On Sun, Jun 15, 2014 at 03:16:54PM +0200, Peter Zijlstra wrote:
> On Thu, Jun 12, 2014 at 04:48:41PM -0400, Waiman Long wrote:
> > I don't have a good understanding of the kernel alternatives mechanism.
>
> I didn't either; I do now, cost me a whole day reading up on
> alternative/paravirt code
On Sun, Jun 15, 2014 at 03:16:54PM +0200, Peter Zijlstra wrote:
On Thu, Jun 12, 2014 at 04:48:41PM -0400, Waiman Long wrote:
I don't have a good understanding of the kernel alternatives mechanism.
I didn't either; I do now, cost me a whole day reading up on
alternative/paravirt code
On Thu, Jun 12, 2014 at 04:48:41PM -0400, Waiman Long wrote:
> I don't have a good understanding of the kernel alternatives mechanism.
I didn't either; I do now, cost me a whole day reading up on
alternative/paravirt code patching.
See the patches I just send out; I got the 'native' case with
On Thu, Jun 12, 2014 at 04:48:41PM -0400, Waiman Long wrote:
I don't have a good understanding of the kernel alternatives mechanism.
I didn't either; I do now, cost me a whole day reading up on
alternative/paravirt code patching.
See the patches I just send out; I got the 'native' case with
On 06/12/2014 04:17 AM, Peter Zijlstra wrote:
On Fri, May 30, 2014 at 11:44:00AM -0400, Waiman Long wrote:
@@ -19,13 +19,46 @@ extern struct static_key virt_unfairlocks_enabled;
* that the clearing the lock bit is done ASAP without artificial delay
* due to compiler optimization.
*/
On Fri, May 30, 2014 at 11:44:00AM -0400, Waiman Long wrote:
> @@ -19,13 +19,46 @@ extern struct static_key virt_unfairlocks_enabled;
> * that the clearing the lock bit is done ASAP without artificial delay
> * due to compiler optimization.
> */
> +#ifdef CONFIG_PARAVIRT_SPINLOCKS
> +static
On Fri, May 30, 2014 at 11:44:00AM -0400, Waiman Long wrote:
@@ -19,13 +19,46 @@ extern struct static_key virt_unfairlocks_enabled;
* that the clearing the lock bit is done ASAP without artificial delay
* due to compiler optimization.
*/
+#ifdef CONFIG_PARAVIRT_SPINLOCKS
+static
On 06/12/2014 04:17 AM, Peter Zijlstra wrote:
On Fri, May 30, 2014 at 11:44:00AM -0400, Waiman Long wrote:
@@ -19,13 +19,46 @@ extern struct static_key virt_unfairlocks_enabled;
* that the clearing the lock bit is done ASAP without artificial delay
* due to compiler optimization.
*/
This patch adds base para-virtualization support to the queue
spinlock in the same way as was done in the PV ticket lock code. In
essence, the lock waiters will spin for a specified number of times
(QSPIN_THRESHOLD = 2^14) and then halted itself. The queue head waiter,
unlike the other waiter,
This patch adds base para-virtualization support to the queue
spinlock in the same way as was done in the PV ticket lock code. In
essence, the lock waiters will spin for a specified number of times
(QSPIN_THRESHOLD = 2^14) and then halted itself. The queue head waiter,
unlike the other waiter,
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