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Re: [Qemu-devel] Qemu socket address

From: Ashish Gahlot
Subject: Re: [Qemu-devel] Qemu socket address
Date: Thu, 23 Mar 2017 23:15:30 +0530

Oh, my mistake. I'll remember it from now onwards. Thanks for the help.


On Thu, Mar 23, 2017 at 10:54 PM, Stefan Hajnoczi <address@hidden>

> On Thu, Mar 23, 2017 at 4:11 PM, Ashish Gahlot <address@hidden>
> wrote:
> > Actually, I'm trying to run two separate Qemu processes and the command
> line argument is "qemu-system-x86_64 -kernel kernel -S -s" and the error
> which I get on second invocation is
> > > qemu-system-x86_64: -s: Failed to bind socket: Address already in use
> Please keep address@hidden CCed so that the conversation stays
> on the mailing list.
> This is expected behavior.  The man page says:
>   -s  Shorthand for -gdb tcp::1234, i.e. open a gdbserver on TCP port 1234.
> Two processes cannot listen on the same port*, even with SO_REUSEADDR.
> Please specify unique port numbers using the longer syntax from the man
> page:
>   $ qemu-system-x86_64 -kernel kernel -S -gdb tcp::1234
>   $ qemu-system-x86_64 -kernel kernel -S -gdb tcp::1235
> Now you can tell gdb which QEMU instance to connect to.
> Stefan
> * There is a Linux-specific socket option for allowing multiple
> processes to listen on the same port but it's meant for load balancing
> and wouldn't help in this case.

Ashish Kumar Gahlot
III year, UG
Govt. Engg. College, Ajmer, India

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