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From: Stefan Hajnoczi <stefanha@redhat.com>
To: gongsu@us.ibm.com
Cc: "Eduardo Habkost" <ehabkost@redhat.com>,
	"Igor Mammedov" <imammedo@redhat.com>,
	qemu-devel@nongnu.org,
	"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Marc-André Lureau" <marcandre.lureau@redhat.com>,
	"Richard Henderson" <rth@twiddle.net>
Subject: Re: [PATCH 0/2] RFC: add -mem-shared option
Date: Fri, 13 Dec 2019 11:39:57 +0000	[thread overview]
Message-ID: <20191213113957.GB1186952@stefanha-x1.localdomain> (raw)
In-Reply-To: <20191129102325.55ee16ea@redhat.com>

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On Fri, Nov 29, 2019 at 10:23:25AM +0100, Igor Mammedov wrote:
> On Thu, 28 Nov 2019 16:59:33 +0000
> "Dr. David Alan Gilbert" <dgilbert@redhat.com> wrote:
> 
> > * Marc-André Lureau (marcandre.lureau@redhat.com) wrote:
> > > Hi,
> > > 
> > > Setting up shared memory for vhost-user is a bit complicated from
> > > command line, as it requires NUMA setup such as: m 4G -object
> > > memory-backend-file,id=mem,size=4G,mem-path=/dev/shm,share=on -numa
> > > node,memdev=mem.
> > > 
> > > Instead, I suggest to add a -mem-shared option for non-numa setups,
> > > that will make the -mem-path or anonymouse memory shareable.
> > > 
> > > Comments welcome,  
> > 
> > It's worth checking with Igor (cc'd) - he said he was going to work on
> > something similar.
> > 
> > One other thing this fixes is that it lets you potentially do vhost-user
> > on s390, since it currently has no NUMA.
> Switching to memdev will let vhost-user on s390 work as well.
> This is convenience option and workarounds inability to set main RAM
> properties in current impl. 

Gong Su asked about virtio-fs (vhost-user) on s390.  This patch series
might be the first step to enabling it.

Stefan

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  reply	other threads:[~2019-12-13 21:25 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-28 14:15 [PATCH 0/2] RFC: add -mem-shared option Marc-André Lureau
2019-11-28 14:15 ` [PATCH 1/2] memfd: add qemu_memfd_open() Marc-André Lureau
2019-11-28 14:15 ` [PATCH 2/2] Add -mem-shared option Marc-André Lureau
2019-11-28 16:14   ` Eduardo Habkost
2019-11-28 16:28   ` Igor Mammedov
2019-11-28 20:31     ` Marc-André Lureau
2019-11-29 10:07       ` Igor Mammedov
2019-11-29 10:11         ` Paolo Bonzini
2019-11-29 12:01           ` Markus Armbruster
2019-11-29 20:31             ` Eduardo Habkost
2019-11-29 12:16           ` Igor Mammedov
2019-11-29 17:46             ` Paolo Bonzini
2019-12-02  7:39               ` Igor Mammedov
2019-12-02 21:00                 ` Eduardo Habkost
2019-12-03  8:56                   ` Thomas Huth
2019-12-03 14:43                     ` Igor Mammedov
2019-12-09 20:58                       ` Eduardo Habkost
2019-12-10 10:34                         ` Markus Armbruster
2019-12-10 13:09                           ` Igor Mammedov
2019-12-03 21:34                     ` Eduardo Habkost
2019-11-28 16:10 ` [PATCH 0/2] RFC: add " Eduardo Habkost
2019-11-29  9:18   ` Igor Mammedov
2019-11-29  9:31   ` Paolo Bonzini
2019-11-29 10:23     ` Igor Mammedov
2019-11-29 11:21       ` Paolo Bonzini
2019-11-29 20:21     ` Eduardo Habkost
2019-12-01 15:40       ` Marc-André Lureau
2019-12-01 18:03         ` Paolo Bonzini
2019-11-28 16:59 ` Dr. David Alan Gilbert
2019-11-29  9:23   ` Igor Mammedov
2019-12-13 11:39     ` Stefan Hajnoczi [this message]
2019-12-13 13:12       ` Igor Mammedov
2019-11-29  4:37 ` no-reply
2019-11-29  5:34 ` no-reply
2019-11-29  7:02 ` Gerd Hoffmann
2019-11-29  7:30   ` Marc-André Lureau
2019-11-29  9:27     ` Daniel P. Berrangé
2019-11-29  9:31       ` Marc-André Lureau
2019-11-29  9:42         ` Daniel P. Berrangé
2019-11-29  9:45           ` Marc-André Lureau
2019-11-29 11:44             ` Gerd Hoffmann
2019-11-29  9:33       ` Paolo Bonzini
2019-11-29  9:39         ` Daniel P. Berrangé
2019-11-29  9:52           ` Paolo Bonzini
2019-11-29 10:13         ` Igor Mammedov
2019-11-29 11:20           ` Paolo Bonzini

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