From: Liam Howlett <liam.howlett@oracle.com>
To: "linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
"maple-tree@lists.infradead.org" <maple-tree@lists.infradead.org>
Cc: Liam Howlett <liam.howlett@oracle.com>,
Liam Howlett <liam.howlett@oracle.com>
Subject: [PATCH v3 09/48] kernel/fork: Convert forking to using the vmi iterator
Date: Tue, 17 Jan 2023 02:34:12 +0000 [thread overview]
Message-ID: <20230117023335.1690727-10-Liam.Howlett@oracle.com> (raw)
In-Reply-To: <20230117023335.1690727-1-Liam.Howlett@oracle.com>
From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>
Avoid using the maple tree interface directly. This gains type safety.
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
---
kernel/fork.c | 19 ++++++++-----------
1 file changed, 8 insertions(+), 11 deletions(-)
diff --git a/kernel/fork.c b/kernel/fork.c
index 9f7fe3541897..441dcec60aae 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -585,8 +585,8 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
int retval;
unsigned long charge = 0;
LIST_HEAD(uf);
- MA_STATE(old_mas, &oldmm->mm_mt, 0, 0);
- MA_STATE(mas, &mm->mm_mt, 0, 0);
+ VMA_ITERATOR(old_vmi, oldmm, 0);
+ VMA_ITERATOR(vmi, mm, 0);
uprobe_start_dup_mmap();
if (mmap_write_lock_killable(oldmm)) {
@@ -613,11 +613,11 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
goto out;
khugepaged_fork(mm, oldmm);
- retval = mas_expected_entries(&mas, oldmm->map_count);
+ retval = vma_iter_bulk_alloc(&vmi, oldmm->map_count);
if (retval)
goto out;
- mas_for_each(&old_mas, mpnt, ULONG_MAX) {
+ for_each_vma(old_vmi, mpnt) {
struct file *file;
if (mpnt->vm_flags & VM_DONTCOPY) {
@@ -683,11 +683,8 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
hugetlb_dup_vma_private(tmp);
/* Link the vma into the MT */
- mas.index = tmp->vm_start;
- mas.last = tmp->vm_end - 1;
- mas_store(&mas, tmp);
- if (mas_is_err(&mas))
- goto fail_nomem_mas_store;
+ if (vma_iter_bulk_store(&vmi, tmp))
+ goto fail_nomem_vmi_store;
mm->map_count++;
if (!(tmp->vm_flags & VM_WIPEONFORK))
@@ -702,7 +699,7 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
/* a new mm has just been created */
retval = arch_dup_mmap(oldmm, mm);
loop_out:
- mas_destroy(&mas);
+ vma_iter_free(&vmi);
out:
mmap_write_unlock(mm);
flush_tlb_mm(oldmm);
@@ -712,7 +709,7 @@ static __latent_entropy int dup_mmap(struct mm_struct *mm,
uprobe_end_dup_mmap();
return retval;
-fail_nomem_mas_store:
+fail_nomem_vmi_store:
unlink_anon_vmas(tmp);
fail_nomem_anon_vma_fork:
mpol_put(vma_policy(tmp));
--
2.35.1
next prev parent reply other threads:[~2023-01-17 2:34 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-17 2:34 [PATCH v3 00/48] VMA tree type safety and remove __vma_adjust() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 01/48] maple_tree: Add mas_init() function Liam Howlett
2023-01-17 2:34 ` [PATCH v3 03/48] maple_tree: Reduce user error potential Liam Howlett
2023-01-17 2:34 ` [PATCH v3 02/48] maple_tree: Fix potential rcu issue Liam Howlett
2023-01-17 2:34 ` [PATCH v3 04/48] test_maple_tree: Test modifications while iterating Liam Howlett
2023-01-17 2:34 ` [PATCH v3 07/48] mm: Expand vma iterator interface Liam Howlett
2023-01-17 2:34 ` [PATCH v3 05/48] maple_tree: Fix handle of invalidated state in mas_wr_store_setup() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 06/48] maple_tree: Fix mas_prev() and mas_find() state handling Liam Howlett
2023-01-17 2:34 ` [PATCH v3 08/48] mm/mmap: convert brk to use vma iterator Liam Howlett
2023-01-17 2:34 ` Liam Howlett [this message]
2023-01-17 2:34 ` [PATCH v3 12/48] mmap: Change do_mas_munmap and do_mas_aligned_munmap() " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 10/48] mmap: Convert vma_link() " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 11/48] mm/mmap: Remove preallocation from do_mas_align_munmap() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 14/48] mm: Add temporary vma iterator versions of vma_merge(), split_vma(), and __split_vma() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 13/48] mmap: Convert vma_expand() to use vma iterator Liam Howlett
2023-01-17 2:34 ` [PATCH v3 15/48] ipc/shm: Use the vma iterator for munmap calls Liam Howlett
2023-01-17 2:34 ` [PATCH v3 16/48] userfaultfd: Use vma iterator Liam Howlett
2023-01-17 2:34 ` [PATCH v3 18/48] mlock: Convert mlock to " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 17/48] mm: Change mprotect_fixup " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 21/48] task_mmu: Convert " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 20/48] mempolicy: " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 19/48] coredump: " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 23/48] madvise: Use vmi iterator for __split_vma() and vma_merge() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 24/48] mmap: Pass through vmi iterator to __split_vma() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 22/48] sched: Convert to vma iterator Liam Howlett
2023-01-17 2:34 ` [PATCH v3 25/48] mmap: Use vmi version of vma_merge() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 28/48] nommu: Pass through vma iterator to shrink_vma() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 26/48] mm/mremap: Use vmi version of vma_merge() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 27/48] nommu: Convert nommu to using the vma iterator Liam Howlett
2023-01-17 2:34 ` [PATCH v3 30/48] mm/damon: Stop using vma_mas_store() for maple tree store Liam Howlett
2023-01-17 19:11 ` SeongJae Park
2023-01-17 19:16 ` SeongJae Park
2023-01-17 22:20 ` Daniel Latypov
2023-01-17 22:47 ` Liam Howlett
2023-01-19 2:00 ` SeongJae Park
2023-01-19 18:55 ` Liam R. Howlett
2023-01-17 2:34 ` [PATCH v3 31/48] mmap: Convert __vma_adjust() to use vma iterator Liam Howlett
2023-01-17 2:34 ` [PATCH v3 29/48] mm: Switch vma_merge(), split_vma(), and __split_vma to " Liam Howlett
2023-01-17 2:34 ` [PATCH v3 35/48] mm: Pass vma iterator through to __vma_adjust() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 33/48] madvise: Use split_vma() instead of __split_vma() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 34/48] mm: Remove unnecessary write to vma iterator in __vma_adjust() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 32/48] mm: Pass through vma iterator to __vma_adjust() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 36/48] mm: Add vma iterator to vma_adjust() arguments Liam Howlett
2023-01-17 2:34 ` [PATCH v3 38/48] mm: Change munmap splitting order and move_vma() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 37/48] mmap: Clean up mmap_region() unrolling Liam Howlett
2023-01-17 2:34 ` [PATCH v3 41/48] mm/mmap: Use vma_prepare() and vma_complete() in vma_expand() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 39/48] mm/mmap: move anon_vma setting in __vma_adjust() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 42/48] mm/mmap: Introduce init_vma_prep() and init_multi_vma_prep() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 40/48] mm/mmap: Refactor locking out of __vma_adjust() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 43/48] mm: Don't use __vma_adjust() in __split_vma() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 44/48] mm/mmap: Don't use __vma_adjust() in shift_arg_pages() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 45/48] mm/mmap: Introduce dup_vma_anon() helper Liam Howlett
2023-01-17 2:34 ` [PATCH v3 47/48] mm/mmap: Remove __vma_adjust() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 46/48] mm/mmap: Convert do_brk_flags() to use vma_prepare() and vma_complete() Liam Howlett
2023-01-17 2:34 ` [PATCH v3 48/48] vma_merge: Set vma iterator to correct position Liam Howlett
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