On Wed, Dec 11, 2024 at 03:27:38PM -0800, Kalesh Singh wrote:

Hi all,

This is v2 othe the arch_mmap_hint() series.

Changes in v2:
  - MAP_FIXED case is also handled in arch_mmap_hint() since this is just a
    special case of the hint addr being "enforced", per Yang Shi.
  - Consolidate most of the error handling in arch_mmap_hint().
  - Patch 16 ("mm: Fallback to generic_mmap_hint()") was folded into
    Patch 2 ("mm: x86: Introduce arch_mmap_hint()")

v1: https://lore.kernel.org/r/20241210024119.2488608-1-kaleshsingh@google.com/ (local)

=======

This series introduces arch_mmap_hint() to handle allocating VA space
for the hint address.

But why?  You're basically forcing me to read the entire series to
figure out what you're doing and why.  I decline.

Patches 1-16 introduce this new helper and Patch 17 uses it to fix the
issue of mmap hint being ignored in some cases due to THP alignment [1]

[1] https://lore.kernel.org/r/20241118214650.3667577-1-kaleshsingh@google.com/ (local)

Thanks,
Kalesh


Kalesh Singh (16):
  mm: Introduce generic_mmap_hint()
  mm: x86: Introduce arch_mmap_hint()
  mm: arm: Introduce arch_mmap_hint()
  mm: alpha: Introduce arch_mmap_hint()
  mm: arc: Use generic_mmap_hint()
  mm: csky: Introduce arch_mmap_hint()
  mm: loongarch: Introduce arch_mmap_hint()
  mm: mips: Introduce arch_align_mmap_hint()
  mm: parisc: Introduce arch_align_mmap_hint()
  mm: s390: Use generic_mmap_hint()
  mm: sh: Introduce arch_mmap_hint()
  mm: sparc32: Introduce arch_mmap_hint()
  mm: sparc64: Introduce arch_mmap_hint()
  mm: xtensa: Introduce arch_mmap_hint()
  mm: powerpc: Introduce arch_mmap_hint()
  mm: Respect mmap hint before THP alignment if allocation is possible

 arch/alpha/include/asm/pgtable.h           |   1 +
 arch/alpha/kernel/osf_sys.c                |  31 +++---
 arch/arc/include/asm/pgtable.h             |   1 +
 arch/arc/mm/mmap.c                         |  43 +++++----
 arch/arm/include/asm/pgtable.h             |   1 +
 arch/arm/mm/mmap.c                         | 107 +++++++++------------
 arch/csky/abiv1/inc/abi/pgtable-bits.h     |   1 +
 arch/csky/abiv1/mmap.c                     |  68 +++++++------
 arch/loongarch/include/asm/pgtable.h       |   1 +
 arch/loongarch/mm/mmap.c                   |  49 +++++-----
 arch/mips/include/asm/pgtable.h            |   1 +
 arch/mips/mm/mmap.c                        |  50 +++++-----
 arch/parisc/include/asm/pgtable.h          |   1 +
 arch/parisc/kernel/sys_parisc.c            |  53 +++++-----
 arch/powerpc/include/asm/book3s/64/slice.h |   1 +
 arch/powerpc/mm/book3s64/slice.c           |  31 ++++++
 arch/s390/include/asm/pgtable.h            |   1 +
 arch/s390/mm/mmap.c                        |  51 +++++-----
 arch/sh/include/asm/pgtable.h              |   1 +
 arch/sh/mm/mmap.c                          |  83 ++++++----------
 arch/sparc/include/asm/pgtable_32.h        |   1 +
 arch/sparc/include/asm/pgtable_64.h        |   1 +
 arch/sparc/kernel/sys_sparc_32.c           |  33 ++++---
 arch/sparc/kernel/sys_sparc_64.c           |  96 +++++++-----------
 arch/x86/include/asm/pgtable_64.h          |   1 +
 arch/x86/kernel/sys_x86_64.c               |  64 ++++++------
 arch/xtensa/kernel/syscall.c               |  31 ++++--
 include/linux/sched/mm.h                   |   9 ++
 mm/huge_memory.c                           |  17 ++--
 mm/mmap.c                                  |  86 +++++++++++------
 30 files changed, 491 insertions(+), 424 deletions(-)

-- 
2.47.0.338.g60cca15819-goog