On 06/01/2025 09:38, Qi Zheng wrote:
> For this series:
>
> Acked-by: Qi Zheng
Thank you for the review, appreciated!
- Kevin
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page table pages.
This patch should cover all architectures and all configurations
where PGDs are one or more regular pages. This excludes any
configuration where PGDs are allocated from a kmem_cache object.
Acked-by: Dave Hansen
Signed-off-by: Kevin Brodsky
---
arch/m68k/include/asm/mcf_pgalloc.
s by
using GFP_PGTABLE_{USER,KERNEL} as appropriate.
Not all PGD allocations can be handled by the generic helpers. In
particular, multiple architectures allocate PGDs from a kmem_cache,
and those PGDs may not be page-sized.
Acked-by: Dave Hansen
Signed-off-by: Kevin Brodsky
---
arch/alpha
ansen
Signed-off-by: Kevin Brodsky
---
arch/arm/mm/pgd.c | 14 +++---
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/arch/arm/mm/pgd.c b/arch/arm/mm/pgd.c
index f8e9bc58a84f..2a1077747758 100644
--- a/arch/arm/mm/pgd.c
+++ b/arch/arm/mm/pgd.c
@@ -17,11 +17,11 @@
#include
ating ptable_list for PMD/PGD levels.
Acked-by: Dave Hansen
Signed-off-by: Kevin Brodsky
---
arch/m68k/include/asm/motorola_pgalloc.h | 6 +++---
arch/m68k/mm/motorola.c | 17 -
2 files changed, 15 insertions(+), 8 deletions(-)
diff --git a/arch/m68k/includ
) can handle higher allocation
orders so we don't need to define our own.
These changes ensure that pagetable_pmd_[cd]tor are called,
improving the accounting of page table pages.
Acked-by: Dave Hansen
Signed-off-by: Kevin Brodsky
---
arch/parisc/include/asm/pgalloc.h | 23
pagetable_*_ctor all have the same basic implementation. Move the
common part to a helper to reduce duplication.
Acked-by: Dave Hansen
Signed-off-by: Kevin Brodsky
---
include/linux/mm.h | 28
1 file changed, 12 insertions(+), 16 deletions(-)
diff --git a/include
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---
Kevin Brodsky (6):
mm: Move common part of pagetable_*_ctor to helper
parisc: mm: Ensure pagetable_pmd_[cd]tor are called
m68k: mm: Add calls to pagetable_pmd_[cd]tor
ARM: mm: Rename PGD
+Qi
On 03/01/2025 11:31, Alexandre Ghiti wrote:
> Hi Kevin,
>
> On 19/12/2024 17:44, Kevin Brodsky wrote:
>> {pmd,pud,p4d}_alloc_one() is never called if the corresponding page
>> table level is folded, as {pmd,pud,p4d}_alloc() already does the
>> required check.
On 20/12/2024 20:31, Dave Hansen wrote:
> On 12/20/24 02:58, Kevin Brodsky wrote:
>>> One super tiny nit is that the PAE pgd _can_ be allocated using
>>> __get_free_pages(). It was originally there for Xen, but I think it's
>>> being used for PTI only at this p
On 20/12/2024 15:16, Qi Zheng wrote:
>>>
>>> Did I miss something?
>>>
>>> My patch series is not only for cleanup, but also for fixes of
>>> UAF issue [1], so is it possible to rebase your patch series onto
>>> mine? I can post v3 ASAP.
>>
>> I see, yours should be merged first then. The issue is
On 20/12/2024 12:46, Qi Zheng wrote:
> Hi Kevin,
>
> On 2024/12/20 18:49, Kevin Brodsky wrote:
>> [...]
>>
>> Qi, shall we collaborate to make our series complementary? I believe my
>> series covers patch 2 and 4 of your series, but it goes further by
>> co
On 19/12/2024 18:13, Dave Hansen wrote:
> On 12/19/24 08:44, Kevin Brodsky wrote:
>>
>> +---+-+---+--++
>> | x86 | Y | Y
Hi Peter, Qi,
On 19/12/2024 18:19, Peter Zijlstra wrote:
> On Thu, Dec 19, 2024 at 04:44:16PM +0000, Kevin Brodsky wrote:
>> Besides the ptlock management at PTE/PMD level, all the
>> pagetable_*_[cd]tor have the same implementation. Introduce common
>> helpers for all
page table pages.
This patch should cover all architectures and all configurations
where PGDs are one or more regular pages. This excludes any
configuration where PGDs are allocated from a kmem_cache object.
Signed-off-by: Kevin Brodsky
---
arch/m68k/include/asm/mcf_pgalloc.h | 2 ++
arch/m6
) can handle higher allocation
orders so we don't need to define our own.
These changes ensure that pagetable_pmd_[cd]tor are called,
improving the accounting of page table pages.
Signed-off-by: Kevin Brodsky
---
arch/parisc/include/asm/pgalloc.h | 23 ---
1 file c
o the ctor/dtor helpers in pud_alloc_one/pud_free
to match the other architectures.
Signed-off-by: Kevin Brodsky
---
arch/s390/include/asm/pgalloc.h | 13 +
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/arch/s390/include/asm/pgalloc.h b/arch/s390/include/asm/pgalloc.h
ind
PGD pages by
using GFP_PGTABLE_{USER,KERNEL} as appropriate.
Not all PGD allocations can be handled by the generic helpers. In
particular, multiple architectures allocate PGDs from a kmem_cache,
and those PGDs may not be page-sized.
Signed-off-by: Kevin Brodsky
---
arch/alpha
Generic implementations of __pgd_alloc and __pgd_free are about to
be introduced. Rename the macros in arch/arm/mm/pgd.c to avoid
clashes. While we're at it, also pass down the mm as argument to
those helpers, as it will be needed to call the generic
__pgd_{alloc,free}.
Signed-off-by:
alloc/free paths.
Besides the small improvement in accounting accuracy, this also
enables adding construction/destruction hooks in just one generic
place for page tables at P4D level (like lower levels).
Signed-off-by: Kevin Brodsky
---
arch/riscv/include/asm/pgalloc.h | 8 ++--
arch/s390/i
ht as well include this check
in the generic implementation. No runtime check is required in
p4d_alloc_one() as the top-level p4d_alloc() already does the
required check.
Signed-off-by: Kevin Brodsky
---
arch/arm64/include/asm/pgalloc.h | 17
arch/riscv/include/asm/pgalloc.h
remove it altogether.
This is consistent with the way arm64 and x86 handle this situation
(runtime check in p4d_free() only).
Signed-off-by: Kevin Brodsky
---
arch/riscv/include/asm/pgalloc.h | 22 --
1 file changed, 4 insertions(+), 18 deletions(-)
diff --git a/arch/riscv
ating ptable_list for PMD/PGD levels.
Signed-off-by: Kevin Brodsky
---
arch/m68k/include/asm/motorola_pgalloc.h | 6 +++---
arch/m68k/mm/motorola.c | 25 +++-
2 files changed, 23 insertions(+), 8 deletions(-)
diff --git a/arch/m68k/include/asm/motorola_pgal
Besides the ptlock management at PTE/PMD level, all the
pagetable_*_[cd]tor have the same implementation. Introduce common
helpers for all levels to reduce the duplication.
Signed-off-by: Kevin Brodsky
---
include/linux/mm.h | 46 ++
1 file changed
nel.org
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---
Kevin Brodsky (10):
mm: Move common parts of pagetable_*_[cd]tor to helpers
parisc:
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