On 04.03.2024 09:50, Roger Pau Monné wrote:
> On Mon, Mar 04, 2024 at 08:54:34AM +0100, Jan Beulich wrote:
>> On 01.03.2024 13:42, Roger Pau Monne wrote:
>>> The current usage of a cmpxchg loop to increase the value of page count is
>>> not
>>> optimal on amd64, as there's already an instruction t
On Mon, Mar 04, 2024 at 08:54:34AM +0100, Jan Beulich wrote:
> On 01.03.2024 13:42, Roger Pau Monne wrote:
> > The current usage of a cmpxchg loop to increase the value of page count is
> > not
> > optimal on amd64, as there's already an instruction to do an atomic add to a
> > 64bit integer.
> >
On 01.03.2024 13:42, Roger Pau Monne wrote:
> The current usage of a cmpxchg loop to increase the value of page count is not
> optimal on amd64, as there's already an instruction to do an atomic add to a
> 64bit integer.
>
> Switch the code in get_page_light() to use an atomic increment, as that a
On 01/03/2024 12:42 pm, Roger Pau Monne wrote:
> The current usage of a cmpxchg loop to increase the value of page count is not
> optimal on amd64, as there's already an instruction to do an atomic add to a
> 64bit integer.
>
> Switch the code in get_page_light() to use an atomic increment, as that
The current usage of a cmpxchg loop to increase the value of page count is not
optimal on amd64, as there's already an instruction to do an atomic add to a
64bit integer.
Switch the code in get_page_light() to use an atomic increment, as that avoids
a loop construct. This slightly changes the ord
