Le 15/06/2020 à 05:37, Anshuman Khandual a écrit :
This adds new tests validating for these following arch advanced page table
helpers. These tests create and test specific mapping types at various page
table levels.
1. pxxp_set_wrprotect()
2. pxxp_get_and_clear()
3. pxxp_set_access_flags()
4.
Le 15/06/2020 à 05:37, Anshuman Khandual a écrit :
This adds new tests validating for these following arch advanced page table
helpers. These tests create and test specific mapping types at various page
table levels.
1. pxxp_set_wrprotect()
2. pxxp_get_and_clear()
3. pxxp_set_access_flags()
4.
Le 24/06/2020 à 05:13, Anshuman Khandual a écrit :
On 06/15/2020 09:07 AM, Anshuman Khandual wrote:
This series adds some more arch page table helper validation tests which
are related to core and advanced memory functions. This also creates a
documentation, enlisting expected semantics for
From: Mike Rapoport
Hi,
Most architectures have very similar versions of pXd_alloc_one() and
pXd_free_one() for intermediate levels of page table.
These patches add generic versions of these functions in
and enable use of the generic functions where
appropriate.
In addition, functions declare
From: Mike Rapoport
Replace pte_alloc_one(), pte_free() and pte_free_kernel() with the generic
implementation. The only actual functional change is the addition of
__GFP_ACCOUT for the allocation of the user page tables.
The pte_alloc_one_kernel() is kept back because its implementation on
openr
From: Mike Rapoport
In the most cases header is required only for allocations
of page table memory. Most of the .c files that include that header do not
use symbols declared in and do not require that header.
As for the other header files that used to include , it is
possible to move that incl
From: Mike Rapoport
xtensa clears PTEs during allocation of the page tables and pte_clear()
sets the PTE to a non-zero value. Splitting ptes_clear() helper out of
pte_alloc_one() and pte_alloc_one_kernel() allows reuse of base generic
allocation methods (__pte_alloc_one() and __pte_alloc_one_kern
From: Mike Rapoport
For most architectures that support >2 levels of page tables,
pmd_alloc_one() is a wrapper for __get_free_pages(), sometimes with
__GFP_ZERO and sometimes followed by memset(0) instead.
More elaborate versions on arm64 and x86 account memory for the user page
tables and call
From: Mike Rapoport
Several architectures define pud_alloc_one() as a wrapper for
__get_free_page() and pud_free() as a wrapper for free_page().
Provide a generic implementation in asm-generic/pgalloc.h and use it where
appropriate.
Signed-off-by: Mike Rapoport
---
arch/arm64/include/asm/pgal
From: Mike Rapoport
Most architectures define pgd_free() as a wrapper for free_page().
Provide a generic version in asm-generic/pgalloc.h and enable its use for
most architectures.
Signed-off-by: Mike Rapoport
---
arch/alpha/include/asm/pgalloc.h | 6 --
arch/arm/include/asm/pgalloc.
From: Joerg Roedel
The functions are only used in two source files, both residing in mm/
subdirectory, so there is no need for them to be in the global
header. Move them to the new mm/pgalloc-track.h header and include it only
where needed.
[rppt: mv include/linux/pgalloc-track.h mm/]
Link: h
From: Mike Rapoport
The functionality in lib/ioremap.c deals with pagetables, vmalloc and
caches, so it naturally belongs to mm/
Moving it there will also allow declaring p?d_alloc_track functions in an
header file inside mm/ rather than having those declarations in
include/linux/mm.h
Suggested-
On Sat, Jun 27, 2020 at 05:34:45PM +0300, Mike Rapoport wrote:
> Most architectures have very similar versions of pXd_alloc_one() and
> pXd_free_one() for intermediate levels of page table.
> These patches add generic versions of these functions in
> and enable use of the generic functions where
We account the PTE level of the page tables to the process in order to
make smarter OOM decisions and help diagnose why memory is fragmented.
For these same reasons, we should account pages allocated for PMDs.
With larger process address spaces and ASLR, the number of PMDs in use
is higher than it
On Sat, Jun 27, 2020 at 05:34:49PM +0300, Mike Rapoport wrote:
> More elaborate versions on arm64 and x86 account memory for the user page
> tables and call to pgtable_pmd_page_ctor() as the part of PMD page
> initialization.
>
> Move the arm64 version to include/asm-generic/pgalloc.h and use the
On Sat, Jun 27, 2020 at 05:34:47PM +0300, Mike Rapoport wrote:
> From: Mike Rapoport
>
> Replace pte_alloc_one(), pte_free() and pte_free_kernel() with the generic
> implementation. The only actual functional change is the addition of
> __GFP_ACCOUT for the allocation of the user page tables.
>
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