Message ID | 20230117023335.1690727-22-Liam.Howlett@oracle.com (mailing list archive) |
---|---|
State | New |
Headers | show
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Tue, 17 Jan 2023 02:34:19 +0000 Received: from SN6PR10MB3022.namprd10.prod.outlook.com ([fe80::a02:2ac8:ee3e:682]) by SN6PR10MB3022.namprd10.prod.outlook.com ([fe80::a02:2ac8:ee3e:682%4]) with mapi id 15.20.6002.012; Tue, 17 Jan 2023 02:34:19 +0000 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 21/48] task_mmu: Convert to vma iterator Thread-Topic: [PATCH v3 21/48] task_mmu: Convert to vma iterator Thread-Index: AQHZKhwxCx8GvgirI0CZkAgmDYLl0Q== Date: Tue, 17 Jan 2023 02:34:16 +0000 Message-ID: <20230117023335.1690727-22-Liam.Howlett@oracle.com> References: <20230117023335.1690727-1-Liam.Howlett@oracle.com> In-Reply-To: <20230117023335.1690727-1-Liam.Howlett@oracle.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.35.1 x-ms-publictraffictype: Email x-ms-traffictypediagnostic: SN6PR10MB3022:EE_|CO6PR10MB5538:EE_ x-ms-office365-filtering-correlation-id: e1393d10-a8b4-4e57-2407-08daf833560a x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; 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Series |
VMA tree type safety and remove __vma_adjust()
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expand
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diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index e35a0398db63..be8d54e45226 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -892,7 +892,7 @@ static int show_smaps_rollup(struct seq_file *m, void *v) struct vm_area_struct *vma; unsigned long vma_start = 0, last_vma_end = 0; int ret = 0; - MA_STATE(mas, &mm->mm_mt, 0, 0); + VMA_ITERATOR(vmi, mm, 0); priv->task = get_proc_task(priv->inode); if (!priv->task) @@ -910,7 +910,7 @@ static int show_smaps_rollup(struct seq_file *m, void *v) goto out_put_mm; hold_task_mempolicy(priv); - vma = mas_find(&mas, ULONG_MAX); + vma = vma_next(&vmi); if (unlikely(!vma)) goto empty_set; @@ -925,7 +925,7 @@ static int show_smaps_rollup(struct seq_file *m, void *v) * access it for write request. */ if (mmap_lock_is_contended(mm)) { - mas_pause(&mas); + vma_iter_invalidate(&vmi); mmap_read_unlock(mm); ret = mmap_read_lock_killable(mm); if (ret) { @@ -950,31 +950,31 @@ static int show_smaps_rollup(struct seq_file *m, void *v) * * 1) VMA2 is freed, but VMA3 exists: * - * find_vma(mm, 16k - 1) will return VMA3. + * vma_next(vmi) will return VMA3. * In this case, just continue from VMA3. * * 2) VMA2 still exists: * - * find_vma(mm, 16k - 1) will return VMA2. - * Iterate the loop like the original one. + * vma_next(vmi) will return VMA3. + * In this case, just continue from VMA3. * * 3) No more VMAs can be found: * - * find_vma(mm, 16k - 1) will return NULL. + * vma_next(vmi) will return NULL. * No more things to do, just break. * * 4) (last_vma_end - 1) is the middle of a vma (VMA'): * - * find_vma(mm, 16k - 1) will return VMA' whose range + * vma_next(vmi) will return VMA' whose range * contains last_vma_end. * Iterate VMA' from last_vma_end. */ - vma = mas_find(&mas, ULONG_MAX); + vma = vma_next(&vmi); /* Case 3 above */ if (!vma) break; - /* Case 1 above */ + /* Case 1 and 2 above */ if (vma->vm_start >= last_vma_end) continue; @@ -982,8 +982,7 @@ static int show_smaps_rollup(struct seq_file *m, void *v) if (vma->vm_end > last_vma_end) smap_gather_stats(vma, &mss, last_vma_end); } - /* Case 2 above */ - } while ((vma = mas_find(&mas, ULONG_MAX)) != NULL); + } for_each_vma(vmi, vma); empty_set: show_vma_header_prefix(m, vma_start, last_vma_end, 0, 0, 0, 0); @@ -1279,7 +1278,7 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf, return -ESRCH; mm = get_task_mm(task); if (mm) { - MA_STATE(mas, &mm->mm_mt, 0, 0); + VMA_ITERATOR(vmi, mm, 0); struct mmu_notifier_range range; struct clear_refs_private cp = { .type = type, @@ -1299,7 +1298,7 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf, } if (type == CLEAR_REFS_SOFT_DIRTY) { - mas_for_each(&mas, vma, ULONG_MAX) { + for_each_vma(vmi, vma) { if (!(vma->vm_flags & VM_SOFTDIRTY)) continue; vma->vm_flags &= ~VM_SOFTDIRTY;