Re: [Qemu-devel] [Bug 543478] Re: qemus pmemsave doesn't accept "/" in filename

[Serge E. Hallyn]

Thanks, Anthony.  Do I understand correctly that that's the
"case '/'" in monitor_parse_command() for '/10x' gdb-like format?

thanks,
-serge

Quoting Anthony Liguori (address@hidden):
> The '/' character is used to create special expressions if double quotes
> aren't used.
> 
> ** Changed in: qemu
>        Status: New => Invalid
> 
> -- 
> qemus pmemsave doesn't accept "/" in filename
> https://bugs.launchpad.net/bugs/543478
> You received this bug notification because you are a member of qemu-
> devel-ml, which is subscribed to QEMU.
> 
> Status in QEMU: Invalid
> Status in ???qemu-kvm??? package in Ubuntu: New
> 
> Bug description:
> Binary package hint: qemu-kvm
> 
> Please see my conversation with qemu:
> 
> (qemu) pmemsave 
> unexpected end of expression
> (qemu) help pmemsave 
> pmemsave addr size file -- save to disk physical memory dump starting at 
> 'addr' of size 'size'
> (qemu) pmemsave 0 512M /tmp/qemu.mem
> pmemsave: extraneous characters at the end of line
> (qemu) pmemsave 0 512 /tmp/qemu.mem
> invalid char in expression
> (qemu) pmemsave 0 512 /tmp/qemu
> invalid char in expression
> (qemu) pmemsave 0 512 qemu.mem
> (qemu) pmemsave 0 512M qemu.mem
> pmemsave: extraneous characters at the end of line
> 
> 
> 
> Let me comment on each one of those:
> (qemu) pmemsave 
> unexpected end of expression
> 
> I expected some sort of hint as to where to get more information. Maybe just 
> a "Type ``help pmemsave'' to get syntax information" would be sufficient.
> 
> 
> (qemu) help pmemsave 
> pmemsave addr size file -- save to disk physical memory dump starting at 
> 'addr' of size 'size'
> 
> Nice. But an example would be nice. My proposal: "I.e.: pmemsave 0 1G 
> /tmp/qemu.mem"
> 
> 
> (qemu) pmemsave 0 512M /tmp/qemu.mem
> pmemsave: extraneous characters at the end of line
> 
> eh. Would be nice if it told me *which* character was "extraneous" and what 
> "extraneous" means. My proposal: "Couldn't parse character at position 23, 
> please see help pmemsave for an example".
> 
> 
> (qemu) pmemsave 0 512 /tmp/qemu.mem
> invalid char in expression
> 
> Hm. Interesting. Again, would be nice if it printed me the offending 
> character. My proposal: "Could not parse character at position 23, please see 
> help pmemsave for an example".
> 
> 
> (qemu) pmemsave 0 512 /tmp/qemu
> invalid char in expression
> 
> Now I got rid of almost everything but it still doesn't work.
> 
> 
> (qemu) pmemsave 0 512 qemu.mem
> 
> aha! No slashes?! Seriously?
> 
> (qemu) pmemsave 0 512M qemu.mem
> pmemsave: extraneous characters at the end of line
> 
> And no "M" or "G" modifiers? If I want to dump 2GB then I'd have to calculate 
> the number in bytes and paste that long string. I expected qemu to be able to 
> parse the K, M, G suffixes.
> 
> Also, I'm wondering why it doesn't offer to dump all memory.
> 
> ProblemType: Bug
> Architecture: amd64
> CurrentDmesg:
>  [150870.676062] kvm_intel: Unknown symbol kvm_vcpu_on_spin
>  [150947.222923] cron[24260]: segfault at 0 ip (null) sp 00007fffe865eed8 
> error 14 in cron[400000+9000]
>  [150947.224187] cron[24261]: segfault at 0 ip (null) sp 00007fffe865eed8 
> error 14 in cron[400000+9000]
> Date: Sun Mar 21 15:03:13 2010
> DistroRelease: Ubuntu 9.10
> KvmCmdLine:
>  UID        PID  PPID  C    SZ   RSS PSR STIME TTY          TIME CMD
>  muelli   23807 23806 13 239738 228464 0 14:54 pts/8    00:01:22 /usr/bin/kvm 
> -S -M pc -m 512 -smp 1 -name vanilla_ubuntu -monitor stdio -boot c -drive 
> file=/home/muelli/qemu/ubuntu8.10/ubuntu.img,if=ide,index=0,boot=on -drive 
> file=,if=ide,media=cdrom,index=2 -net 
> nic,model=rtl8139,macaddr=f0:00:BA:12:34:56 -net 
> user,hostfwd=tcp::2223-:22,smb=/tmp/share -serial pty -snapshot
> MachineType: LENOVO 766636G
> Package: kvm 1:84+dfsg-0ubuntu16+0.11.0+0ubuntu6.3
> PccardctlIdent:
>  Socket 0:
>    no product info available
> PccardctlStatus:
>  Socket 0:
>    no card
> ProcCmdLine: root=/dev/mapper/cryptroot 
> source=UUID=9c3d5596-27c6-4fd5-bfcd-fa8eef6f1230 ro vdso32=0 quiet splash  
> crashkernel=384M-2G:64M,2G-:128M
> ProcVersionSignature: Ubuntu 2.6.32-16.24-generic
> SourcePackage: qemu-kvm
> Uname: Linux 2.6.32-16-generic x86_64
> dmi.bios.date: 03/12/2009
> dmi.bios.vendor: LENOVO
> dmi.bios.version: 7NETC0WW (2.20 )
> dmi.board.name: 766636G
> dmi.board.vendor: LENOVO
> dmi.board.version: Not Available
> dmi.chassis.asset.tag: No Asset Information
> dmi.chassis.type: 10
> dmi.chassis.vendor: LENOVO
> dmi.chassis.version: Not Available
> dmi.modalias: 
> dmi:bvnLENOVO:bvr7NETC0WW(2.20):bd03/12/2009:svnLENOVO:pn766636G:pvrThinkPadX61:rvnLENOVO:rn766636G:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
> dmi.product.name: 766636G
> dmi.product.version: ThinkPad X61
> dmi.sys.vendor: LENOVO
> 
>