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| author | Liam R. Howlett <Liam.Howlett@Oracle.com> | 2022-06-21 20:46:53 +0000 |
|---|---|---|
| committer | akpm <akpm@linux-foundation.org> | 2022-06-27 13:45:01 -0700 |
| commit | 2ee236fe53a8e2ab54679c74e8a1fb77e55b29bb (patch) | |
| tree | e648f4052f95c9fceb4573a8f8e6197da726e771 /include/linux/mm.h | |
| parent | 9400b59d2e5546fc603bf7047336fe76e1065c52 (diff) | |
| download | linux-next-2ee236fe53a8e2ab54679c74e8a1fb77e55b29bb.tar.gz linux-next-2ee236fe53a8e2ab54679c74e8a1fb77e55b29bb.zip | |
mm: start tracking VMAs with maple tree
Start tracking the VMAs with the new maple tree structure in parallel with
the rb_tree. Add debug and trace events for maple tree operations and
duplicate the rb_tree that is created on forks into the maple tree.
The maple tree is added to the mm_struct including the mm_init struct,
added support in required mm/mmap functions, added tracking in kernel/fork
for process forking, and used to find the unmapped_area and checked
against what the rbtree finds.
This also moves the mmap_lock() in exit_mmap() since the oom reaper call
does walk the VMAs. Otherwise lockdep will be unhappy if oom happens.
Link: https://lkml.kernel.org/r/20220504010716.661115-10-Liam.Howlett@oracle.com
Link: https://lkml.kernel.org/r/20220621204632.3370049-9-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Howells <dhowells@redhat.com>
Cc: SeongJae Park <sj@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index cf3d0d673f6b..adc963765d95 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2581,6 +2581,8 @@ extern bool arch_has_descending_max_zone_pfns(void); /* nommu.c */ extern atomic_long_t mmap_pages_allocated; extern int nommu_shrink_inode_mappings(struct inode *, size_t, size_t); +/* mmap.c */ +void vma_mas_store(struct vm_area_struct *vma, struct ma_state *mas); /* interval_tree.c */ void vma_interval_tree_insert(struct vm_area_struct *node, @@ -2644,6 +2646,9 @@ extern struct vm_area_struct *copy_vma(struct vm_area_struct **, bool *need_rmap_locks); extern void exit_mmap(struct mm_struct *); +void vma_mas_store(struct vm_area_struct *vma, struct ma_state *mas); +void vma_mas_remove(struct vm_area_struct *vma, struct ma_state *mas); + static inline int check_data_rlimit(unsigned long rlim, unsigned long new, unsigned long start, |