| #
c17ee635 |
| 23-Feb-2026 |
Maxime Ripard <mripard@kernel.org> |
Merge drm/drm-fixes into drm-misc-fixes
7.0-rc1 was just released, let's merge it to kick the new release cycle.
Signed-off-by: Maxime Ripard <mripard@kernel.org>
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Revision tags: v7.0-rc1 |
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| #
eeccf287 |
| 19-Feb-2026 |
Linus Torvalds <torvalds@linux-foundation.org> |
Merge tag 'mm-stable-2026-02-18-19-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull more MM updates from Andrew Morton:
- "mm/vmscan: fix demotion targets checks in reclaim/demot
Merge tag 'mm-stable-2026-02-18-19-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull more MM updates from Andrew Morton:
- "mm/vmscan: fix demotion targets checks in reclaim/demotion" fixes a couple of issues in the demotion code - pages were failed demotion and were finding themselves demoted into disallowed nodes (Bing Jiao)
- "Remove XA_ZERO from error recovery of dup_mmap()" fixes a rare mapledtree race and performs a number of cleanups (Liam Howlett)
- "mm: add bitmap VMA flag helpers and convert all mmap_prepare to use them" implements a lot of cleanups following on from the conversion of the VMA flags into a bitmap (Lorenzo Stoakes)
- "support batch checking of references and unmapping for large folios" implements batching to greatly improve the performance of reclaiming clean file-backed large folios (Baolin Wang)
- "selftests/mm: add memory failure selftests" does as claimed (Miaohe Lin)
* tag 'mm-stable-2026-02-18-19-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (36 commits) mm/page_alloc: clear page->private in free_pages_prepare() selftests/mm: add memory failure dirty pagecache test selftests/mm: add memory failure clean pagecache test selftests/mm: add memory failure anonymous page test mm: rmap: support batched unmapping for file large folios arm64: mm: implement the architecture-specific clear_flush_young_ptes() arm64: mm: support batch clearing of the young flag for large folios arm64: mm: factor out the address and ptep alignment into a new helper mm: rmap: support batched checks of the references for large folios tools/testing/vma: add VMA userland tests for VMA flag functions tools/testing/vma: separate out vma_internal.h into logical headers tools/testing/vma: separate VMA userland tests into separate files mm: make vm_area_desc utilise vma_flags_t only mm: update all remaining mmap_prepare users to use vma_flags_t mm: update shmem_[kernel]_file_*() functions to use vma_flags_t mm: update secretmem to use VMA flags on mmap_prepare mm: update hugetlbfs to use VMA flags on mmap_prepare mm: add basic VMA flag operation helper functions tools: bitmap: add missing bitmap_[subset(), andnot()] mm: add mk_vma_flags() bitmap flag macro helper ...
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Revision tags: v6.19, v6.19-rc8, v6.19-rc7 |
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| #
f615cc92 |
| 22-Jan-2026 |
Lorenzo Stoakes <lorenzo.stoakes@oracle.com> |
tools/testing/vma: add VMA userland tests for VMA flag functions
Now we have the capability to test the new helpers for the bitmap VMA flags in userland, do so.
We also update the Makefile such tha
tools/testing/vma: add VMA userland tests for VMA flag functions
Now we have the capability to test the new helpers for the bitmap VMA flags in userland, do so.
We also update the Makefile such that both VMA (and while we're here) mm_struct flag sizes can be customised on build. We default to 128-bit to enable testing of flags above word size even on 64-bit systems.
We add userland tests to ensure that we do not regress VMA flag behaviour with the introduction when using bitmap VMA flags, nor accidentally introduce unexpected results due to for instance higher bit values not being correctly cleared/set.
As part of this change, make __mk_vma_flags() a custom function so we can handle specifying invalid VMA bits. This is purposeful so we can have the VMA tests work at lower and higher number of VMA flags without having to duplicate code too much.
Link: https://lkml.kernel.org/r/7fe6afe9c8c61e4d3cfc9a2d50a5d24da8528e68.1769097829.git.lorenzo.stoakes@oracle.com Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Barry Song <baohua@kernel.org> Cc: David Hildenbrand <david@kernel.org> Cc: Dev Jain <dev.jain@arm.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Zi Yan <ziy@nvidia.com> Cc: Damien Le Moal <dlemoal@kernel.org> Cc: "Darrick J. Wong" <djwong@kernel.org> Cc: Jarkko Sakkinen <jarkko@kernel.org> Cc: Yury Norov <ynorov@nvidia.com> Cc: Chris Mason <clm@fb.com> Cc: Pedro Falcato <pfalcato@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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| #
a1f0daca |
| 22-Jan-2026 |
Lorenzo Stoakes <lorenzo.stoakes@oracle.com> |
tools/testing/vma: separate out vma_internal.h into logical headers
The vma_internal.h file is becoming entirely unmanageable. It combines duplicated kernel implementation logic that needs to be ke
tools/testing/vma: separate out vma_internal.h into logical headers
The vma_internal.h file is becoming entirely unmanageable. It combines duplicated kernel implementation logic that needs to be kept in-sync with the kernel, stubbed out declarations that we simply ignore for testing purposes and custom logic added to aid testing.
If we separate each of the three things into separate headers it makes things far more manageable, so do so:
* include/stubs.h contains the stubbed declarations, * include/dup.h contains the duplicated kernel declarations, and * include/custom.h contains declarations customised for testing.
[lorenzo.stoakes@oracle.com: avoid a duplicate struct define] Link: https://lkml.kernel.org/r/1e032732-61c3-485c-9aa7-6a09016fefc1@lucifer.local Link: https://lkml.kernel.org/r/dd57baf5b5986cb96a167150ac712cbe804b63ee.1769097829.git.lorenzo.stoakes@oracle.com Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Barry Song <baohua@kernel.org> Cc: David Hildenbrand <david@kernel.org> Cc: Dev Jain <dev.jain@arm.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Zi Yan <ziy@nvidia.com> Cc: Damien Le Moal <dlemoal@kernel.org> Cc: "Darrick J. Wong" <djwong@kernel.org> Cc: Jarkko Sakkinen <jarkko@kernel.org> Cc: Yury Norov <ynorov@nvidia.com> Cc: Chris Mason <clm@fb.com> Cc: Pedro Falcato <pfalcato@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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| #
6aacab30 |
| 22-Jan-2026 |
Lorenzo Stoakes <lorenzo.stoakes@oracle.com> |
tools/testing/vma: separate VMA userland tests into separate files
So far the userland VMA tests have been established as a rough expression of what's been possible.
Adapt it into a more usable for
tools/testing/vma: separate VMA userland tests into separate files
So far the userland VMA tests have been established as a rough expression of what's been possible.
Adapt it into a more usable form by separating out tests and shared helper functions.
Since we test functions that are declared statically in mm/vma.c, we make use of the trick of #include'ing kernel C files directly.
In order for the tests to continue to function, we must therefore also this way into the tests/ directory.
We try to keep as much shared logic actually modularised into a separate compilation unit in shared.c, however the merge_existing() and attach_vma() helpers rely on statically declared mm/vma.c functions so these must be declared in main.c.
Link: https://lkml.kernel.org/r/a0455ccfe4fdcd1c962c64f76304f612e5662a4e.1769097829.git.lorenzo.stoakes@oracle.com Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Barry Song <baohua@kernel.org> Cc: David Hildenbrand <david@kernel.org> Cc: Dev Jain <dev.jain@arm.com> Cc: Jason Gunthorpe <jgg@nvidia.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Zi Yan <ziy@nvidia.com> Cc: Damien Le Moal <dlemoal@kernel.org> Cc: "Darrick J. Wong" <djwong@kernel.org> Cc: Jarkko Sakkinen <jarkko@kernel.org> Cc: Yury Norov <ynorov@nvidia.com> Cc: Chris Mason <clm@fb.com> Cc: Pedro Falcato <pfalcato@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Revision tags: v6.19-rc6, v6.19-rc5, v6.19-rc4, v6.19-rc3, v6.19-rc2, v6.19-rc1, v6.18, v6.18-rc7, v6.18-rc6, v6.18-rc5, v6.18-rc4, v6.18-rc3, v6.18-rc2, v6.18-rc1, v6.17, v6.17-rc7 |
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| #
f088104d |
| 16-Sep-2025 |
Joonas Lahtinen <joonas.lahtinen@linux.intel.com> |
Merge drm/drm-next into drm-intel-gt-next
Backmerge in order to get the commit:
048832a3f400 ("drm/i915: Refactor shmem_pwrite() to use kiocb and write_iter")
To drm-intel-gt-next as there are f
Merge drm/drm-next into drm-intel-gt-next
Backmerge in order to get the commit:
048832a3f400 ("drm/i915: Refactor shmem_pwrite() to use kiocb and write_iter")
To drm-intel-gt-next as there are followup fixes to be applied.
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
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Revision tags: v6.17-rc6, v6.17-rc5, v6.17-rc4, v6.17-rc3, v6.17-rc2, v6.17-rc1 |
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ab93e0dd |
| 06-Aug-2025 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge branch 'next' into for-linus
Prepare input updates for 6.17 merge window.
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| #
a7bee4e7 |
| 04-Aug-2025 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge tag 'ib-mfd-gpio-input-pwm-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd into next
Merge an immutable branch between MFD, GPIO, Input and PWM to resolve conflicts for the mer
Merge tag 'ib-mfd-gpio-input-pwm-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd into next
Merge an immutable branch between MFD, GPIO, Input and PWM to resolve conflicts for the merge window pull request.
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Revision tags: v6.16, v6.16-rc7, v6.16-rc6, v6.16-rc5, v6.16-rc4 |
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| #
74f1af95 |
| 29-Jun-2025 |
Rob Clark <robin.clark@oss.qualcomm.com> |
Merge remote-tracking branch 'drm/drm-next' into msm-next
Back-merge drm-next to (indirectly) get arm-smmu updates for making stall-on-fault more reliable.
Signed-off-by: Rob Clark <robin.clark@oss
Merge remote-tracking branch 'drm/drm-next' into msm-next
Back-merge drm-next to (indirectly) get arm-smmu updates for making stall-on-fault more reliable.
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
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Revision tags: v6.16-rc3, v6.16-rc2 |
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| #
c598d5eb |
| 11-Jun-2025 |
Thomas Zimmermann <tzimmermann@suse.de> |
Merge drm/drm-next into drm-misc-next
Backmerging to forward to v6.16-rc1
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
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| #
86e2d052 |
| 09-Jun-2025 |
Thomas Hellström <thomas.hellstrom@linux.intel.com> |
Merge drm/drm-next into drm-xe-next
Backmerging to bring in 6.16
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
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| #
34c55367 |
| 09-Jun-2025 |
Jani Nikula <jani.nikula@intel.com> |
Merge drm/drm-next into drm-intel-next
Sync to v6.16-rc1, among other things to get the fixed size GENMASK_U*() and BIT_U*() macros.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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Revision tags: v6.16-rc1 |
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00c010e1 |
| 01-Jun-2025 |
Linus Torvalds <torvalds@linux-foundation.org> |
Merge tag 'mm-stable-2025-05-31-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- "Add folio_mk_pte()" from Matthew Wilcox simplifies the act of
Merge tag 'mm-stable-2025-05-31-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- "Add folio_mk_pte()" from Matthew Wilcox simplifies the act of creating a pte which addresses the first page in a folio and reduces the amount of plumbing which architecture must implement to provide this.
- "Misc folio patches for 6.16" from Matthew Wilcox is a shower of largely unrelated folio infrastructure changes which clean things up and better prepare us for future work.
- "memory,x86,acpi: hotplug memory alignment advisement" from Gregory Price adds early-init code to prevent x86 from leaving physical memory unused when physical address regions are not aligned to memory block size.
- "mm/compaction: allow more aggressive proactive compaction" from Michal Clapinski provides some tuning of the (sadly, hard-coded (more sadly, not auto-tuned)) thresholds for our invokation of proactive compaction. In a simple test case, the reduction of a guest VM's memory consumption was dramatic.
- "Minor cleanups and improvements to swap freeing code" from Kemeng Shi provides some code cleaups and a small efficiency improvement to this part of our swap handling code.
- "ptrace: introduce PTRACE_SET_SYSCALL_INFO API" from Dmitry Levin adds the ability for a ptracer to modify syscalls arguments. At this time we can alter only "system call information that are used by strace system call tampering, namely, syscall number, syscall arguments, and syscall return value.
This series should have been incorporated into mm.git's "non-MM" branch, but I goofed.
- "fs/proc: extend the PAGEMAP_SCAN ioctl to report guard regions" from Andrei Vagin extends the info returned by the PAGEMAP_SCAN ioctl against /proc/pid/pagemap. This permits CRIU to more efficiently get at the info about guard regions.
- "Fix parameter passed to page_mapcount_is_type()" from Gavin Shan implements that fix. No runtime effect is expected because validate_page_before_insert() happens to fix up this error.
- "kernel/events/uprobes: uprobe_write_opcode() rewrite" from David Hildenbrand basically brings uprobe text poking into the current decade. Remove a bunch of hand-rolled implementation in favor of using more current facilities.
- "mm/ptdump: Drop assumption that pxd_val() is u64" from Anshuman Khandual provides enhancements and generalizations to the pte dumping code. This might be needed when 128-bit Page Table Descriptors are enabled for ARM.
- "Always call constructor for kernel page tables" from Kevin Brodsky ensures that the ctor/dtor is always called for kernel pgtables, as it already is for user pgtables.
This permits the addition of more functionality such as "insert hooks to protect page tables". This change does result in various architectures performing unnecesary work, but this is fixed up where it is anticipated to occur.
- "Rust support for mm_struct, vm_area_struct, and mmap" from Alice Ryhl adds plumbing to permit Rust access to core MM structures.
- "fix incorrectly disallowed anonymous VMA merges" from Lorenzo Stoakes takes advantage of some VMA merging opportunities which we've been missing for 15 years.
- "mm/madvise: batch tlb flushes for MADV_DONTNEED and MADV_FREE" from SeongJae Park optimizes process_madvise()'s TLB flushing.
Instead of flushing each address range in the provided iovec, we batch the flushing across all the iovec entries. The syscall's cost was approximately halved with a microbenchmark which was designed to load this particular operation.
- "Track node vacancy to reduce worst case allocation counts" from Sidhartha Kumar makes the maple tree smarter about its node preallocation.
stress-ng mmap performance increased by single-digit percentages and the amount of unnecessarily preallocated memory was dramaticelly reduced.
- "mm/gup: Minor fix, cleanup and improvements" from Baoquan He removes a few unnecessary things which Baoquan noted when reading the code.
- ""Enhance sysfs handling for memory hotplug in weighted interleave" from Rakie Kim "enhances the weighted interleave policy in the memory management subsystem by improving sysfs handling, fixing memory leaks, and introducing dynamic sysfs updates for memory hotplug support". Fixes things on error paths which we are unlikely to hit.
- "mm/damon: auto-tune DAMOS for NUMA setups including tiered memory" from SeongJae Park introduces new DAMOS quota goal metrics which eliminate the manual tuning which is required when utilizing DAMON for memory tiering.
- "mm/vmalloc.c: code cleanup and improvements" from Baoquan He provides cleanups and small efficiency improvements which Baoquan found via code inspection.
- "vmscan: enforce mems_effective during demotion" from Gregory Price changes reclaim to respect cpuset.mems_effective during demotion when possible. because presently, reclaim explicitly ignores cpuset.mems_effective when demoting, which may cause the cpuset settings to violated.
This is useful for isolating workloads on a multi-tenant system from certain classes of memory more consistently.
- "Clean up split_huge_pmd_locked() and remove unnecessary folio pointers" from Gavin Guo provides minor cleanups and efficiency gains in in the huge page splitting and migrating code.
- "Use kmem_cache for memcg alloc" from Huan Yang creates a slab cache for `struct mem_cgroup', yielding improved memory utilization.
- "add max arg to swappiness in memory.reclaim and lru_gen" from Zhongkun He adds a new "max" argument to the "swappiness=" argument for memory.reclaim MGLRU's lru_gen.
This directs proactive reclaim to reclaim from only anon folios rather than file-backed folios.
- "kexec: introduce Kexec HandOver (KHO)" from Mike Rapoport is the first step on the path to permitting the kernel to maintain existing VMs while replacing the host kernel via file-based kexec. At this time only memblock's reserve_mem is preserved.
- "mm: Introduce for_each_valid_pfn()" from David Woodhouse provides and uses a smarter way of looping over a pfn range. By skipping ranges of invalid pfns.
- "sched/numa: Skip VMA scanning on memory pinned to one NUMA node via cpuset.mems" from Libo Chen removes a lot of pointless VMA scanning when a task is pinned a single NUMA mode.
Dramatic performance benefits were seen in some real world cases.
- "JFS: Implement migrate_folio for jfs_metapage_aops" from Shivank Garg addresses a warning which occurs during memory compaction when using JFS.
- "move all VMA allocation, freeing and duplication logic to mm" from Lorenzo Stoakes moves some VMA code from kernel/fork.c into the more appropriate mm/vma.c.
- "mm, swap: clean up swap cache mapping helper" from Kairui Song provides code consolidation and cleanups related to the folio_index() function.
- "mm/gup: Cleanup memfd_pin_folios()" from Vishal Moola does that.
- "memcg: Fix test_memcg_min/low test failures" from Waiman Long addresses some bogus failures which are being reported by the test_memcontrol selftest.
- "eliminate mmap() retry merge, add .mmap_prepare hook" from Lorenzo Stoakes commences the deprecation of file_operations.mmap() in favor of the new file_operations.mmap_prepare().
The latter is more restrictive and prevents drivers from messing with things in ways which, amongst other problems, may defeat VMA merging.
- "memcg: decouple memcg and objcg stocks"" from Shakeel Butt decouples the per-cpu memcg charge cache from the objcg's one.
This is a step along the way to making memcg and objcg charging NMI-safe, which is a BPF requirement.
- "mm/damon: minor fixups and improvements for code, tests, and documents" from SeongJae Park is yet another batch of miscellaneous DAMON changes. Fix and improve minor problems in code, tests and documents.
- "memcg: make memcg stats irq safe" from Shakeel Butt converts memcg stats to be irq safe. Another step along the way to making memcg charging and stats updates NMI-safe, a BPF requirement.
- "Let unmap_hugepage_range() and several related functions take folio instead of page" from Fan Ni provides folio conversions in the hugetlb code.
* tag 'mm-stable-2025-05-31-14-50' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (285 commits) mm: pcp: increase pcp->free_count threshold to trigger free_high mm/hugetlb: convert use of struct page to folio in __unmap_hugepage_range() mm/hugetlb: refactor __unmap_hugepage_range() to take folio instead of page mm/hugetlb: refactor unmap_hugepage_range() to take folio instead of page mm/hugetlb: pass folio instead of page to unmap_ref_private() memcg: objcg stock trylock without irq disabling memcg: no stock lock for cpu hot-unplug memcg: make __mod_memcg_lruvec_state re-entrant safe against irqs memcg: make count_memcg_events re-entrant safe against irqs memcg: make mod_memcg_state re-entrant safe against irqs memcg: move preempt disable to callers of memcg_rstat_updated memcg: memcg_rstat_updated re-entrant safe against irqs mm: khugepaged: decouple SHMEM and file folios' collapse selftests/eventfd: correct test name and improve messages alloc_tag: check mem_profiling_support in alloc_tag_init Docs/damon: update titles and brief introductions to explain DAMOS selftests/damon/_damon_sysfs: read tried regions directories in order mm/damon/tests/core-kunit: add a test for damos_set_filters_default_reject() mm/damon/paddr: remove unused variable, folio_list, in damon_pa_stat() mm/damon/sysfs-schemes: fix wrong comment on damons_sysfs_quota_goal_metric_strs ...
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Revision tags: v6.15, v6.15-rc7, v6.15-rc6, v6.15-rc5 |
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| #
3e43e260 |
| 28-Apr-2025 |
Lorenzo Stoakes <lorenzo.stoakes@oracle.com> |
mm: perform VMA allocation, freeing, duplication in mm
Right now these are performed in kernel/fork.c which is odd and a violation of separation of concerns, as well as preventing us from integratin
mm: perform VMA allocation, freeing, duplication in mm
Right now these are performed in kernel/fork.c which is odd and a violation of separation of concerns, as well as preventing us from integrating this and related logic into userland VMA testing going forward.
There is a fly in the ointment - nommu - mmap.c is not compiled if CONFIG_MMU not set, and neither is vma.c.
To square the circle, let's add a new file - vma_init.c. This will be compiled for both CONFIG_MMU and nommu builds, and will also form part of the VMA userland testing.
This allows us to de-duplicate code, while maintaining separation of concerns and the ability for us to userland test this logic.
Update the VMA userland tests accordingly, additionally adding a detach_free_vma() helper function to correctly detach VMAs before freeing them in test code, as this change was triggering the assert for this.
[akpm@linux-foundation.org: remove stray newline, per Liam] Link: https://lkml.kernel.org/r/f97b3a85a6da0196b28070df331b99e22b263be8.1745853549.git.lorenzo.stoakes@oracle.com Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com> Reviewed-by: Pedro Falcato <pfalcato@suse.de> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Kees Cook <kees@kernel.org> Reviewed-by: Suren Baghdasaryan <surenb@google.com> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christian Brauner <brauner@kernel.org> Cc: Jan Kara <jack@suse.cz> Cc: Jann Horn <jannh@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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| #
6c36ac1e |
| 28-Apr-2025 |
Lorenzo Stoakes <lorenzo.stoakes@oracle.com> |
mm: establish mm/vma_exec.c for shared exec/mm VMA functionality
Patch series "move all VMA allocation, freeing and duplication logic to mm", v3.
Currently VMA allocation, freeing and duplication e
mm: establish mm/vma_exec.c for shared exec/mm VMA functionality
Patch series "move all VMA allocation, freeing and duplication logic to mm", v3.
Currently VMA allocation, freeing and duplication exist in kernel/fork.c, which is a violation of separation of concerns, and leaves these functions exposed to the rest of the kernel when they are in fact internal implementation details.
Resolve this by moving this logic to mm, and making it internal to vma.c, vma.h.
This also allows us, in future, to provide userland testing around this functionality.
We additionally abstract dup_mmap() to mm, being careful to ensure kernel/fork.c acceses this via the mm internal header so it is not exposed elsewhere in the kernel.
As part of this change, also abstract initial stack allocation performed in __bprm_mm_init() out of fs code into mm via the create_init_stack_vma(), as this code uses vm_area_alloc() and vm_area_free().
In order to do so sensibly, we introduce a new mm/vma_exec.c file, which contains the code that is shared by mm and exec. This file is added to both memory mapping and exec sections in MAINTAINERS so both sets of maintainers can maintain oversight.
As part of this change, we also move relocate_vma_down() to mm/vma_exec.c so all shared mm/exec functionality is kept in one place.
We add code shared between nommu and mmu-enabled configurations in order to share VMA allocation, freeing and duplication code correctly while also keeping these functions available in userland VMA testing.
This is achieved by adding a mm/vma_init.c file which is also compiled by the userland tests.
This patch (of 4):
There is functionality that overlaps the exec and memory mapping subsystems. While it properly belongs in mm, it is important that exec maintainers maintain oversight of this functionality correctly.
We can establish both goals by adding a new mm/vma_exec.c file which contains these 'glue' functions, and have fs/exec.c import them.
As a part of this change, to ensure that proper oversight is achieved, add the file to both the MEMORY MAPPING and EXEC & BINFMT API, ELF sections.
scripts/get_maintainer.pl can correctly handle files in multiple entries and this neatly handles the cross-over.
[akpm@linux-foundation.org: fix comment typo] Link: https://lkml.kernel.org/r/80f0d0c6-0b68-47f9-ab78-0ab7f74677fc@lucifer.local Link: https://lkml.kernel.org/r/cover.1745853549.git.lorenzo.stoakes@oracle.com Link: https://lkml.kernel.org/r/91f2cee8f17d65214a9d83abb7011aa15f1ea690.1745853549.git.lorenzo.stoakes@oracle.com Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com> Reviewed-by: Suren Baghdasaryan <surenb@google.com> Reviewed-by: Pedro Falcato <pfalcato@suse.de> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Kees Cook <kees@kernel.org> Reviewed-by: Vlastimil Babka <vbabka@suse.cz> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christian Brauner <brauner@kernel.org> Cc: Jan Kara <jack@suse.cz> Cc: Jann Horn <jannh@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Revision tags: v6.15-rc4, v6.15-rc3, v6.15-rc2, v6.15-rc1, v6.14, v6.14-rc7, v6.14-rc6, v6.14-rc5, v6.14-rc4, v6.14-rc3, v6.14-rc2 |
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c771600c |
| 05-Feb-2025 |
Tvrtko Ursulin <tursulin@ursulin.net> |
Merge drm/drm-next into drm-intel-gt-next
We need 4ba4f1afb6a9 ("perf: Generic hotplug support for a PMU with a scope") in order to land a i915 PMU simplification and a fix. That landed in 6.12 and
Merge drm/drm-next into drm-intel-gt-next
We need 4ba4f1afb6a9 ("perf: Generic hotplug support for a PMU with a scope") in order to land a i915 PMU simplification and a fix. That landed in 6.12 and we are stuck at 6.9 so lets bump things forward.
Signed-off-by: Tvrtko Ursulin <tursulin@ursulin.net>
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Revision tags: v6.14-rc1 |
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25768de5 |
| 21-Jan-2025 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge branch 'next' into for-linus
Prepare input updates for 6.14 merge window.
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Revision tags: v6.13, v6.13-rc7, v6.13-rc6, v6.13-rc5, v6.13-rc4 |
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6d4a0f4e |
| 17-Dec-2024 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge tag 'v6.13-rc3' into next
Sync up with the mainline.
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Revision tags: v6.13-rc3, v6.13-rc2, v6.13-rc1, v6.12, v6.12-rc7, v6.12-rc6, v6.12-rc5, v6.12-rc4 |
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77b67945 |
| 14-Oct-2024 |
Namhyung Kim <namhyung@kernel.org> |
Merge tag 'v6.12-rc3' into perf-tools-next
To get the fixes in the current perf-tools tree.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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Revision tags: v6.12-rc3, v6.12-rc2 |
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3fd6c590 |
| 30-Sep-2024 |
Jerome Brunet <jbrunet@baylibre.com> |
Merge tag 'v6.12-rc1' into clk-meson-next
Linux 6.12-rc1
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a0efa2f3 |
| 09-Oct-2024 |
Johannes Berg <johannes.berg@intel.com> |
Merge net-next/main to resolve conflicts
The wireless-next tree was based on something older, and there are now conflicts between -rc2 and work here. Merge net-next, which has enough of -rc2 for the
Merge net-next/main to resolve conflicts
The wireless-next tree was based on something older, and there are now conflicts between -rc2 and work here. Merge net-next, which has enough of -rc2 for the conflicts to happen, resolving them in the process.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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b88132ce |
| 04-Oct-2024 |
Thomas Hellström <thomas.hellstrom@linux.intel.com> |
Merge drm/drm-next into drm-xe-next
Backmerging to resolve a conflict with core locally.
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
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2dd0ef5d |
| 30-Sep-2024 |
Thomas Zimmermann <tzimmermann@suse.de> |
Merge drm/drm-next into drm-misc-next
Get drm-misc-next to up v6.12-rc1.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
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e0568571 |
| 30-Sep-2024 |
Jani Nikula <jani.nikula@intel.com> |
Merge drm/drm-next into drm-intel-next
Sync to v6.12-rc1.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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f33e46a0 |
| 18-Nov-2024 |
Jiri Kosina <jkosina@suse.com> |
Merge branch 'for-6.13/wacom' into for-linus
- Sanitization of BTN_TOOL_RUBBER handling (Jason Gerecke)
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