Merge branch 'barry/2026-01-31/improve-dmactive' into 'main'

Split dmActive into separate support for matrix, rhs, and initial guess

See merge request petsc/petsc!8990

Split dmActive into seperate support for matrix, rhs, and initial guess

Merge branch 'barry/2026-02-22/cleanup-flexible-KSP-docs' into 'main'

Manual page improvements and deprecations for flexible KSP types

See merge request petsc/petsc!9066

Merge branch 'balay/mumps-uni' into 'main'

MUMPS: remove -with-mumps-serial option and rely on --with-mpi=0

See merge request petsc/petsc!9070

MUMPS: remove -with-mumps-serial option and rely on --with-mpi=0

Cleanup of manual pages for flexible KSP methods deprecation of type specific functions

Co-authored-by: Pierre Jolivet <pierre@joliv.et>

Merge branch 'jczhang/2026-01-29/hypre-umpire-pool-size' into 'main'

Add option -hypre_umpire_device_pool_size <size in MiB>

See merge request petsc/petsc!8984

HYPRE: add option -hypre_umpire_device_pool_size <size in MiB>

When hypre is configured with Umpire (recommended by hypre), the default Umpire pool size on device is set
to 4 GB per process by hypre

HYPRE: add option -hypre_umpire_device_pool_size <size in MiB>

When hypre is configured with Umpire (recommended by hypre), the default Umpire pool size on device is set
to 4 GB per process by hypre which could lead to out-of-memory when one maps multiple MPI processes to one GPU.

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Merge branch 'jrwrigh/cgns_bc_writing' into 'main'

Plex: CGNS files write and read boundary conditions and face label information

See merge request petsc/petsc!8934

fix(dm): CreateFromCellListParallel allocates verticesAdj for the user

Under normal circumstances, the user will not know the number of unique
vertices in the element connectivity

feat(dmlabel): Add DMLabelGetValueISGlobal()

feat(bt): Add PetscBTCountSet()

Merge branch 'jolivet/deprecate-matmatmult_Bbn' into 'main'

Deprecate -matmatmult_Bbn in favor of -matproduct_batch_size

See merge request petsc/petsc!8993

Deprecate -matmatmult_Bbn in favor of -matproduct_batch_size

See also -ksp_matsolve_batch_size

Merge branch 'jrwrigh/petscsection_distribute_data' into 'main'

feat: Add PetscSectionMigrateData()

See merge request petsc/petsc!8963

feat(section): Add PetscSectionDistributeData()

This is a copy/paste of `DMPlexDistributeData()`, but brought up to the
PetscSection interface because the routine is completely generic

Co-authored-

feat(section): Add PetscSectionDistributeData()

This is a copy/paste of `DMPlexDistributeData()`, but brought up to the
PetscSection interface because the routine is completely generic

Co-authored-by: Barry Smith <bsmith@mcs.anl.gov>

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Merge branch 'barry/2026-01-13/ftn-generation-for-context-functions' into 'main'

Fortran generation of interface definitions for functions that take and return context variables (void *ctx and PetC

Merge branch 'barry/2026-01-13/ftn-generation-for-context-functions' into 'main'

Fortran generation of interface definitions for functions that take and return context variables (void *ctx and PetCtx ctx)

See merge request petsc/petsc!8956

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Add automatic generated fortran support for setting and returning contexts

Major cleanup of the code for setting and returning application (previously called user) contexts
- PetscCtx ctx is now t

Add automatic generated fortran support for setting and returning contexts

Major cleanup of the code for setting and returning application (previously called user) contexts
- PetscCtx ctx is now the standard for passing in contexts
- PetscCtxRt ctx is the standard for passing out contexts, including context destroy routines based on PetscCtxDestroyFn

Both of these are typedef to void*

Also removed most use of user and userctx for context arguments now consistently named ctx

Improved documentation on PetscCtx and PetscCtxRt and on how to use contexts (including getting them) from Fortran

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Merge branch 'barry/2026-01-03/use-shellcheck-on-shellscripts' into 'main'

add make shellcheck

See merge request petsc/petsc!8933

Change script name to $PETSC_DIR/lib/petsc/bin/petscfreesharedmemory.sh

from $PETSC_DIR/lib/petsc/bin/petscfreesharedmemory

This is part of the process of better organizing the shell script usage
i

Change script name to $PETSC_DIR/lib/petsc/bin/petscfreesharedmemory.sh

from $PETSC_DIR/lib/petsc/bin/petscfreesharedmemory

This is part of the process of better organizing the shell script usage
in PETSc. Since this functionality is not commonly used it is ok to just change

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Merge branch 'fix_1367' into 'main'

`petsc4py` stubs

Closes #1822 and #1367

See merge request petsc/petsc!8366

Add petsc4py stubs to changelog

Merge branch 'adams/dmplex-letkf-loc-gemini' into 'main'

DMPlex: compute localization weight matrix for LETKF

See merge request petsc/petsc!8941

DMPlex: Add DMPlexGetLETKFLocalizationMatrix() to compute localization weight matrix for LETKF

Use Kokkos to create a localization matrix for the LETKF data assimilation method

Tools: Use Gemini Co

DMPlex: Add DMPlexGetLETKFLocalizationMatrix() to compute localization weight matrix for LETKF

Use Kokkos to create a localization matrix for the LETKF data assimilation method

Tools: Use Gemini Code Assist

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Merge branch 'fix-options-left' into 'main'

Fixes doc and behaviour of an unset -options_left value as reported in #1834.

Closes #1834

See merge request petsc/petsc!8905