On 17.02.25 20:08, Matthew Wilcox (Oracle) wrote:
Removes a cast from folio to page in four callers of mk_pte().
Signed-off-by: Matthew Wilcox (Oracle)
---
Yes, that looks good
Acked-by: David Hildenbrand
--
Cheers,
David / dhildenb
page *page, pgprot_t pgprot)
{
return pfn_pte(page_to_pfn(page), pgprot);
}
#endif
-#endif
/**
* folio_maybe_dma_pinned - Report if a folio may be pinned for DMA.
Acked-by: David Hildenbrand
--
Cheers,
David / dhildenb
)
---
Acked-by: David Hildenbrand
--
Cheers,
David / dhildenb
= maybe_mkwrite(pte_mkdirty(entry), vma);
+ else if (pte_write(entry) && folio_test_dirty(folio))
+ entry = pte_mkdirty(entry);
if (unlikely(vmf_orig_pte_uffd_wp(vmf)))
entry = pte_mkuffd_wp(entry);
/* copy-on-write page */
Yes, that loo
On 17.02.25 20:08, Matthew Wilcox (Oracle) wrote:
The intent is to add folio_mk_pte() to remove the conversion from folio
to page necessary to call mk_pte(). Eventually we might end up removing
mk_pte(), but that's not what's being proposed today.
I didn't want to add folio_mk_pte() to each arc
On 02.09.24 17:26, Omar Sandoval wrote:
On Mon, Sep 02, 2024 at 10:56:27AM +0200, David Hildenbrand wrote:
On 02.09.24 08:31, Omar Sandoval wrote:
On Mon, Sep 02, 2024 at 08:19:33AM +0200, Christophe Leroy wrote:
Le 02/09/2024 à 07:31, Omar Sandoval a écrit :
[Vous ne recevez pas souvent
On 02.09.24 08:31, Omar Sandoval wrote:
On Mon, Sep 02, 2024 at 08:19:33AM +0200, Christophe Leroy wrote:
Le 02/09/2024 à 07:31, Omar Sandoval a écrit :
[Vous ne recevez pas souvent de courriers de osan...@osandov.com. Découvrez
pourquoi ceci est important à https://aka.ms/LearnAboutSenderId
what the API was supposed to do
in the 1st place. Compatibility with buggy hypervisors
is handled inside virtio-balloon, which is the only driver
making use of this facility, so far.
Signed-off-by: Michael S. Tsirkin
---
Reviewed-by: David Hildenbrand
--
Cheers,
David / dhildenb
to rely on totalram_pages().
Signed-off-by: Wei Yang
CC: Jason Lunz
CC: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Cc: Alasdair G Kergon
Cc: Jens Axboe
CC: Andrew Morton
CC: Mike Rapoport (IBM)
CC: David Hildenbrand
---
A simple UML bootup test looks good.
---
arch/um/kernel/m
purposes.
Assuming I didn't miss a functional change
Acked-by: David Hildenbrand
--
Cheers,
David / dhildenb
On 25.03.24 07:08, Xuan Zhuo wrote:
On Fri, 22 Mar 2024 22:02:27 +0100, David Hildenbrand wrote:
On 22.03.24 20:16, Daniel Verkamp wrote:
On Thu, Mar 21, 2024 at 3:16 AM Xuan Zhuo wrote:
Currently, the init_vqs function within the virtio_balloon driver relies
on the condition that certain
On 22.03.24 20:16, Daniel Verkamp wrote:
On Thu, Mar 21, 2024 at 3:16 AM Xuan Zhuo wrote:
Currently, the init_vqs function within the virtio_balloon driver relies
on the condition that certain names array entries are null in order to
skip the initialization of some virtual queues (vqs). This b
On 21.03.24 11:15, Xuan Zhuo wrote:
Currently, the init_vqs function within the virtio_balloon driver relies
on the condition that certain names array entries are null in order to
skip the initialization of some virtual queues (vqs). This behavior is
unique to this part of the codebase. In an upc
On 27.06.23 22:13, Hugh Dickins wrote:
On Tue, 27 Jun 2023, David Hildenbrand wrote:
On 27.06.23 06:44, Hugh Dickins wrote:
On Mon, 26 Jun 2023, Vishal Moola (Oracle) wrote:
The MM subsystem is trying to shrink struct page. This patchset
introduces a memory descriptor for page table tracking
On 27.06.23 06:44, Hugh Dickins wrote:
On Mon, 26 Jun 2023, Vishal Moola (Oracle) wrote:
The MM subsystem is trying to shrink struct page. This patchset
introduces a memory descriptor for page table tracking - struct ptdesc.
...
39 files changed, 686 insertions(+), 455 deletions(-)
I don'
the creation of a special type of
writable memory (shadow stack) that is only writable in limited specific
ways. Previously, changes were proposed to core MM code to teach it to
decide when to create normally writable memory or the special shadow stack
writable memory, but David Hildenbrand suggested
On 18.04.23 23:33, Vishal Moola wrote:
On Tue, Apr 18, 2023 at 8:45 AM David Hildenbrand wrote:
On 17.04.23 22:50, Vishal Moola (Oracle) wrote:
s390 uses page->index to keep track of page tables for the guest address
space. In an attempt to consolidate the usage of page fields in s
On 17.04.23 22:50, Vishal Moola (Oracle) wrote:
s390 uses page->index to keep track of page tables for the guest address
space. In an attempt to consolidate the usage of page fields in s390,
replace _pt_pad_2 with _pt_s390_gaddr to replace page->index in gmap.
This will help with the splitting o
On 01.03.23 08:03, Christophe Leroy wrote:
Le 27/02/2023 à 23:29, Rick Edgecombe a écrit :
The x86 Control-flow Enforcement Technology (CET) feature includes a new
type of memory called shadow stack. This shadow stack memory has some
unusual properties, which requires some core mm changes to f
On 28.02.23 16:50, Palmer Dabbelt wrote:
On Fri, 13 Jan 2023 09:10:19 PST (-0800), da...@redhat.com wrote:
Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by stealing one bit
from the offset. This reduces the maximum swap space per file: on 32bit
to 16 GiB (was 32 GiB).
Seems fine to me, I doubt a
On 27.02.23 20:46, Geert Uytterhoeven wrote:
Hi David,
On Mon, Feb 27, 2023 at 6:01 PM David Hildenbrand wrote:
/*
* Externally used page protection values.
diff --git a/arch/microblaze/include/asm/pgtable.h
b/arch/microblaze/include/asm/pgtable.h
index 42f5988e998b..7e3de54bf426
/*
* Externally used page protection values.
diff --git a/arch/microblaze/include/asm/pgtable.h
b/arch/microblaze/include/asm/pgtable.h
index 42f5988e998b..7e3de54bf426 100644
--- a/arch/microblaze/include/asm/pgtable.h
+++ b/arch/microblaze/include/asm/pgtable.h
@@ -131,10 +131,10 @@ exte
On 26.02.23 21:13, Geert Uytterhoeven wrote:
Hi David,
Hi Geert,
On Fri, Jan 13, 2023 at 6:16 PM David Hildenbrand wrote:
Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by stealing one bit
from the type. Generic MM currently only uses 5 bits for the type
(MAX_SWAPFILES_SHIFT), so the s
nux-s...@vger.kernel.org
Cc: linux...@vger.kernel.org
Cc: sparcli...@vger.kernel.org
Cc: linux-um@lists.infradead.org
Cc: xen-de...@lists.xenproject.org
Cc: linux-a...@vger.kernel.org
Cc: linux...@kvack.org
Tested-by: Pengfei Xu
Suggested-by: David Hildenbrand
Signed-off-by: Rick Edgecombe
---
Hi Non-x86 A
On 07.02.23 01:32, Mark Brown wrote:
On Fri, Jan 13, 2023 at 06:10:04PM +0100, David Hildenbrand wrote:
Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by stealing one bit from the
offset. This reduces the maximum swap space per file to 64 GiB (was 128
GiB).
While at it drop the PTE_TYPE_
off-by: Mike Rapoport (IBM)
Reviewed-by: David Hildenbrand
--
Thanks,
David / dhildenb
___
linux-um mailing list
linux-um@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-um
ntation of pfn_valid() and drop its per-architecture definitions.
Signed-off-by: Mike Rapoport (IBM)
Acked-by: Arnd Bergmann
Acked-by: Guo Ren # csky
Acked-by: Huacai Chen # LoongArch
Acked-by: Stafford Horne# OpenRISC
---
LGTM with the fixup
Reviewed-by: David H
h and
drop redundant definitions.
Signed-off-by: Mike Rapoport (IBM)
Reviewed-by: Geert Uytterhoeven
Acked-by: Geert Uytterhoeven
---
Reviewed-by: David Hildenbrand
--
Thanks,
David / dhildenb
___
linux-um mailing list
linux-um@lists.infradea
Reviewed-by: David Hildenbrand
--
Thanks,
David / dhildenb
___
linux-um mailing list
linux-um@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-um
On 13.01.23 18:10, David Hildenbrand wrote:
We want to implement __HAVE_ARCH_PTE_SWP_EXCLUSIVE on all architectures.
Let's extend our sanity checks, especially testing that our PTE bit
does not affect:
* is_swap_pte() -> pte_present() and pte_none()
* the swap entry + type
* pte_swp_so
cannot
be used, and reusing it avoids having to steal one bit from the swap
offset.
While at it, mask the type in __swp_entry().
Cc: Michael Ellerman
Cc: Nicholas Piggin
Cc: Christophe Leroy
Signed-off-by: David Hildenbrand
---
arch/powerpc/include/asm/book3s/32/pgtable.h | 38 +
k 1100 and 1110 now identify swap PTEs.
While at it, remove SWP_TYPE_BITS (not really helpful as it's not used in
the actual swap macros) and mask the type in __swp_entry().
Cc: Chris Zankel
Cc: Max Filippov
Signed-off-by: David Hildenbrand
---
arch/xtensa/include/asm
le at it, mask the type in __swp_entry(); use some helper definitions
to make the macros easier to grasp.
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: Borislav Petkov
Cc: Dave Hansen
Cc: "H. Peter Anvin"
Signed-off-by: David Hildenbrand
---
arch/x86/include/asm/pgtabl
__HAVE_ARCH_PTE_SWP_EXCLUSIVE is now supported by all architectures that
support swp PTEs, so let's drop it.
Signed-off-by: David Hildenbrand
---
arch/alpha/include/asm/pgtable.h | 1 -
arch/arc/include/asm/pgtable-bits-arcv2.h| 1 -
arch/arm/include/asm/pgta
k the type in __swp_entry().
Cc: Richard Weinberger
Cc: Anton Ivanov
Cc: Johannes Berg
Signed-off-by: David Hildenbrand
---
arch/um/include/asm/pgtable.h | 37 +--
1 file changed, 35 insertions(+), 2 deletions(-)
diff --git a/arch/um/include/asm/pgtable.h b/ar
Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by stealing one bit
from the type. Generic MM currently only uses 5 bits for the type
(MAX_SWAPFILES_SHIFT), so the stolen bit was effectively unused.
While at it, mask the type in __swp_entry().
Cc: "David S. Miller"
Signed-off-by: Da
archs. Note that the old documentation was
wrong: we use 20 bit for the offset and the reserved bits were 8 instead
of 7 bits in the ascii art.
Cc: "David S. Miller"
Signed-off-by: David Hildenbrand
---
arch/sparc/include/asm/pgtable_32.h | 27 ++-
arch/sp
While at it, mask the type in __swp_entry().
Cc: Yoshinori Sato
Cc: Rich Felker
Signed-off-by: David Hildenbrand
---
arch/sh/include/asm/pgtable_32.h | 54 +---
1 file changed, 42 insertions(+), 12 deletions(-)
diff --git a/arch/sh/include/asm/pgtable_32.h b/arch/
pe in __swp_entry().
Cc: Paul Walmsley
Cc: Palmer Dabbelt
Cc: Albert Ou
Signed-off-by: David Hildenbrand
---
arch/riscv/include/asm/pgtable-bits.h | 3 +++
arch/riscv/include/asm/pgtable.h | 29 ++-
2 files changed, 27 insertions(+), 5 deletions(-)
diff --git a/arch/
Signed-off-by: David Hildenbrand
---
arch/powerpc/include/asm/nohash/32/pgtable.h | 22 +
arch/powerpc/include/asm/nohash/32/pte-40x.h | 6 ++---
arch/powerpc/include/asm/nohash/32/pte-44x.h | 18 --
arch/powerpc/include/asm/nohash/32/pte-85xx.h | 4 ++--
arch/powe
bit avoids having to steal one bit from the swap offset.
Cc: "James E.J. Bottomley"
Cc: Helge Deller
Signed-off-by: David Hildenbrand
---
arch/parisc/include/asm/pgtable.h | 41 ---
1 file changed, 38 insertions(+), 3 deletions(-)
diff --git a/arch/parisc/i
d-off-by: David Hildenbrand
---
arch/openrisc/include/asm/pgtable.h | 41 +
1 file changed, 36 insertions(+), 5 deletions(-)
diff --git a/arch/openrisc/include/asm/pgtable.h
b/arch/openrisc/include/asm/pgtable.h
index 6477c17b3062..903b32d662ab 100644
--- a/arch/ope
Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by using the yet-unused bit
31.
Cc: Thomas Bogendoerfer
Signed-off-by: David Hildenbrand
---
arch/nios2/include/asm/pgtable-bits.h | 3 +++
arch/nios2/include/asm/pgtable.h | 22 +-
2 files changed, 24 insertions(
ts for the swap type and document the layout.
Bits 26--31 should get ignored by hardware completely, so they can be
used.
Cc: Dinh Nguyen
Signed-off-by: David Hildenbrand
---
arch/nios2/include/asm/pgtable.h | 18 ++
1 file changed, 10 insertions(+), 8 deletions(-)
diff --git a/
confusing, document it a bit better.
While at it, mask the type in __swp_entry()/mk_swap_pte().
Cc: Thomas Bogendoerfer
Signed-off-by: David Hildenbrand
---
arch/mips/include/asm/pgtable-32.h | 88 ++
arch/mips/include/asm/pgtable-64.h | 23 ++--
arch/mips/include/asm
out a little bit harder to decipher.
While at it, drop the comment from paulus---copy-and-paste leftover
from powerpc where we actually have _PAGE_HASHPTE---and mask the type in
__swp_entry_to_pte() as well.
Cc: Michal Simek
Signed-off-by: David Hildenbrand
---
arch/m68k/include/asm/mcf_pgtable.h
The definitions are not required, let's remove them.
Cc: Geert Uytterhoeven
Cc: Greg Ungerer
Signed-off-by: David Hildenbrand
---
arch/m68k/include/asm/pgtable_no.h | 6 --
1 file changed, 6 deletions(-)
diff --git a/arch/m68k/include/asm/pgtable_no.h
b/arch/m68k/includ
mask the type in __swp_entry().
Cc: Geert Uytterhoeven
Cc: Greg Ungerer
Signed-off-by: David Hildenbrand
---
arch/m68k/include/asm/mcf_pgtable.h | 36 --
arch/m68k/include/asm/motorola_pgtable.h | 38 +--
arch/m68k/include/asm/sun3_pgtable.h
PMDs and could also be used
in swap PMD context later.
Cc: Huacai Chen
Cc: WANG Xuerui
Signed-off-by: David Hildenbrand
---
arch/loongarch/include/asm/pgtable-bits.h | 4 +++
arch/loongarch/include/asm/pgtable.h | 39 ---
2 files changed, 39 insertions(+), 4 dele
Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by stealing one bit
from the type. Generic MM currently only uses 5 bits for the type
(MAX_SWAPFILES_SHIFT), so the stolen bit is effectively unused.
While at it, also mask the type in __swp_entry().
Signed-off-by: David Hildenbrand
---
arch
Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by stealing one bit from the
offset. This reduces the maximum swap space per file to 16 GiB (was 32
GiB).
While at it, mask the type in __swp_entry().
Cc: Brian Cain
Signed-off-by: David Hildenbrand
---
arch/hexagon/include/asm/pgtable.h
esent(), pte_none() and HW happy. For now, let's keep it simple
because there might be something non-obvious.
Cc: Guo Ren
Signed-off-by: David Hildenbrand
---
arch/csky/abiv1/inc/abi/pgtable-bits.h | 13 +
arch/csky/abiv2/inc/abi/pgtable-bits.h | 19 ---
arch/csky/i
with "Linux PTEs" not "hardware PTEs". Also, properly mask the type in
__swp_entry().
Cc: Russell King
Signed-off-by: David Hildenbrand
---
arch/arm/include/asm/pgtable-2level.h | 3 +++
arch/arm/include/asm/pgtable-3level.h | 3 +++
arch/arm/include/
Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by using bit 5, which is yet
unused. The only important parts seems to be to not use _PAGE_PRESENT
(bit 9).
Cc: Vineet Gupta
Signed-off-by: David Hildenbrand
---
arch/arc/include/asm/pgtable-bits-arcv2.h | 27 ---
1 file ch
y
Cc: Matt Turner
Signed-off-by: David Hildenbrand
---
arch/alpha/include/asm/pgtable.h | 41
1 file changed, 37 insertions(+), 4 deletions(-)
diff --git a/arch/alpha/include/asm/pgtable.h b/arch/alpha/include/asm/pgtable.h
index 9e45f6735d5d..970abf511b13 100644
when the swap PTE layout differs
heavily from ordinary PTEs. Let's properly construct a swap PTE from
swap type+offset.
Signed-off-by: David Hildenbrand
---
mm/debug_vm_pgtable.c | 23 ++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/mm/debug_vm_p
owerpc/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE on 32bit book3s"
-> Fixup swap PTE description
David Hildenbrand (26):
mm/debug_vm_pgtable: more pte_swp_exclusive() sanity checks
alpha/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE
arc/mm: support __HAVE_ARCH_PTE_SWP_E
) didn't call it pte_mksoft_clean().
Grepping for "pte_swp.*soft_dirty" gives you the full picture.
Thanks!
David
Huacai
On Tue, Dec 6, 2022 at 10:48 PM David Hildenbrand wrote:
This is the follow-up on [1]:
[PATCH v2 0/8] mm: COW fixes part 3: reliable GUP R/
On 06.12.22 15:47, David Hildenbrand wrote:
This is the follow-up on [1]:
[PATCH v2 0/8] mm: COW fixes part 3: reliable GUP R/W FOLL_GET of
anonymous pages
After we implemented __HAVE_ARCH_PTE_SWP_EXCLUSIVE on most prominent
enterprise architectures, implement
On 08.12.22 09:52, David Hildenbrand wrote:
On 07.12.22 14:55, Christophe Leroy wrote:
Le 06/12/2022 à 15:47, David Hildenbrand a écrit :
We already implemented support for 64bit book3s in commit bff9beaa2e80
("powerpc/pgtable: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE for book3s&quo
On 07.12.22 14:55, Christophe Leroy wrote:
Le 06/12/2022 à 15:47, David Hildenbrand a écrit :
We already implemented support for 64bit book3s in commit bff9beaa2e80
("powerpc/pgtable: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE for book3s")
Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIV
Supported by all architectures that support swp PTEs, so let's drop it.
Signed-off-by: David Hildenbrand
---
arch/alpha/include/asm/pgtable.h | 1 -
arch/arc/include/asm/pgtable-bits-arcv2.h| 1 -
arch/arm/include/asm/pgtable.h | 1 -
arch/arm64/includ
k 1100 and 1110 now identify swap PTEs.
While at it, remove SWP_TYPE_BITS (not really helpful as it's not used in
the actual swap macros) and mask the type in __swp_entry().
Cc: Chris Zankel
Cc: Max Filippov
Signed-off-by: David Hildenbrand
---
arch/xtensa/include/asm
le at it, mask the type in __swp_entry(); use some helper definitions
to make the macros easier to grasp.
Cc: Thomas Gleixner
Cc: Ingo Molnar
Cc: Borislav Petkov
Cc: Dave Hansen
Cc: "H. Peter Anvin"
Signed-off-by: David Hildenbrand
---
arch/x86/include/asm/pgtabl
k the type in __swp_entry().
Cc: Richard Weinberger
Cc: Anton Ivanov
Cc: Johannes Berg
Signed-off-by: David Hildenbrand
---
arch/um/include/asm/pgtable.h | 37 +--
1 file changed, 35 insertions(+), 2 deletions(-)
diff --git a/arch/um/include/asm/pgtable.h b/ar
Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by stealing one bit
from the type. Generic MM currently only uses 5 bits for the type
(MAX_SWAPFILES_SHIFT), so the stolen bit was effectively unused.
While at it, mask the type in __swp_entry().
Cc: "David S. Miller"
Signed-off-by: Da
archs. Note that the old documentation was
wrong: we use 20 bit for the offset and the reserved bits were 8 instead
of 7 bits in the ascii art.
Cc: "David S. Miller"
Signed-off-by: David Hildenbrand
---
arch/sparc/include/asm/pgtable_32.h | 27 ++-
arch/sp
While at it, mask the type in __swp_entry().
Cc: Yoshinori Sato
Cc: Rich Felker
Signed-off-by: David Hildenbrand
---
arch/sh/include/asm/pgtable_32.h | 54 +---
1 file changed, 42 insertions(+), 12 deletions(-)
diff --git a/arch/sh/include/asm/pgtable_32.h b/arch/
pe in __swp_entry().
Cc: Paul Walmsley
Cc: Palmer Dabbelt
Cc: Albert Ou
Signed-off-by: David Hildenbrand
---
arch/riscv/include/asm/pgtable-bits.h | 3 +++
arch/riscv/include/asm/pgtable.h | 29 ++-
2 files changed, 27 insertions(+), 5 deletions(-)
diff --git a/arch/
cannot
be used, and reusing it avoids having to steal one bit from the swap
offset.
While at it, mask the type in __swp_entry().
Cc: Michael Ellerman
Cc: Nicholas Piggin
Cc: Christophe Leroy
Signed-off-by: David Hildenbrand
---
arch/powerpc/include/asm/book3s/32/pgtable.h | 38 +
Signed-off-by: David Hildenbrand
---
arch/powerpc/include/asm/nohash/32/pgtable.h | 22 +
arch/powerpc/include/asm/nohash/32/pte-40x.h | 6 ++---
arch/powerpc/include/asm/nohash/32/pte-44x.h | 18 --
arch/powerpc/include/asm/nohash/32/pte-85xx.h | 4 ++--
arch/powe
bit avoids having to steal one bit from the swap offset.
Cc: "James E.J. Bottomley"
Cc: Helge Deller
Signed-off-by: David Hildenbrand
---
arch/parisc/include/asm/pgtable.h | 41 ---
1 file changed, 38 insertions(+), 3 deletions(-)
diff --git a/arch/parisc/i
d-off-by: David Hildenbrand
---
arch/openrisc/include/asm/pgtable.h | 41 +
1 file changed, 36 insertions(+), 5 deletions(-)
diff --git a/arch/openrisc/include/asm/pgtable.h
b/arch/openrisc/include/asm/pgtable.h
index 6477c17b3062..903b32d662ab 100644
--- a/arch/ope
Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by using the yet-unused bit
31.
Cc: Thomas Bogendoerfer
Signed-off-by: David Hildenbrand
---
arch/nios2/include/asm/pgtable-bits.h | 3 +++
arch/nios2/include/asm/pgtable.h | 22 +-
2 files changed, 24 insertions(
ts for the swap type and document the layout.
Bits 26--31 should get ignored by hardware completely, so they can be
used.
Cc: Dinh Nguyen
Signed-off-by: David Hildenbrand
---
arch/nios2/include/asm/pgtable.h | 18 ++
1 file changed, 10 insertions(+), 8 deletions(-)
diff --git a/
confusing, document it a bit better.
While at it, mask the type in __swp_entry()/mk_swap_pte().
Cc: Thomas Bogendoerfer
Signed-off-by: David Hildenbrand
---
arch/mips/include/asm/pgtable-32.h | 86 ++
arch/mips/include/asm/pgtable-64.h | 23 ++--
arch/mips/include/asm
out a little bit harder to decipher.
While at it, drop the comment from paulus---copy-and-paste leftover
from powerpc where we actually have _PAGE_HASHPTE---and mask the type in
__swp_entry_to_pte() as well.
Cc: Michal Simek
Signed-off-by: David Hildenbrand
---
arch/m68k/include/asm/mcf_pgtable.h
mask the type in __swp_entry().
Cc: Geert Uytterhoeven
Cc: Greg Ungerer
Signed-off-by: David Hildenbrand
---
arch/m68k/include/asm/mcf_pgtable.h | 36 --
arch/m68k/include/asm/motorola_pgtable.h | 38 +--
arch/m68k/include/asm/sun3_pgtable.h
PMDs and could also be used
in swap PMD context later.
Cc: Huacai Chen
Cc: WANG Xuerui
Signed-off-by: David Hildenbrand
---
arch/loongarch/include/asm/pgtable-bits.h | 4 +++
arch/loongarch/include/asm/pgtable.h | 39 ---
2 files changed, 39 insertions(+), 4 dele
The definitions are not required, let's remove them.
Cc: Geert Uytterhoeven
Cc: Greg Ungerer
Signed-off-by: David Hildenbrand
---
arch/m68k/include/asm/pgtable_no.h | 6 --
1 file changed, 6 deletions(-)
diff --git a/arch/m68k/include/asm/pgtable_no.h
b/arch/m68k/includ
Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by stealing one bit
from the type. Generic MM currently only uses 5 bits for the type
(MAX_SWAPFILES_SHIFT), so the stolen bit is effectively unused.
While at it, also mask the type in __swp_entry().
Signed-off-by: David Hildenbrand
---
arch
Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by stealing one bit from the
offset. This reduces the maximum swap space per file to 16 GiB (was 32
GiB).
While at it, mask the type in __swp_entry().
Cc: Brian Cain
Signed-off-by: David Hildenbrand
---
arch/hexagon/include/asm/pgtable.h
esent(), pte_none() and HW happy. For now, let's keep it simple
because there might be something non-obvious.
Cc: Guo Ren
Signed-off-by: David Hildenbrand
---
arch/csky/abiv1/inc/abi/pgtable-bits.h | 13 +
arch/csky/abiv2/inc/abi/pgtable-bits.h | 19 ---
arch/csky/i
with "Linux PTEs" not "hardware PTEs". Also, properly mask the type in
__swp_entry().
Cc: Russell King
Signed-off-by: David Hildenbrand
---
arch/arm/include/asm/pgtable-2level.h | 3 +++
arch/arm/include/asm/pgtable-3level.h | 3 +++
arch/arm/include/
Let's support __HAVE_ARCH_PTE_SWP_EXCLUSIVE by using bit 5, which is yet
unused. The only important parts seems to be to not use _PAGE_PRESENT
(bit 9).
Cc: Vineet Gupta
Signed-off-by: David Hildenbrand
---
arch/arc/include/asm/pgtable-bits-arcv2.h | 27 ---
1 file ch
only 32bit swap entries. So the
lower 32bit are zero in a swap PTE and we could have taken a bit in
there as well.
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Matt Turner
Signed-off-by: David Hildenbrand
---
arch/alpha/include/asm/pgtable.h | 41
1 file change
when the swap PTE layout differs
heavily from ordinary PTEs. Let's properly construct a swap PTE from
swap type+offset.
Signed-off-by: David Hildenbrand
---
mm/debug_vm_pgtable.c | 23 ++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/mm/debug_vm_p
.com/aarcange/kernel-testcases-for-v5.11/-/blob/main/page_count_do_wp_page-swap.c
[3]
https://gitlab.com/davidhildenbrand/scratchspace/-/blob/main/test_swp_exclusive.c
David Hildenbrand (26):
mm/debug_vm_pgtable: more pte_swp_exclusive() sanity checks
alpha/mm: support __HAVE_ARCH_PTE_SWP_EXCLUSI
On 29.11.22 10:08, Hans Verkuil wrote:
On 29/11/2022 09:48, David Hildenbrand wrote:
On 28.11.22 23:59, Andrew Morton wrote:
On Mon, 28 Nov 2022 09:18:47 +0100 David Hildenbrand wrote:
Less chances of things going wrong that way.
Just mention in the v2 cover letter that the first patch was
On 28.11.22 23:59, Andrew Morton wrote:
On Mon, 28 Nov 2022 09:18:47 +0100 David Hildenbrand wrote:
Less chances of things going wrong that way.
Just mention in the v2 cover letter that the first patch was added to
make it easy to backport that fix without being hampered by merge
conflicts
On 28.11.22 09:17, Hans Verkuil wrote:
Hi David,
On 27/11/2022 11:35, David Hildenbrand wrote:
On 16.11.22 11:26, David Hildenbrand wrote:
FOLL_FORCE is really only for ptrace access. According to commit
707947247e95 ("media: videobuf2-vmalloc: get_userptr: buffers are always
wri
On 16.11.22 11:26, David Hildenbrand wrote:
FOLL_FORCE is really only for ptrace access. According to commit
707947247e95 ("media: videobuf2-vmalloc: get_userptr: buffers are always
writable"), get_vaddr_frames() currently pins all pages writable as a
workaround for issues with read-on
On 16.11.22 19:16, Linus Torvalds wrote:
On Wed, Nov 16, 2022 at 2:30 AM David Hildenbrand wrote:
Let's make it clearer that functionality provided by FOLL_FORCE is
really only for ptrace access.
I'm not super-happy about this one.
I do understand the "let's rename th
Cc: Eric Biederman
Cc: Kees Cook
Cc: Alexander Viro
Cc: Peter Zijlstra
Cc: Arnaldo Carvalho de Melo
Cc: Mark Rutland
Cc: Alexander Shishkin
Cc: Jiri Olsa
Cc: Namhyung Kim
Cc: Mike Kravetz
Cc: Muchun Song
Cc: Kentaro Takeda
Cc: Tetsuo Handa
Cc: Paul Moore
Cc: James Morris
Cc: &
y
Cc: Oded Gabbay
Cc: Arnd Bergmann
Cc: Greg Kroah-Hartman
Signed-off-by: David Hildenbrand
---
drivers/misc/habanalabs/common/memory.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/misc/habanalabs/common/memory.c
b/drivers/misc/habanalabs/common/memory.c
e
Cc: Leon Romanovsky
Signed-off-by: David Hildenbrand
---
drivers/infiniband/hw/qib/qib_user_pages.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/infiniband/hw/qib/qib_user_pages.c
b/drivers/infiniband/hw/qib/qib_user_pages.c
index f4b5f05058e4..f693bc753b6b 100644
Park
Cc: David Airlie
Cc: Daniel Vetter
Cc: Krzysztof Kozlowski
Signed-off-by: David Hildenbrand
---
drivers/gpu/drm/exynos/exynos_drm_g2d.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c
b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
Cc: Marek Szyprowski
Cc: Tomasz Figa
Cc: Marek Szyprowski
Cc: Mauro Carvalho Chehab
Signed-off-by: David Hildenbrand
---
drivers/media/common/videobuf2/frame_vector.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/common/videobuf2/frame_vector.c
b/drive
Most probably, FOLL_FORCE usage is just some legacy leftover.
Cc: Andy Walls
Cc: Mauro Carvalho Chehab
Signed-off-by: David Hildenbrand
---
drivers/media/pci/ivtv/ivtv-udma.c | 2 +-
drivers/media/pci/ivtv/ivtv-yuv.c | 5 ++---
2 files changed, 3 insertions(+), 4 deletions(-)
diff --git a/dr
t. So stop
using FOLL_FORCE, which is really only for ptrace access.
Cc: Daniel Vetter
Cc: Lucas Stach
Cc: Russell King
Cc: Christian Gmeiner
Cc: David Airlie
Signed-off-by: David Hildenbrand
---
drivers/gpu/drm/etnaviv/etnaviv_gem.c | 8 +---
1 file changed, 5 insertions(+), 3 deletions(-)
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