From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: "Michael S. Tsirkin" <mst-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Roland Dreier <roland-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
"Michael R. Hines"
<mrhines-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>,
Sean Hefty <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Hal Rosenstock
<hal.rosenstock-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Yishai Hadas <yishaih-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
Christoph Lameter <cl-vYTEC60ixJUAvxtiuMwx3w@public.gmane.org>,
"linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
qemu-devel-qX2TKyscuCcdnm+yROfE0A@public.gmane.org
Subject: Re: [PATCH] rdma: don't make pages writeable if not requiested
Date: Thu, 21 Mar 2013 11:21:50 -0600 [thread overview]
Message-ID: <20130321172150.GA3118@obsidianresearch.com> (raw)
In-Reply-To: <20130321171525.GE2994-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
On Thu, Mar 21, 2013 at 07:15:25PM +0200, Michael S. Tsirkin wrote:
> No because application does this:
> init page
>
> ...
>
> after a lot of time
>
> ..
>
> register
> send
> unregister
>
> so it can not be read only.
mprotect(READONLY)
register
send
unregister
mprotect(WRITABLE)
?
With something like GIFT the app already has to give up writing to the
pages while they are moving, so changing the protection seems in line
with that?
Jason
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WARNING: multiple messages have this Message-ID (diff)
From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Roland Dreier <roland@kernel.org>,
"Michael R. Hines" <mrhines@linux.vnet.ibm.com>,
Sean Hefty <sean.hefty@intel.com>,
Hal Rosenstock <hal.rosenstock@gmail.com>,
Yishai Hadas <yishaih@mellanox.com>,
Christoph Lameter <cl@linux.com>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
qemu-devel@nongnu.org
Subject: Re: [PATCH] rdma: don't make pages writeable if not requiested
Date: Thu, 21 Mar 2013 11:21:50 -0600 [thread overview]
Message-ID: <20130321172150.GA3118@obsidianresearch.com> (raw)
In-Reply-To: <20130321171525.GE2994@redhat.com>
On Thu, Mar 21, 2013 at 07:15:25PM +0200, Michael S. Tsirkin wrote:
> No because application does this:
> init page
>
> ...
>
> after a lot of time
>
> ..
>
> register
> send
> unregister
>
> so it can not be read only.
mprotect(READONLY)
register
send
unregister
mprotect(WRITABLE)
?
With something like GIFT the app already has to give up writing to the
pages while they are moving, so changing the protection seems in line
with that?
Jason
WARNING: multiple messages have this Message-ID (diff)
From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Roland Dreier <roland@kernel.org>,
qemu-devel@nongnu.org,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
Yishai Hadas <yishaih@mellanox.com>,
LKML <linux-kernel@vger.kernel.org>,
"Michael R. Hines" <mrhines@linux.vnet.ibm.com>,
Hal Rosenstock <hal.rosenstock@gmail.com>,
Sean Hefty <sean.hefty@intel.com>,
Christoph Lameter <cl@linux.com>
Subject: Re: [Qemu-devel] [PATCH] rdma: don't make pages writeable if not requiested
Date: Thu, 21 Mar 2013 11:21:50 -0600 [thread overview]
Message-ID: <20130321172150.GA3118@obsidianresearch.com> (raw)
In-Reply-To: <20130321171525.GE2994@redhat.com>
On Thu, Mar 21, 2013 at 07:15:25PM +0200, Michael S. Tsirkin wrote:
> No because application does this:
> init page
>
> ...
>
> after a lot of time
>
> ..
>
> register
> send
> unregister
>
> so it can not be read only.
mprotect(READONLY)
register
send
unregister
mprotect(WRITABLE)
?
With something like GIFT the app already has to give up writing to the
pages while they are moving, so changing the protection seems in line
with that?
Jason
next prev parent reply other threads:[~2013-03-21 17:21 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-21 6:18 [PATCH] rdma: don't make pages writeable if not requiested Michael S. Tsirkin
2013-03-21 6:18 ` [Qemu-devel] " Michael S. Tsirkin
2013-03-21 6:18 ` Michael S. Tsirkin
[not found] ` <20130321061838.GA28319-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-03-21 6:55 ` Roland Dreier
2013-03-21 6:55 ` [Qemu-devel] " Roland Dreier
2013-03-21 6:55 ` Roland Dreier
[not found] ` <CAL1RGDUcMj9QVsuQgK+ozw64L6-cGehL7YBUJ1_ckni6TD=Kcg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-03-21 7:03 ` Michael S. Tsirkin
2013-03-21 7:03 ` [Qemu-devel] " Michael S. Tsirkin
2013-03-21 7:03 ` Michael S. Tsirkin
[not found] ` <20130321070357.GD28328-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-03-21 7:15 ` Roland Dreier
2013-03-21 7:15 ` [Qemu-devel] " Roland Dreier
2013-03-21 7:15 ` Roland Dreier
[not found] ` <CAG4TOxPkhOhGmzeA1K4a0Zw8HxS-QkOr-PCx7mJgA+KkuH3ZiQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-03-21 8:51 ` Michael S. Tsirkin
2013-03-21 8:51 ` [Qemu-devel] " Michael S. Tsirkin
2013-03-21 8:51 ` Michael S. Tsirkin
[not found] ` <20130321085107.GE28328-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-03-21 9:13 ` Roland Dreier
2013-03-21 9:13 ` [Qemu-devel] " Roland Dreier
2013-03-21 9:13 ` Roland Dreier
[not found] ` <CAL1RGDVnkLZU2Vge4o3BwDxnAfGv7TQRMqE6ha3MUt39CVp5NQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-03-21 9:39 ` Michael S. Tsirkin
2013-03-21 9:39 ` [Qemu-devel] " Michael S. Tsirkin
2013-03-21 9:39 ` Michael S. Tsirkin
[not found] ` <20130321093946.GG28328-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-03-21 17:11 ` Jason Gunthorpe
2013-03-21 17:11 ` [Qemu-devel] " Jason Gunthorpe
2013-03-21 17:11 ` Jason Gunthorpe
[not found] ` <20130321171115.GA653-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-03-21 17:15 ` Michael S. Tsirkin
2013-03-21 17:15 ` [Qemu-devel] " Michael S. Tsirkin
2013-03-21 17:15 ` Michael S. Tsirkin
[not found] ` <20130321171525.GE2994-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-03-21 17:21 ` Jason Gunthorpe [this message]
2013-03-21 17:21 ` [Qemu-devel] " Jason Gunthorpe
2013-03-21 17:21 ` Jason Gunthorpe
[not found] ` <20130321172150.GA3118-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-03-21 17:42 ` Michael S. Tsirkin
2013-03-21 17:42 ` [Qemu-devel] " Michael S. Tsirkin
2013-03-21 17:42 ` Michael S. Tsirkin
[not found] ` <20130321174237.GA4060-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-03-21 17:57 ` Jason Gunthorpe
2013-03-21 17:57 ` [Qemu-devel] " Jason Gunthorpe
2013-03-21 17:57 ` Jason Gunthorpe
[not found] ` <20130321175732.GA3263-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-03-21 18:03 ` Michael S. Tsirkin
2013-03-21 18:03 ` [Qemu-devel] " Michael S. Tsirkin
2013-03-21 18:03 ` Michael S. Tsirkin
2013-03-21 18:16 ` Michael S. Tsirkin
2013-03-21 18:16 ` [Qemu-devel] " Michael S. Tsirkin
2013-03-21 18:16 ` Michael S. Tsirkin
[not found] ` <20130321181633.GC4366-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-03-21 18:41 ` Jason Gunthorpe
2013-03-21 18:41 ` [Qemu-devel] " Jason Gunthorpe
2013-03-21 18:41 ` Jason Gunthorpe
[not found] ` <20130321184135.GA8044-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2013-03-21 19:15 ` Michael S. Tsirkin
2013-03-21 19:15 ` [Qemu-devel] " Michael S. Tsirkin
2013-03-21 19:15 ` Michael S. Tsirkin
[not found] ` <20130321191541.GB5272-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-03-21 20:09 ` Jason Gunthorpe
2013-03-21 20:09 ` [Qemu-devel] " Jason Gunthorpe
2013-03-21 20:09 ` Jason Gunthorpe
2013-03-21 9:32 ` Michael S. Tsirkin
2013-03-21 9:32 ` [Qemu-devel] " Michael S. Tsirkin
2013-03-21 9:32 ` Michael S. Tsirkin
[not found] ` <20130321093230.GF28328-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-03-21 11:30 ` Michael S. Tsirkin
2013-03-21 11:30 ` [Qemu-devel] " Michael S. Tsirkin
2013-03-21 11:30 ` Michael S. Tsirkin
2013-03-21 12:23 ` Michael R. Hines
2013-03-21 12:23 ` [Qemu-devel] " Michael R. Hines
2013-03-21 12:23 ` Michael R. Hines
2013-03-21 12:32 ` Michael S. Tsirkin
2013-03-21 12:32 ` [Qemu-devel] " Michael S. Tsirkin
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