Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page

[PATCH v2 00/12] mm: free retracted page table by RCU · Hugh Dickins <hughd@google.com> · 2023-06-20
[PATCH v2 01/12] mm/pgtable: add rcu_read_lock() and rcu_read_unlock()s · Hugh Dickins <hughd@google.com> · 2023-06-20
[PATCH v2 02/12] mm/pgtable: add PAE safety to __pte_offset_map() · Hugh Dickins <hughd@google.com> · 2023-06-20
[PATCH v2 03/12] arm: adjust_pte() use pte_offset_map_nolock() · Hugh Dickins <hughd@google.com> · 2023-06-20
[PATCH v2 04/12] powerpc: assert_pte_locked() use pte_offset_map_nolock() · Hugh Dickins <hughd@google.com> · 2023-06-20
[PATCH v2 05/12] powerpc: add pte_free_defer() for pgtables sharing page · Hugh Dickins <hughd@google.com> · 2023-06-20
Re: [PATCH v2 05/12] powerpc: add pte_free_defer() for pgtables sharing page · Jason Gunthorpe <jgg@ziepe.ca> · 2023-06-20
Re: [PATCH v2 05/12] powerpc: add pte_free_defer() for pgtables sharing page · Hugh Dickins <hughd@google.com> · 2023-06-20
Re: [PATCH v2 05/12] powerpc: add pte_free_defer() for pgtables sharing page · Jason Gunthorpe <jgg@ziepe.ca> · 2023-06-20
Re: [PATCH v2 05/12] powerpc: add pte_free_defer() for pgtables sharing page · Hugh Dickins <hughd@google.com> · 2023-06-22
Re: [PATCH v2 05/12] powerpc: add pte_free_defer() for pgtables sharing page · Jason Gunthorpe <jgg@ziepe.ca> · 2023-06-27
Re: [PATCH v2 05/12] powerpc: add pte_free_defer() for pgtables sharing page · Hugh Dickins <hughd@google.com> · 2023-06-27
[PATCH v2 06/12] sparc: add pte_free_defer() for pte_t *pgtable_t · Hugh Dickins <hughd@google.com> · 2023-06-20
[PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Hugh Dickins <hughd@google.com> · 2023-06-20
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Gerald Schaefer <gerald.schaefer@linux.ibm.com> · 2023-06-28
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Hugh Dickins <hughd@google.com> · 2023-06-29
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Jason Gunthorpe <jgg@ziepe.ca> · 2023-06-29
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Gerald Schaefer <gerald.schaefer@linux.ibm.com> · 2023-06-29
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Hugh Dickins <hughd@google.com> · 2023-06-30
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Hugh Dickins <hughd@google.com> · 2023-07-02
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Alexander Gordeev <agordeev@linux.ibm.com> · 2023-07-04
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Hugh Dickins <hughd@google.com> · 2023-07-04
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Gerald Schaefer <gerald.schaefer@linux.ibm.com> · 2023-07-04
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Hugh Dickins <hughd@google.com> · 2023-07-04
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Gerald Schaefer <gerald.schaefer@linux.ibm.com> · 2023-07-05
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Hugh Dickins <hughd@google.com> · 2023-07-06
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Gerald Schaefer <gerald.schaefer@linux.ibm.com> · 2023-07-06
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Hugh Dickins <hughd@google.com> · 2023-07-06
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Jason Gunthorpe <jgg@ziepe.ca> · 2023-07-10
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Alexander Gordeev <agordeev@linux.ibm.com> · 2023-07-05
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Hugh Dickins <hughd@google.com> · 2023-07-06
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Gerald Schaefer <gerald.schaefer@linux.ibm.com> · 2023-07-07
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Gerald Schaefer <gerald.schaefer@linux.ibm.com> · 2023-07-03
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Alexander Gordeev <agordeev@linux.ibm.com> · 2023-06-29
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Gerald Schaefer <gerald.schaefer@linux.ibm.com> · 2023-06-29
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Claudio Imbrenda <imbrenda@linux.ibm.com> · 2023-06-30
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Hugh Dickins <hughd@google.com> · 2023-06-30
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Claudio Imbrenda <imbrenda@linux.ibm.com> · 2023-06-30
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Hugh Dickins <hughd@google.com> · 2023-06-30
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Claudio Imbrenda <imbrenda@linux.ibm.com> · 2023-07-03
Re: [PATCH v2 07/12] s390: add pte_free_defer() for pgtables sharing page · Jason Gunthorpe <jgg@ziepe.ca> · 2023-07-03
[PATCH v2 08/12] mm/pgtable: add pte_free_defer() for pgtable as page · Hugh Dickins <hughd@google.com> · 2023-06-20
[PATCH v2 09/12] mm/khugepaged: retract_page_tables() without mmap or vma lock · Hugh Dickins <hughd@google.com> · 2023-06-20
[PATCH v2 10/12] mm/khugepaged: collapse_pte_mapped_thp() with mmap_read_lock() · Hugh Dickins <hughd@google.com> · 2023-06-20
[PATCH mm 10/12] mm/khugepaged: collapse_pte_mapped_thp() with mmap_read_lock() · Hugh Dickins <hughd@google.com> · 2023-06-20
[PATCH v2 11/12] mm/khugepaged: delete khugepaged_collapse_pte_mapped_thps() · Hugh Dickins <hughd@google.com> · 2023-06-20
[PATCH v2 12/12] mm: delete mmap_write_trylock() and vma_try_start_write() · Hugh Dickins <hughd@google.com> · 2023-06-20

From: Jason Gunthorpe <jgg@ziepe.ca>
Date: 2023-07-03 21:29:43
Also in: linux-mm, linux-s390, lkml, sparclinux

On Mon, Jul 03, 2023 at 01:00:13PM +0200, Claudio Imbrenda wrote:

On Fri, 30 Jun 2023 12:22:43 -0700 (PDT)
Hugh Dickins [off-list ref] wrote:

[...]

quoted

That's something I would have expected to be handled already via
mmu_notifiers, rather than buried inside the page table freeing.

If s390 is the only architecture to go that way, and could instead do
it via mmu_notifiers, then I think that will be more easily supported
in the long term.

I am very well aware of that, and in fact I've been working on
exactly that for some time already. But it's a very complex minefield
and therefore I'm proceeding *very* carefully. It will take quite some
time before anything comes out.

Yes +1 on this please, creating your own arch cross connect with kvm
in the page table freers is really horrible..

Jason

`h`	back out one level
`j`	next message in thread
`k`	previous message in thread
`l`	drill in
`Esc`	close help / fold thread tree
`?`	toggle this help