On Tue, Nov 27, 2018 at 11:46:17AM -0500, Johannes Weiner wrote:
> From 347b69a52d1ec7e71df1108cbc5703d6dd0616ba Mon Sep 17 00:00:00 2001
> From: Johannes Weiner
> Date: Mon, 26 Nov 2018 09:39:23 -0500
> Subject: [PATCH] psi: make disabling/enabling easier for vendor kernels
>
> Mel Gorman
On Tue, Nov 27, 2018 at 11:46:17AM -0500, Johannes Weiner wrote:
> From 347b69a52d1ec7e71df1108cbc5703d6dd0616ba Mon Sep 17 00:00:00 2001
> From: Johannes Weiner
> Date: Mon, 26 Nov 2018 09:39:23 -0500
> Subject: [PATCH] psi: make disabling/enabling easier for vendor kernels
>
> Mel Gorman
On Mon, Nov 26, 2018 at 11:29:26PM +, Mel Gorman wrote:
> The following is a comparision using CONFIG_PSI=n as a baseline against
> your patch and a vanilla kernel
>
> 4.20.0-rc4 4.20.0-rc4
> 4.20.0-rc4
> kconfigdisable-v1r1
On Mon, Nov 26, 2018 at 11:29:26PM +, Mel Gorman wrote:
> The following is a comparision using CONFIG_PSI=n as a baseline against
> your patch and a vanilla kernel
>
> 4.20.0-rc4 4.20.0-rc4
> 4.20.0-rc4
> kconfigdisable-v1r1
On Mon, Nov 26, 2018 at 12:32:18PM -0500, Johannes Weiner wrote:
> >
> > Bit late to notice but this switch should be in
> > Documentation/admin-guide/kernel-parameters.txt. If you really want to
> > match the automatic numa balancing switch then it also should be
> > psi=[enable|disable] instead
On Mon, Nov 26, 2018 at 12:32:18PM -0500, Johannes Weiner wrote:
> >
> > Bit late to notice but this switch should be in
> > Documentation/admin-guide/kernel-parameters.txt. If you really want to
> > match the automatic numa balancing switch then it also should be
> > psi=[enable|disable] instead
On Mon, Nov 26, 2018 at 12:32:18PM -0500, Johannes Weiner wrote:
> On Mon, Nov 26, 2018 at 04:54:47PM +, Mel Gorman wrote:
> > On Mon, Nov 26, 2018 at 11:07:24AM -0500, Johannes Weiner wrote:
> > > @@ -509,6 +509,15 @@ config PSI
> > >
> > > Say N if unsure.
> > >
> > > +config
On Mon, Nov 26, 2018 at 12:32:18PM -0500, Johannes Weiner wrote:
> On Mon, Nov 26, 2018 at 04:54:47PM +, Mel Gorman wrote:
> > On Mon, Nov 26, 2018 at 11:07:24AM -0500, Johannes Weiner wrote:
> > > @@ -509,6 +509,15 @@ config PSI
> > >
> > > Say N if unsure.
> > >
> > > +config
On Mon, Nov 26, 2018 at 04:54:47PM +, Mel Gorman wrote:
> On Mon, Nov 26, 2018 at 11:07:24AM -0500, Johannes Weiner wrote:
> > @@ -509,6 +509,15 @@ config PSI
> >
> > Say N if unsure.
> >
> > +config PSI_DEFAULT_DISABLED
> > + bool "Require boot parameter to enable pressure stall
On Mon, Nov 26, 2018 at 04:54:47PM +, Mel Gorman wrote:
> On Mon, Nov 26, 2018 at 11:07:24AM -0500, Johannes Weiner wrote:
> > @@ -509,6 +509,15 @@ config PSI
> >
> > Say N if unsure.
> >
> > +config PSI_DEFAULT_DISABLED
> > + bool "Require boot parameter to enable pressure stall
On Mon, Nov 26, 2018 at 11:07:24AM -0500, Johannes Weiner wrote:
> Hi Mel,
>
> On Mon, Nov 26, 2018 at 01:34:20PM +, Mel Gorman wrote:
> > Hi Johannes,
> >
> > PSI is a great idea but it does have overhead and if enabled by Kconfig
> > then it incurs a hit whether the user is aware of the
On Mon, Nov 26, 2018 at 11:07:24AM -0500, Johannes Weiner wrote:
> Hi Mel,
>
> On Mon, Nov 26, 2018 at 01:34:20PM +, Mel Gorman wrote:
> > Hi Johannes,
> >
> > PSI is a great idea but it does have overhead and if enabled by Kconfig
> > then it incurs a hit whether the user is aware of the
Hi Mel,
On Mon, Nov 26, 2018 at 01:34:20PM +, Mel Gorman wrote:
> Hi Johannes,
>
> PSI is a great idea but it does have overhead and if enabled by Kconfig
> then it incurs a hit whether the user is aware of the feature or not. I
> think enabling by default is unnecessary as it should only be
Hi Mel,
On Mon, Nov 26, 2018 at 01:34:20PM +, Mel Gorman wrote:
> Hi Johannes,
>
> PSI is a great idea but it does have overhead and if enabled by Kconfig
> then it incurs a hit whether the user is aware of the feature or not. I
> think enabling by default is unnecessary as it should only be
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