[v3] xen/x86: Change stub page freeing to fix smt=0

[PATCH v3 0/2] xen/x86: Change stub page freeing to fix smt=0

Jason Andryuk posted 2 patches 4 days, 6 hours ago

Diff against v1 v2
Download series mbox

Patches applied successfully (tree, apply log)
git fetch https://gitlab.com/xen-project/patchew/xen tags/patchew/20260609000638.121027-1-jason.andryuk@amd.com

xen/arch/x86/include/asm/stubs.h |   2 +-
xen/arch/x86/setup.c             |   3 +-
xen/arch/x86/smpboot.c           | 114 +++++++++++++++++++++----------
3 files changed, 79 insertions(+), 40 deletions(-)

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[PATCH v3 0/2] xen/x86: Change stub page freeing to fix smt=0

Posted by Jason Andryuk 4 days, 6 hours ago

This is a third approach to fixing the stub page handling that is
broken with !CONFIG_PV and smt=0.

There is a CPU-indexed stubs array and a NUMA node-indexed node_stubs
for allocating the stub buffers.

From v2, this patch
  xen/x86: Remove unneeded stub_page setting
is dropped as stub_page is removed as part of patch 2.

Jason Andryuk (2):
  xen/x86: Return virtual address from alloc_stub_page()
  xen/x86: Change stub page allocation/free

 xen/arch/x86/include/asm/stubs.h |   2 +-
 xen/arch/x86/setup.c             |   3 +-
 xen/arch/x86/smpboot.c           | 114 +++++++++++++++++++++----------
 3 files changed, 79 insertions(+), 40 deletions(-)

-- 
2.54.0

Re: [PATCH v3 0/2] xen/x86: Change stub page freeing to fix smt=0

Posted by Oleksii Kurochko 2 days, 18 hours ago


On 6/9/26 2:06 AM, Jason Andryuk wrote:
> This is a third approach to fixing the stub page handling that is
> broken with !CONFIG_PV and smt=0.
> 
> There is a CPU-indexed stubs array and a NUMA node-indexed node_stubs
> for allocating the stub buffers.
> 
>  From v2, this patch
>    xen/x86: Remove unneeded stub_page setting
> is dropped as stub_page is removed as part of patch 2.
> 
> Jason Andryuk (2):
>    xen/x86: Return virtual address from alloc_stub_page()
>    xen/x86: Change stub page allocation/free
> 
>   xen/arch/x86/include/asm/stubs.h |   2 +-
>   xen/arch/x86/setup.c             |   3 +-
>   xen/arch/x86/smpboot.c           | 114 +++++++++++++++++++++----------
>   3 files changed, 79 insertions(+), 40 deletions(-)
> 

Release-Acked-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>

Thanks.

~ Oleksii