From: Liam Howlett <liam.howlett@oracle.com>
To: "maple-tree@lists.infradead.org" <maple-tree@lists.infradead.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Yu Zhao <yuzhao@google.com>, Hugh Dickins <hughd@google.com>
Subject: [PATCH v11 69/69] mm/mmap.c: pass in mapping to __vma_link_file()
Date: Sun, 17 Jul 2022 02:46:59 +0000 [thread overview]
Message-ID: <20220717024615.2106835-70-Liam.Howlett@oracle.com> (raw)
In-Reply-To: <20220717024615.2106835-1-Liam.Howlett@oracle.com>
From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>
__vma_link_file() resolves the mapping from the file, if there is one.
Pass through the mapping and check the vm_file externally since most
places already have the required information and check of vm_file.
Link: https://lkml.kernel.org/r/20220504011345.662299-54-Liam.Howlett@oracle.com
Link: https://lkml.kernel.org/r/20220621204632.3370049-70-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Howells <dhowells@redhat.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
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>
---
mm/mmap.c | 33 +++++++++++++++------------------
1 file changed, 15 insertions(+), 18 deletions(-)
diff --git a/mm/mmap.c b/mm/mmap.c
index 1c35cd0ec4c7..d24a3a4b669a 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -246,6 +246,7 @@ SYSCALL_DEFINE1(brk, unsigned long, brk)
if (brk < min_brk)
goto out;
+
/*
* Check against rlimit here. If this check is done later after the test
* of oldbrk with newbrk then it can escape the test and let the data
@@ -322,7 +323,6 @@ SYSCALL_DEFINE1(brk, unsigned long, brk)
if (populate)
mm_populate(oldbrk, newbrk - oldbrk);
return brk;
-
out:
mmap_write_unlock(mm);
return origbrk;
@@ -454,21 +454,15 @@ static unsigned long count_vma_pages_range(struct mm_struct *mm,
return nr_pages;
}
-static void __vma_link_file(struct vm_area_struct *vma)
+static void __vma_link_file(struct vm_area_struct *vma,
+ struct address_space *mapping)
{
- struct file *file;
-
- file = vma->vm_file;
- if (file) {
- struct address_space *mapping = file->f_mapping;
-
- if (vma->vm_flags & VM_SHARED)
- mapping_allow_writable(mapping);
+ if (vma->vm_flags & VM_SHARED)
+ mapping_allow_writable(mapping);
- flush_dcache_mmap_lock(mapping);
- vma_interval_tree_insert(vma, &mapping->i_mmap);
- flush_dcache_mmap_unlock(mapping);
- }
+ flush_dcache_mmap_lock(mapping);
+ vma_interval_tree_insert(vma, &mapping->i_mmap);
+ flush_dcache_mmap_unlock(mapping);
}
/*
@@ -535,10 +529,11 @@ static int vma_link(struct mm_struct *mm, struct vm_area_struct *vma)
}
vma_mas_store(vma, &mas);
- __vma_link_file(vma);
- if (mapping)
+ if (mapping) {
+ __vma_link_file(vma, mapping);
i_mmap_unlock_write(mapping);
+ }
mm->map_count++;
validate_mm(mm);
@@ -784,14 +779,14 @@ int __vma_adjust(struct vm_area_struct *vma, unsigned long start,
uprobe_munmap(next, next->vm_start, next->vm_end);
i_mmap_lock_write(mapping);
- if (insert) {
+ if (insert && insert->vm_file) {
/*
* Put into interval tree now, so instantiated pages
* are visible to arm/parisc __flush_dcache_page
* throughout; but we cannot insert into address
* space until vma start or end is updated.
*/
- __vma_link_file(insert);
+ __vma_link_file(insert, insert->vm_file->f_mapping);
}
}
@@ -3043,6 +3038,7 @@ static int do_brk_flags(struct ma_state *mas, struct vm_area_struct *vma,
struct mm_struct *mm = current->mm;
validate_mm_mt(mm);
+
/*
* Check against address space limits by the changed size
* Note: This happens *after* clearing old mappings in some code paths.
@@ -3100,6 +3096,7 @@ static int do_brk_flags(struct ma_state *mas, struct vm_area_struct *vma,
goto mas_store_fail;
mm->map_count++;
+
out:
perf_event_mmap(vma);
mm->total_vm += len >> PAGE_SHIFT;
--
2.35.1
next prev parent reply other threads:[~2022-07-17 2:48 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-17 2:46 [PATCH v11 00/69] Introducing the Maple Tree Liam Howlett
2022-07-17 2:46 ` [PATCH v11 02/69] radix tree test suite: add pr_err define Liam Howlett
2022-07-17 2:46 ` [PATCH v11 01/69] Maple Tree: add new data structure Liam Howlett
2022-07-17 2:46 ` [PATCH v11 03/69] radix tree test suite: add kmem_cache_set_non_kernel() Liam Howlett
2022-07-17 2:46 ` [PATCH v11 04/69] radix tree test suite: add allocation counts and size to kmem_cache Liam Howlett
2022-07-17 2:46 ` [PATCH v11 05/69] radix tree test suite: add support for slab bulk APIs Liam Howlett
2022-07-17 2:46 ` [PATCH v11 06/69] radix tree test suite: add lockdep_is_held to header Liam Howlett
2022-07-17 2:46 ` [PATCH v11 07/69] lib/test_maple_tree: add testing for maple tree Liam Howlett
2022-07-17 2:46 ` [PATCH v11 10/69] mmap: use the VMA iterator in count_vma_pages_range() Liam Howlett
2022-07-17 2:46 ` [PATCH v11 09/69] mm: add VMA iterator Liam Howlett
2022-07-17 2:46 ` [PATCH v11 08/69] mm: start tracking VMAs with maple tree Liam Howlett
2022-07-17 2:46 ` [PATCH v11 11/69] mm/mmap: use the maple tree in find_vma() instead of the rbtree Liam Howlett
2022-07-17 2:46 ` [PATCH v11 12/69] mm/mmap: use the maple tree for find_vma_prev() " Liam Howlett
2022-07-17 2:46 ` [PATCH v11 13/69] mm/mmap: use maple tree for unmapped_area{_topdown} Liam Howlett
2022-07-17 2:46 ` [PATCH v11 16/69] proc: remove VMA rbtree use from nommu Liam Howlett
2022-07-17 2:46 ` [PATCH v11 15/69] damon: convert __damon_va_three_regions to use the VMA iterator Liam Howlett
2022-07-17 2:46 ` [PATCH v11 14/69] kernel/fork: use maple tree for dup_mmap() during forking Liam Howlett
2022-07-17 2:46 ` [PATCH v11 18/69] mmap: change zeroing of maple tree in __vma_adjust() Liam Howlett
2022-07-17 2:46 ` [PATCH v11 17/69] mm: remove rb tree Liam Howlett
2022-07-17 2:46 ` [PATCH v11 19/69] xen: use vma_lookup() in privcmd_ioctl_mmap() Liam Howlett
2022-07-17 2:46 ` [PATCH v11 20/69] mm: optimize find_exact_vma() to use vma_lookup() Liam Howlett
2022-07-17 2:46 ` [PATCH v11 22/69] mm/mmap: change do_brk_flags() to expand existing VMA and add do_brk_munmap() Liam Howlett
2022-07-17 2:46 ` [PATCH v11 21/69] mm/khugepaged: optimize collapse_pte_mapped_thp() by using vma_lookup() Liam Howlett
2022-07-17 2:46 ` [PATCH v11 23/69] mm: use maple tree operations for find_vma_intersection() Liam Howlett
2022-07-17 2:46 ` [PATCH v11 24/69] mm/mmap: use advanced maple tree API for mmap_region() Liam Howlett
2022-07-17 2:46 ` [PATCH v11 25/69] mm: remove vmacache Liam Howlett
2022-07-17 2:46 ` [PATCH v11 26/69] mm: convert vma_lookup() to use mtree_load() Liam Howlett
2022-07-17 2:46 ` [PATCH v11 27/69] mm/mmap: move mmap_region() below do_munmap() Liam Howlett
2022-07-17 2:46 ` [PATCH v11 29/69] mm/mmap: change do_brk_munmap() to use do_mas_align_munmap() Liam Howlett
2022-07-17 2:46 ` [PATCH v11 28/69] mm/mmap: reorganize munmap to use maple states Liam Howlett
2022-07-17 2:46 ` [PATCH v11 30/69] arm64: remove mmap linked list from vdso Liam Howlett
2022-07-17 2:46 ` [PATCH v11 31/69] arm64: Change elfcore for_each_mte_vma() to use VMA iterator Liam Howlett
2022-07-17 2:46 ` [PATCH v11 32/69] parisc: remove mmap linked list from cache handling Liam Howlett
2022-07-17 2:46 ` [PATCH v11 34/69] s390: remove vma linked list walks Liam Howlett
2022-07-17 2:46 ` [PATCH v11 33/69] powerpc: remove mmap " Liam Howlett
2022-07-17 2:46 ` [PATCH v11 36/69] xtensa: remove vma " Liam Howlett
2022-07-17 2:46 ` [PATCH v11 37/69] cxl: remove vma linked list walk Liam Howlett
2022-07-17 2:46 ` [PATCH v11 35/69] x86: remove vma linked list walks Liam Howlett
2022-07-17 2:46 ` [PATCH v11 39/69] um: remove vma linked list walk Liam Howlett
2022-07-17 2:46 ` [PATCH v11 38/69] optee: " Liam Howlett
2022-07-17 2:46 ` [PATCH v11 41/69] exec: use VMA iterator instead of linked list Liam Howlett
2022-07-17 2:46 ` [PATCH v11 40/69] coredump: remove vma linked list walk Liam Howlett
2022-07-17 2:46 ` [PATCH v11 44/69] userfaultfd: use maple tree iterator to iterate VMAs Liam Howlett
2022-07-17 2:46 ` [PATCH v11 42/69] fs/proc/base: use maple tree iterators in place of linked list Liam Howlett
2022-07-17 2:46 ` [PATCH v11 43/69] fs/proc/task_mmu: stop using linked list and highest_vm_end Liam Howlett
2022-07-17 2:46 ` [PATCH v11 46/69] acct: use VMA iterator instead of linked list Liam Howlett
2022-07-17 2:46 ` [PATCH v11 47/69] perf: use VMA iterator Liam Howlett
2022-07-17 2:46 ` [PATCH v11 45/69] ipc/shm: use VMA iterator instead of linked list Liam Howlett
2022-07-17 2:46 ` [PATCH v11 49/69] fork: use VMA iterator Liam Howlett
2022-07-17 2:46 ` [PATCH v11 48/69] sched: use maple tree iterator to walk VMAs Liam Howlett
2022-07-17 2:46 ` [PATCH v11 50/69] bpf: remove VMA linked list Liam Howlett
2022-07-17 2:46 ` [PATCH v11 54/69] mm/madvise: use vma_find() instead of vma " Liam Howlett
2022-07-17 2:46 ` [PATCH v11 53/69] mm/ksm: use vma iterators " Liam Howlett
2022-07-17 2:46 ` [PATCH v11 51/69] mm/gup: use maple tree navigation instead of " Liam Howlett
2022-07-17 2:46 ` [PATCH v11 52/69] mm/khugepaged: stop using vma " Liam Howlett
2022-07-17 2:46 ` [PATCH v11 57/69] mm/mlock: use vma iterator and maple state instead of " Liam Howlett
2022-07-17 2:46 ` [PATCH v11 55/69] mm/memcontrol: stop using mm->highest_vm_end Liam Howlett
2022-07-17 2:46 ` [PATCH v11 56/69] mm/mempolicy: use vma iterator & maple state instead of vma linked list Liam Howlett
2022-07-17 2:46 ` [PATCH v11 59/69] mm/mremap: use vma_find_intersection() " Liam Howlett
2022-07-17 2:46 ` [PATCH v11 60/69] mm/msync: use vma_find() " Liam Howlett
2022-07-17 2:46 ` [PATCH v11 58/69] mm/mprotect: use maple tree navigation " Liam Howlett
2022-07-17 2:46 ` [PATCH v11 63/69] mm/swapfile: use vma iterator " Liam Howlett
2022-07-17 2:46 ` [PATCH v11 62/69] mm/pagewalk: use vma_find() " Liam Howlett
2022-07-17 2:46 ` [PATCH v11 61/69] mm/oom_kill: use maple tree iterators " Liam Howlett
2022-07-17 2:46 ` [PATCH v11 64/69] i915: use the VMA iterator Liam Howlett
2022-07-17 2:46 ` [PATCH v11 67/69] mm: remove the vma linked list Liam Howlett
2022-07-17 2:46 ` [PATCH v11 66/69] riscv: use vma iterator for vdso Liam Howlett
2022-07-17 2:46 ` [PATCH v11 65/69] nommu: remove uses of VMA linked list Liam Howlett
2022-07-17 2:46 ` [PATCH v11 68/69] mm/mmap: drop range_has_overlap() function Liam Howlett
2022-07-17 2:46 ` Liam Howlett [this message]
2022-07-17 4:20 ` [PATCH v11 00/69] Introducing the Maple Tree Andrew Morton
2022-07-17 5:57 ` Yu Zhao
2022-07-17 12:42 ` Liam Howlett
2022-07-17 13:06 ` Liam Howlett
2022-07-17 18:55 ` Yu Zhao
2022-07-17 13:01 ` Liam Howlett
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