L4Re IPC share memory that share file in one Linux filesystem and be visible to other Linuxes

[Joyce Peng(彭美僑)]

Yes, I know this easiest way that mount filesystem via NFS, NBD or SMB.
But I have a mission to evaluate the IPC performance between two Linuxes that run on top of Fiasco.OC.
So our evaluated environment is run a media player in one Linux and this player will access media data in other Linux. And we use uvmm to run two vms that run Linux respectively. 

Regards,
Joyce.Peng(彭美僑)

-----Original Message-----
From: Matthias Lange [mailto:matthias.lange at kernkonzept.com] 
Sent: Thursday, July 06, 2017 4:58 AM
To: l4-hackers at os.inf.tu-dresden.de
Cc: Joyce Peng(彭美僑)
Subject: Re: L4Re IPC share memory that share file in one Linux filesystem and be visible to other Linuxes

Hi,

On 07/05/2017 05:47 AM, Joyce Peng(彭美僑) wrote:
> Hi L4,
> 
>   I want to share a file in one Linux filesystem and be visible to 
> other Linuxes that all run on top Fiasco.OC. It seems an IPC 
> communication between L4re vm tasks. And access a file in Linux 
> filesystem is a mechanism of kernel block device driver. But I only 
> notice two char device drivers that use L4re library l4shmc in 
> L4linux. It is l4ser_shm and l4shmnet. May you give some information about this work how to work.
> Thanks.

Have you thought about how to syncronize access to the filesystem between the two VMs?

The easiest approach would be to setup a (virtual) network connection between the two VMs and let one VM provide the filesystem via NFS, NBD or SMB.

Regards,
Matthias.

> 
> Joyce.peng(彭美僑)