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Howlett" To: Andrew Morton Cc: maple-tree@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Suren Baghdasaryan , "Liam R. Howlett" Subject: [PATCH v3 09/15] mm: Use vma_iter_clear_gfp() in nommu Date: Mon, 24 Jul 2023 14:31:51 -0400 Message-Id: <20230724183157.3939892-10-Liam.Howlett@oracle.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230724183157.3939892-1-Liam.Howlett@oracle.com> References: <20230724183157.3939892-1-Liam.Howlett@oracle.com> X-ClientProxiedBy: BL1PR13CA0187.namprd13.prod.outlook.com (2603:10b6:208:2be::12) To SN6PR10MB3022.namprd10.prod.outlook.com (2603:10b6:805:d8::25) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN6PR10MB3022:EE_|CY8PR10MB6609:EE_ X-MS-Office365-Filtering-Correlation-Id: 0af05131-b7c4-4b32-b1eb-08db8c745c56 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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7mPD/HL+QpTQdDPI/HfH3IZF5Ag4PD2cF+M+PkjJ23NJ+ahxe+pY6iw1cg0oRmLbcxDuMRLfK7wuha6mgwb42IN/kz80HaxKLoXWbkuoUkpbAjxFAzSeK7GDjjM7M552DVa9nGEwSe//RXUDqHR5h3KHpcr4EVIkMLRe1o11BTjWQ4fFrv9ccVR7QUQT+8Q8IAd10rCSqGGaFS/JsGjG+M3MGwM/ZrPy8nRESX7SOFfXgFrJTy8snRN6kkEndjYLNatgRKuQzqdN3YDTossjdU9YDNHMH6iZrc9RqFyQR0XqPSL8U6gHbdi24G9MRD0WYTlJRjHrsUFc/wayMWPZcOYUMnOo6NLd+UmJfHU4N6eDsMn2zbmo7FOPC5BBjoogFZS0q2JC9yzQ4TB0m3lY+wDOs+SyXKFgCtmjErM5iIucD/iY= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Move the definition of vma_iter_clear_gfp() from mmap.c to internal.h so it can be used in the nommu code. This will reduce node preallocations in nommu. Signed-off-by: Liam R. Howlett --- mm/internal.h | 12 ++++++++++++ mm/mmap.c | 12 ------------ mm/nommu.c | 12 ++++-------- 3 files changed, 16 insertions(+), 20 deletions(-) diff --git a/mm/internal.h b/mm/internal.h index 65f646c2ccf3..2f35c0ef7b7f 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -1064,6 +1064,18 @@ static inline void vma_iter_clear(struct vma_iterator *vmi, mas_store_prealloc(&vmi->mas, NULL); } +static inline int vma_iter_clear_gfp(struct vma_iterator *vmi, + unsigned long start, unsigned long end, gfp_t gfp) +{ + vmi->mas.index = start; + vmi->mas.last = end - 1; + mas_store_gfp(&vmi->mas, NULL, gfp); + if (unlikely(mas_is_err(&vmi->mas))) + return -ENOMEM; + + return 0; +} + static inline struct vm_area_struct *vma_iter_load(struct vma_iterator *vmi) { return mas_walk(&vmi->mas); diff --git a/mm/mmap.c b/mm/mmap.c index 625d7411d5a0..d09f11a9ad85 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -154,18 +154,6 @@ static inline struct vm_area_struct *vma_prev_limit(struct vma_iterator *vmi, return mas_prev(&vmi->mas, min); } -static inline int vma_iter_clear_gfp(struct vma_iterator *vmi, - unsigned long start, unsigned long end, gfp_t gfp) -{ - vmi->mas.index = start; - vmi->mas.last = end - 1; - mas_store_gfp(&vmi->mas, NULL, gfp); - if (unlikely(mas_is_err(&vmi->mas))) - return -ENOMEM; - - return 0; -} - /* * check_brk_limits() - Use platform specific check of range & verify mlock * limits. diff --git a/mm/nommu.c b/mm/nommu.c index 9826f6101a05..418cc0669c1f 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -1396,17 +1396,13 @@ static int vmi_shrink_vma(struct vma_iterator *vmi, /* adjust the VMA's pointers, which may reposition it in the MM's tree * and list */ - if (vma_iter_prealloc(vmi)) { - pr_warn("Allocation of vma tree for process %d failed\n", - current->pid); - return -ENOMEM; - } - if (from > vma->vm_start) { - vma_iter_clear(vmi, from, vma->vm_end); + if (vma_iter_clear_gfp(vmi, from, vma->vm_end, GFP_KERNEL)) + return -ENOMEM; vma->vm_end = from; } else { - vma_iter_clear(vmi, vma->vm_start, to); + if (vma_iter_clear_gfp(vmi, vma->vm_start, to, GFP_KERNEL)) + return -ENOMEM; vma->vm_start = to; }