |
| 11:02 | bodo | jdike: ldt-changes won't hurt s390 |
| 11:03 | jdike | bodo: yup |
| 11:03 | bodo | jdike: stub-vma changes will need a rework, if mainline stupports many gate-vmas |
| 11:03 | jdike | bodo: having UML handle its own ldts is really the right way to go, I think |
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| 11:03 | jdike | bodo: although it is also clean to just pass things through to the host |
| 11:04 | bodo | jdike: when using stub, it's the only way, to have a ldt in UML, since we can't read host's ldt |
| 11:04 | jdike | bodo: right |
| 11:04 | jdike | bodo: skas0 makes passing stuff through unworkable |
| 11:04 | bodo | jdike: when writing ldt, all operations *are* paqssed through |
| 11:05 | jdike | bodo: yeah, but I was also referring to reads |
| 11:05 | jdike | bodo: that UML is transparent to all ldt operations |
| 11:06 | bodo | jdike: there is a the reason for using UML's own ldt even if stub is not used: |
| 11:06 | | * jdike sees a pending BB mailbombing |
| 11:06 | bodo | jdike: we can have our own empty default-ldt |
| 11:07 | bodo | jdike: with my changes, the lcall-ldts in default-ldt are gone |
| 11:07 | jdike | bodo: yes, but that can be done by installing an empty ldt at startup and then going over to passthrough |
| 11:07 | jdike | bodo: which was my original plan |
| 11:08 | bodo | jdike: the difference is, what a process will read |
| 11:08 | --- | User: *** dcoulson_ is now known as david |
| 11:08 | bodo | jdike: with my changes, it normally will get 0 bytes from a modify_ldt(READ) |
| 11:09 | bodo | jdike: then, the process knows, the default-ldt is active |
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| 11:09 | bodo | jdike: if it reads the default ldt, it will get an empty one in size of the normal default-ldt |
| 11:10 | bodo | jdike: if we clear the host's ldt at startup and a process reads the ldt, it will receive 64kB of empty table ... |
| 11:11 | bodo | jdike: the latter said with transparent reading |
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| 12:39 | | * linbot moshes with jdike |
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| 13:30 | bodo | jdike: I additionally need to define TIF_RESTART_SVC for s390 |
| 13:30 | bodo | jdike: but thread_info.h isn't subarch-specific |
| 13:31 | bodo | jdike: I don't like to make it subarch-specific for that one definition |
| 13:32 | bodo | jdike: do you think, it's ok, to have it in archparama-s390.h? |
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| 15:33 | bodo | jdike: in arch/um/Makefile cross-build patch uses readlink program, which isn't present on our s390 by default |
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| 15:35 | bodo | jdike: I wonder, if this is a general problem? |
| 15:36 | bodo | jdike: maybe, readlink should be substituted? |
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| 15:39 | jdike | bodo: one minute, I have to finish merging something |
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| 15:45 | jdike | bodo: OK |
| 15:45 | jdike | bodo: hold on |
| 15:46 | jdike | bodo: hmmm, there's nothing arch-dependent about it |
| 15:47 | jdike | bodo: but the only instance of it in the kernel tree is UML |
| 15:47 | jdike | bodo: so it's likely not part of the mandatory kernel build runtime environment |
| 15:49 | bodo | jdike: on my i386, it's part of coreutils packet, which isn't installed on our s390 |
| 15:50 | bodo | jdike: I don't know, if UML may assume readlink to be available |
| 15:50 | bodo | jdike: To our discussion about SKAS-LDT: |
| 15:51 | jdike | bodo: on my x86_85, coreutils contains things like ls and tail |
| 15:51 | jdike | bodo: x86_64 |
| 15:52 | bodo | jdike: if PTRACE_LDT is available, it would be possible to hold an flag only, that |
| 15:52 | bodo | jdike: is set, if the LDT is written, but never reset and copied on copy_mm |
| 15:52 | jdike | bodo: BTW, your mm_id definition has union { int fd, int pid }; element with no name |
| 15:53 | jdike | bodo: how did that ever work? |
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| 15:53 | bodo | jdike: then, it would be possible to simulate a empty default-LDT, if flag is not set, |
| 15:53 | bodo | jdike: but transparently read the host's LDT, if the flag is set. |
| 15:54 | --- | <<-- Basic [~Basic@warden.real-time.com] has quit (Quit: ) |
| 15:54 | jdike | bodo: that saves having to have a separate copy of an empty ldt for everything that never touches it? |
| 15:54 | bodo | jdike: the union without name works, as long as the elemants in the union have different names than the |
| 15:55 | bodo | jdike: elements in the structs, that holds the union |
| 15:56 | bodo | jdike: If vthere are conflicting names, the compiler would abort with error message, AFAIK |
| 15:56 | jdike | bodo: OK, let me recheck that |
| 15:57 | bodo | jdike: it's getting late, I should go home |
| 15:58 | bodo | Bye |
| 15:58 | jdike | bodo: bye |
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| 18:11 | ackack | hi |
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| 18:15 | ackack | have a question about boot up time for a UML guest: What is the shortest amount of time it has taken anyone to boot a UML kernel? I want to create a uml kernel that supports 3 things: Network/SSH/ext2-3 fs. And I intend to run many copies of this kernel at one time, but I do not want to leave it running all the time. |
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| 18:16 | ackack | So, I need a kernel that can boot in seconds and be ready for use. Is it possible to get a uml kernel to boot that fast (say no more that 5 seconds on decent hardware)? |
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| 18:17 | jdike | ackack: I can boot up a UML with mysql, apache, and a bunch of other things in ~10 seconds |
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| 18:19 | Darkman | depends on hardware + distro |
| 18:20 | Darkman | debian for example boots up faster then e.g. suse |
| 18:20 | Darkman | cause of simpler startscripts |
| 18:20 | Aiken | on an xp1600 with sshd as the only service I have something booting in 7 seconds |
| 18:27 | ackack | jdike: what kind of hardware do you use to get that result ? |
| 18:28 | --- | <<-- schlumpf [~schlumpf@dsl-084-056-163-053.arcor-ip.net] has quit (Remote host closed the connection) |
| 18:28 | ackack | thing is, I may need to boot 100 uml's at a time. I figure, I wouldn't use any distro, and just make a bare minimum linuxfs to do what I need it to. But if the kernel still take's me 10 sec to boot, startup scripts are just adding insult to injury |
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| 18:33 | jdike | ackack: my laptop |
| 18:33 | jdike | ackack: T41, 1600 MHz, 512M memory |
| 18:35 | timster | I hear it can compile like the blazes as well... |
| 18:36 | jdike | timster: yeah, it's the fastest UML host I have seen |
| 18:36 | timster | :} |
| 18:43 | | * jdike sends another batch of patches to Linus |
| 18:43 | | * mikegrb patches jdike |
| 18:44 | mikegrb | jbot should be patched too ;) |
| 18:44 | mikegrb | he whois every person who talks |
| 18:44 | mikegrb | even if it was just 2 seconds before |
| 18:54 | timster | each process has its address space |
| 18:55 | timster | oops |
| 19:03 | JViz | i have a dedicated IP i can give my UML, which type of config should i use? |
| 19:07 | JViz | tun/tap? |
| 19:08 | JViz | i can't use bridged because my colo doesn't want me using promiscuous mode |
| 19:11 | jdike | JViz: TUN/TAP is the recommended mechanism |
| 19:12 | HIghoS | I haven't gone back to bridged.. since our network started to get flooded +2y ago. The UMLs would crash, couldn't handle it. Haven't looked back since :D |
| 19:12 | JViz | ah |
| 19:15 | jdike | Bridging does simplify the network setup though |
| 19:17 | --- | <<-- AquaJo [~torbofh@p508B348D.dip.t-dialin.net] has quit (Ping timeout: 480 seconds) |
| 19:30 | JViz | if i have a multihomed machine, can i do something like eth0:1=tuntap,,,10.10.10.24 |
| 19:30 | jdike | JViz: no |
| 19:30 | jdike | JViz: eth0=... is plugging a physical card into the UML |
| 19:30 | jdike | JViz: you set up the :1 stuff inside UML |
| 19:33 | JViz | eth0 has a diff address than i want it to use tho |
| 19:34 | JViz | that doesn't matter? |
| 19:35 | Aiken | jdike using 2.6.11 + the incremental patches I just triggered a kernel bug kernel BUG at fs/inode.c:1109! |
| 19:35 | jdike | Aiken: stack trace? |
| 19:35 | jdike | Aiken: is it reproducable? |
| 19:36 | Aiken | yes |
| 19:36 | Aiken | it is reporducable |
| 19:36 | Aiken | by stack track do you mean |
| 19:36 | Aiken | EIP: 0073:[<a01990e1>] CPU: 0 Not tainted ESP: 007b:40001fc4 EFLAGS: 00200212 |
| 19:36 | Aiken | Not tainted |
| 19:36 | Aiken | EAX: 00000000 EBX: 000050ce ECX: 00000013 EDX: 000050ce |
| 19:36 | Aiken | ESI: 000050cc EDI: 00000000 EBP: 40001fd0 DS: 007b ES: 007b |
| 19:36 | Aiken | Call Trace: |
| 19:36 | Aiken | a086b900: [<a00499ad>] notifier_call_chain+0x2d/0x50 |
| 19:36 | Aiken | a086b920: [<a0037b32>] panic+0x72/0x120 |
| 19:36 | Aiken | a086b940: [<a00905d2>] iput+0x92/0xa0 |
| 19:36 | Aiken | that kind of thing? |
| 19:37 | Aiken | trying hostfs and pointed it at an empty directory |
| 19:42 | Aiken | what I find more of a worry are the lines when I do a ps ax like |
| 19:42 | Aiken | 21298 pts/4 T 0:00 ?? @?@? À P?@ ? ? ? ? ?? P?@? À `?@ ? ? ? ? ? `?@? |
| 19:44 | jdike | Aiken: yup, that's what I mean |
| 19:44 | jdike | Aiken: the process names are normal |
| 19:44 | jdike | Aiken: let me try it here |
| 19:46 | Aiken | it is a missing directory when trying hostfs not an empty directory. |
| 19:47 | Aiken | I surpose a panic is understandable in that case but the kernel is still saying BUG |
| 19:51 | jdike | Aiken: OK, a badly handled error |
| 19:53 | Aiken | how safe is turning synchronous disk IO off? |
| 19:53 | Aiken | I have had to suspect filesystems this morning |
| 19:53 | Aiken | so turned it back on |
| 19:54 | jdike | Aiken: I never use it |
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| 20:03 | Aiken | using ext2 of a real partition and a cow image, I get corrupted files with sync io off and everything seems fine with it left on |
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| 20:16 | JViz | can anyone help me with my network config? |
| 20:16 | JViz | please |
| 20:16 | JViz | is it ok to paste network config into this channel? |
| 20:17 | JViz | well |
| 20:17 | JViz | summary |
| 20:18 | JViz | eth0 is on 10.10.11.50, tap1 is on 10.10.11.24, uml is on 10.10.11.51 |
| 20:18 | JViz | i can't ping .24 from the UML |
| 20:18 | JViz | i'm just trying to use the UML net helper |
| 20:18 | Aiken | if bridging is out of the question what about setting up the approp route rules? |
| 20:18 | JViz | route rules? |
| 20:19 | Aiken | on this machine I use bridging, on another I use routing |
| 20:21 | JViz | it says the uml nethelper sets up the route rules |
| 20:22 | Aiken | I generally setup tap0 not long after boot, in the uml I have a static ip assigned and it's init scripts setup the netorking in it |
| 20:23 | JViz | yeah, that's what i have, but i haven't put it in the scripts yet |
| 20:23 | JViz | i'm just trying to get it working first |
| 20:25 | JViz | eth0 Link encap:Ethernet HWaddr FE:FD:0A:0A:0B:33 |
| 20:25 | JViz | inet addr:10.10.11.51 Bcast:10.255.255.255 Mask:255.0.0.0 |
| 20:25 | JViz | that's on the UML |
| 20:26 | JViz | tap1 Link encap:Ethernet HWaddr 00:FF:D9:6B:47:A4 |
| 20:26 | JViz | inet addr:10.10.11.24 Bcast:10.255.255.255 Mask:255.255.255.255 |
| 20:26 | JViz | that's on the host |
| 20:26 | JViz | eth0 Link encap:Ethernet HWaddr 00:D0:B7:89:21:F3 |
| 20:26 | JViz | inet addr:10.10.11.50 Bcast:10.10.11.255 Mask:255.255.255.0 |
| 20:26 | JViz | that's on the host aswell |
| 20:26 | JViz | i should be able to ping .24 from the UML right? |
| 20:26 | JViz | but it's not working |
| 20:26 | Aiken | I use a broadcast of X.X.X.255 and a netmask of 255.255.255.0 |
| 20:27 | Aiken | I think this is how I did it. |
| 20:27 | Aiken | create tap0 |
| 20:27 | Aiken | eth0 (host) = 172.16.31.2, tap0 = 172.16.50.1, eth0 (uml) = 172.16.50.2 |
| 20:27 | Aiken | on host route add -net 172.16.50.0/24 tap0 |
| 20:27 | Aiken | in the uml set the gateway to 172.16.50.1 |
| 20:27 | JViz | will narrowing the broadcast range down to x.x.x.255 or x.x.x.x make it ping? |
| 20:27 | Aiken | I use 172.16.x.x instead of 10.x.x.x |
| 20:28 | Aiken | the proper routing statements will help |
| 20:30 | JViz | localhost root # route |
| 20:30 | JViz | Kernel IP routing table |
| 20:30 | JViz | Destination Gateway Genmask Flags Metric Ref Use Iface |
| 20:30 | JViz | 10.10.11.24 * 255.255.255.255 UH 0 0 0 eth0 |
| 20:30 | JViz | loopback localhost 255.0.0.0 UG 0 0 0 lo |
| 20:31 | JViz | still can't ping .24 =\ |
| 20:32 | jdike | JViz: .24 is the host? |
| 20:36 | JViz | yes |
| 20:36 | JViz | well |
| 20:36 | JViz | .50 and .24 |
| 20:36 | JViz | i have 2 ips |
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| 20:39 | JViz | i want the UML to be on .24 |
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| --- | Log | closed Thu Mar 10 00:01:02 2005 |
