From: Greg KH
Date: Thu, 13 Feb 2014 16:03:20 -0800
> So how about just "open coding" a kref for this structure, as it wants
> something that doesn't fit into the kref model, and should be pretty
> simple to do (you can ensure you get the locking right, unlike almost
> all users of krefs, as Al
On Wed, Feb 12, 2014 at 11:09:53PM -0500, David Miller wrote:
> From: David Miller
> Date: Wed, 12 Feb 2014 23:05:06 -0500 (EST)
>
> > From: Greg KH
> > Date: Wed, 12 Feb 2014 17:39:02 -0800
> >
> >> Yes, that's horrible as well, but as was already pointed out in this
> >> thread, you can't
On Wed, Feb 12, 2014 at 11:09:53PM -0500, David Miller wrote:
From: David Miller da...@davemloft.net
Date: Wed, 12 Feb 2014 23:05:06 -0500 (EST)
From: Greg KH gre...@linuxfoundation.org
Date: Wed, 12 Feb 2014 17:39:02 -0800
Yes, that's horrible as well, but as was already pointed out
From: Greg KH gre...@linuxfoundation.org
Date: Thu, 13 Feb 2014 16:03:20 -0800
So how about just open coding a kref for this structure, as it wants
something that doesn't fit into the kref model, and should be pretty
simple to do (you can ensure you get the locking right, unlike almost
all
From: David Miller
Date: Wed, 12 Feb 2014 23:05:06 -0500 (EST)
> From: Greg KH
> Date: Wed, 12 Feb 2014 17:39:02 -0800
>
>> Yes, that's horrible as well, but as was already pointed out in this
>> thread, you can't rely on that value to really be "1" after reading it
>> due to the way krefs
From: Greg KH
Date: Wed, 12 Feb 2014 17:39:02 -0800
> Yes, that's horrible as well, but as was already pointed out in this
> thread, you can't rely on that value to really be "1" after reading it
> due to the way krefs work, what happened if someone else just grabbed
> it?
>
> If all they want
On Wed, Feb 12, 2014 at 07:06:37PM -0500, David Miller wrote:
> From: Greg Kroah-Hartman
> Date: Wed, 12 Feb 2014 08:56:30 -0800
>
> > On Wed, Feb 12, 2014 at 06:38:21PM +0200, Michael S. Tsirkin wrote:
> >> It is sometimes useful to get the value of the reference count after
> >> decrement.
>
On Wed, 12 February 2014 19:06:37 -0500, David Miller wrote:
>
> It isn't being used to determine when to destroy things.
>
> They use it to as a heuristic of when to trigger polling.
>
> Each ubuf attached gets a kref to the higher level virtio_net buffer
> holding object, they want to trigger
From: Greg Kroah-Hartman
Date: Wed, 12 Feb 2014 08:56:30 -0800
> On Wed, Feb 12, 2014 at 06:38:21PM +0200, Michael S. Tsirkin wrote:
>> It is sometimes useful to get the value of the reference count after
>> decrement.
>> For example, vhost wants to execute some periodic cleanup operations
>>
Hi
On Wed, Feb 12, 2014 at 9:35 AM, Michael S. Tsirkin wrote:
> On Wed, Feb 12, 2014 at 08:56:30AM -0800, Greg Kroah-Hartman wrote:
>> On Wed, Feb 12, 2014 at 06:38:21PM +0200, Michael S. Tsirkin wrote:
>> > It is sometimes useful to get the value of the reference count after
>> > decrement.
>>
On Wed, Feb 12, 2014 at 07:35:24PM +0200, Michael S. Tsirkin wrote:
> On Wed, Feb 12, 2014 at 08:56:30AM -0800, Greg Kroah-Hartman wrote:
> > On Wed, Feb 12, 2014 at 06:38:21PM +0200, Michael S. Tsirkin wrote:
> > > It is sometimes useful to get the value of the reference count after
> > >
On Wed, Feb 12, 2014 at 08:56:30AM -0800, Greg Kroah-Hartman wrote:
> On Wed, Feb 12, 2014 at 06:38:21PM +0200, Michael S. Tsirkin wrote:
> > It is sometimes useful to get the value of the reference count after
> > decrement.
> > For example, vhost wants to execute some periodic cleanup operations
On Wed, Feb 12, 2014 at 06:38:21PM +0200, Michael S. Tsirkin wrote:
> It is sometimes useful to get the value of the reference count after
> decrement.
> For example, vhost wants to execute some periodic cleanup operations
> once number of references drops below a specific value, before it
>
It is sometimes useful to get the value of the reference count after
decrement.
For example, vhost wants to execute some periodic cleanup operations
once number of references drops below a specific value, before it
reaches zero (for efficiency).
Add an API to do this atomically and efficiently
It is sometimes useful to get the value of the reference count after
decrement.
For example, vhost wants to execute some periodic cleanup operations
once number of references drops below a specific value, before it
reaches zero (for efficiency).
Add an API to do this atomically and efficiently
On Wed, Feb 12, 2014 at 06:38:21PM +0200, Michael S. Tsirkin wrote:
It is sometimes useful to get the value of the reference count after
decrement.
For example, vhost wants to execute some periodic cleanup operations
once number of references drops below a specific value, before it
reaches
On Wed, Feb 12, 2014 at 08:56:30AM -0800, Greg Kroah-Hartman wrote:
On Wed, Feb 12, 2014 at 06:38:21PM +0200, Michael S. Tsirkin wrote:
It is sometimes useful to get the value of the reference count after
decrement.
For example, vhost wants to execute some periodic cleanup operations
once
On Wed, Feb 12, 2014 at 07:35:24PM +0200, Michael S. Tsirkin wrote:
On Wed, Feb 12, 2014 at 08:56:30AM -0800, Greg Kroah-Hartman wrote:
On Wed, Feb 12, 2014 at 06:38:21PM +0200, Michael S. Tsirkin wrote:
It is sometimes useful to get the value of the reference count after
decrement.
Hi
On Wed, Feb 12, 2014 at 9:35 AM, Michael S. Tsirkin m...@redhat.com wrote:
On Wed, Feb 12, 2014 at 08:56:30AM -0800, Greg Kroah-Hartman wrote:
On Wed, Feb 12, 2014 at 06:38:21PM +0200, Michael S. Tsirkin wrote:
It is sometimes useful to get the value of the reference count after
From: Greg Kroah-Hartman gre...@linuxfoundation.org
Date: Wed, 12 Feb 2014 08:56:30 -0800
On Wed, Feb 12, 2014 at 06:38:21PM +0200, Michael S. Tsirkin wrote:
It is sometimes useful to get the value of the reference count after
decrement.
For example, vhost wants to execute some periodic
On Wed, 12 February 2014 19:06:37 -0500, David Miller wrote:
It isn't being used to determine when to destroy things.
They use it to as a heuristic of when to trigger polling.
Each ubuf attached gets a kref to the higher level virtio_net buffer
holding object, they want to trigger
On Wed, Feb 12, 2014 at 07:06:37PM -0500, David Miller wrote:
From: Greg Kroah-Hartman gre...@linuxfoundation.org
Date: Wed, 12 Feb 2014 08:56:30 -0800
On Wed, Feb 12, 2014 at 06:38:21PM +0200, Michael S. Tsirkin wrote:
It is sometimes useful to get the value of the reference count after
From: Greg KH gre...@linuxfoundation.org
Date: Wed, 12 Feb 2014 17:39:02 -0800
Yes, that's horrible as well, but as was already pointed out in this
thread, you can't rely on that value to really be 1 after reading it
due to the way krefs work, what happened if someone else just grabbed
it?
From: David Miller da...@davemloft.net
Date: Wed, 12 Feb 2014 23:05:06 -0500 (EST)
From: Greg KH gre...@linuxfoundation.org
Date: Wed, 12 Feb 2014 17:39:02 -0800
Yes, that's horrible as well, but as was already pointed out in this
thread, you can't rely on that value to really be 1 after
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