Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

https://fedoraproject.org/wiki/Changes/Power4kPageSize == Summary == On ppc64le, the kernel is currently compiled for 64k page size. This change proposes using the more common 4k page size. Some HPC workloads may be disadvantaged slightly. Workstation users are likely to encounter fewer bugs.

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On 22/02/2021 22:43, Dan Horák wrote: > On Mon, 22 Feb 2021 21:19:26 - > "Tom Seewald" wrote: > >>> On 22/02/2021 21:18, Tom Seewald wrote: >>> >>> >>> >>> Personally, I have an older GPU, RX 580 Polaris series, I will only >>> spend dev time on the AMD Navi GPU issues after AMD makes the R

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On Wed, 24 Mar 2021 16:13:08 +0100 Daniel Pocock wrote: > > > On 22/02/2021 22:43, Dan Horák wrote: > > On Mon, 22 Feb 2021 21:19:26 - > > "Tom Seewald" wrote: > > > >>> On 22/02/2021 21:18, Tom Seewald wrote: > >>> > >>> > >>> > >>> Personally, I have an older GPU, RX 580 Polaris series,

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On 29/03/2021 11:49, Dan Horák wrote: > On Wed, 24 Mar 2021 16:13:08 +0100 > Daniel Pocock wrote: > >> >> >> On 22/02/2021 22:43, Dan Horák wrote: >>> On Mon, 22 Feb 2021 21:19:26 - >>> "Tom Seewald" wrote: >>> > On 22/02/2021 21:18, Tom Seewald wrote: > > > > Personall

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On Mon, 29 Mar 2021 21:33:14 +0200 Daniel Pocock wrote: > > > On 29/03/2021 11:49, Dan Horák wrote: > > On Wed, 24 Mar 2021 16:13:08 +0100 > > Daniel Pocock wrote: > > > >> > >> > >> On 22/02/2021 22:43, Dan Horák wrote: > >>> On Mon, 22 Feb 2021 21:19:26 - > >>> "Tom Seewald" wrote: > >

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On Fri, Feb 12, 2021 at 10:21 AM Ben Cotton wrote: > > https://fedoraproject.org/wiki/Changes/Power4kPageSize > > == Summary == > > On ppc64le, the kernel is currently compiled for 64k page size. > > This change proposes using the more common 4k page size. > > Some HPC workloads may be disadvantag

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On 12/02/2021 21:19, Justin Forbes wrote: > On Fri, Feb 12, 2021 at 10:21 AM Ben Cotton wrote: >> >> https://fedoraproject.org/wiki/Changes/Power4kPageSize >> >> == Summary == >> >> On ppc64le, the kernel is currently compiled for 64k page size. >> >> This change proposes using the more common 4

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

Dnia Fri, Feb 12, 2021 at 10:16:26PM +0100, Daniel Pocock napisał(a): > > > On 12/02/2021 21:19, Justin Forbes wrote: > > On Fri, Feb 12, 2021 at 10:21 AM Ben Cotton wrote: > >> > >> https://fedoraproject.org/wiki/Changes/Power4kPageSize > >> > >> == Summary == > >> > >> On ppc64le, the kernel i

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On 13/02/2021 09:11, Tomasz Torcz wrote: > Dnia Fri, Feb 12, 2021 at 10:16:26PM +0100, Daniel Pocock napisał(a): >> >> >> On 12/02/2021 21:19, Justin Forbes wrote: >>> On Fri, Feb 12, 2021 at 10:21 AM Ben Cotton wrote: https://fedoraproject.org/wiki/Changes/Power4kPageSize ==

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On Sat, 13 Feb 2021 at 05:15, Daniel Pocock wrote: > > > On 13/02/2021 09:11, Tomasz Torcz wrote: > > Dnia Fri, Feb 12, 2021 at 10:16:26PM +0100, Daniel Pocock napisał(a): > >> > >> > >> On 12/02/2021 21:19, Justin Forbes wrote: > >>> On Fri, Feb 12, 2021 at 10:21 AM Ben Cotton > wrote: > >

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On 13/02/2021 18:51, Stephen John Smoogen wrote: > > > On Sat, 13 Feb 2021 at 05:15, Daniel Pocock > wrote: > > > > On 13/02/2021 09:11, Tomasz Torcz wrote: > > Dnia Fri, Feb 12, 2021 at 10:16:26PM +0100, Daniel Pocock napisał(a): > >> > >> > >>

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

Kevin, On 2/13/2021 9:51:48 AM, Stephen John Smoogen wrote: On Sat, 13 Feb 2021 at 05:15, Daniel Pocock mailto:dan...@pocock.pro]> wrote: On 13/02/2021 09:11, Tomasz Torcz wrote: > Dnia Fri, Feb 12, 2021 at 10:16:26PM +0100, Daniel Pocock napisał(a): >> >> >> On 12/02/2021 21:19, Justin Forb

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On Sat, 13 Feb 2021 at 14:06, Alex Perez wrote: > Kevin, > > On 2/13/2021 9:51:48 AM, Stephen John Smoogen wrote: > > > On Sat, 13 Feb 2021 at 05:15, Daniel Pocock wrote: > >> >> >> On 13/02/2021 09:11, Tomasz Torcz wrote: >> > Dnia Fri, Feb 12, 2021 at 10:16:26PM +0100, Daniel Pocock napisał(a

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

> The GPUs also have firmware blobs Could you provide some links to mailing list posts or bug reports where AMD developers confirm that their GPU firmware requires 4k pages? I think having some definitive sources will make this situation more clear. So far the only amdgpu bug report I could fin

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On 14/02/2021 05:41, Tom Seewald wrote: > > The GPUs also have firmware blobs > Could you provide some links to mailing list posts or bug reports where AMD > developers confirm that their GPU firmware requires 4k pages? I think having > some definitive sources will make this situation more cle

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

> A few people mention it in the Raptor forums[2] If there are actually many other page size issues with amdgpu (or other drivers), then from what I can see the raptor/power9 community is unfortunately not reporting these problems upstream which makes it difficult for the developers to be aware

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On Fri, 12 Feb 2021 11:20:21 -0500 Ben Cotton wrote: > https://fedoraproject.org/wiki/Changes/Power4kPageSize > > == Summary == > > On ppc64le, the kernel is currently compiled for 64k page size. > > This change proposes using the more common 4k page size. > > Some HPC workloads may be disadv

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On Mon, Feb 15, 2021 at 6:39 PM Dan Horák wrote: > The open question still is whether we should try to keep 64k as default > as it would allow to find the remaining bugs and offer 4k kernel variant > (COPR for ppc64le should be coming back soon), similar for the > installer (a new remix/spin). Af

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On 15/02/2021 19:47, Gary Buhrmaster wrote: > On Mon, Feb 15, 2021 at 6:39 PM Dan Horák wrote: > >> The open question still is whether we should try to keep 64k as default >> as it would allow to find the remaining bugs and offer 4k kernel variant >> (COPR for ppc64le should be coming back soon

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

Hi, On 2/13/21 10:41 PM, Tom Seewald wrote: > The GPUs also have firmware blobs Could you provide some links to mailing list posts or bug reports where AMD developers confirm that their GPU firmware requires 4k pages? I think having some definitive sources will make this situation more clear

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

> On 15/02/2021 19:47, Gary Buhrmaster wrote: > > On Mon, Feb 15, 2021 at 6:39 PM Dan Horák wrote: > > > >> The open question still is whether we should try to keep 64k as default > >> as it would allow to find the remaining bugs and offer 4k kernel variant > >> (COPR for ppc64le should be coming

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On 16/02/2021 17:05, Peter Robinson wrote: >> On 15/02/2021 19:47, Gary Buhrmaster wrote: >>> On Mon, Feb 15, 2021 at 6:39 PM Dan Horák wrote: >>> The open question still is whether we should try to keep 64k as default as it would allow to find the remaining bugs and offer 4k kernel va

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On Fri, 2021-02-12 at 14:19 -0600, Justin Forbes wrote: > > Some things, like the AMD Radeon GPU drivers, firmware or related > > code, appear to be completely non-functional on the 64k page size. > > Insufficient upstream developers are testing such issues on this > > architecture. > > Just as th

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On 22/02/2021 17:55, David Woodhouse wrote: > On Fri, 2021-02-12 at 14:19 -0600, Justin Forbes wrote: >>> Some things, like the AMD Radeon GPU drivers, firmware or related >>> code, appear to be completely non-functional on the 64k page size. >>> Insufficient upstream developers are testing such

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

Daniel Pocock wrote on 2/22/21 10:41 AM: > I feel that you underestimate the impact of the GPU driver issue > > If the GPU driver doesn't work, people can't even log in and get started > > If the GPU vendors don't test their code on ppc64le (and aarch64) then > those platforms will always lag beh

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

> I feel that you underestimate the impact of the GPU driver issue > > If the GPU driver doesn't work, people can't even log in and get started I still do not understand why no one from the talos/ppc64le community is following up on that amdgpu regression[1] that was introduced with the 5.9 ker

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On 22/02/2021 21:18, Tom Seewald wrote: >> I feel that you underestimate the impact of the GPU driver issue >> >> If the GPU driver doesn't work, people can't even log in and get started > > I still do not understand why no one from the talos/ppc64le community is > following up on that amdgpu r

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

> On 22/02/2021 21:18, Tom Seewald wrote: > > > > Personally, I have an older GPU, RX 580 Polaris series, I will only > spend dev time on the AMD Navi GPU issues after AMD makes the RX 6800 XT > available in my region. I simply don't have that card and I'm not going > to waste money buying the

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On Mon, 22 Feb 2021 21:19:26 - "Tom Seewald" wrote: > > On 22/02/2021 21:18, Tom Seewald wrote: > > > > > > > > Personally, I have an older GPU, RX 580 Polaris series, I will only > > spend dev time on the AMD Navi GPU issues after AMD makes the RX 6800 XT > > available in my region. I si

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

David Woodhouse wrote: > On Fri, 2021-02-12 at 14:19 -0600, Justin Forbes wrote: >> Just as there are many things that expect the 64K page size. I am not >> doing this. > > I don't really find either of those to be compelling arguments, FWIW. > > If we have broken code which makes assumptions a

Re: Fedora 35 Change proposal: POWER 4k page size (System-Wide Change proposal)

On Mon, Feb 22, 2021 at 1:53 PM Alex Perez wrote: > > > > Daniel Pocock wrote on 2/22/21 10:41 AM: > > I feel that you underestimate the impact of the GPU driver issue > > > > If the GPU driver doesn't work, people can't even log in and get started > > > > If the GPU vendors don't test their code