From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>
To: maple-tree@lists.infradead.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Cc: Andrew Morton <akpm@google.com>, Song Liu <songliubraving@fb.com>,
Davidlohr Bueso <dave@stgolabs.net>,
"Paul E . McKenney" <paulmck@kernel.org>,
Matthew Wilcox <willy@infradead.org>,
Jerome Glisse <jglisse@redhat.com>,
David Rientjes <rientjes@google.com>,
Axel Rasmussen <axelrasmussen@google.com>,
Suren Baghdasaryan <surenb@google.com>,
Vlastimil Babka <vbabka@suse.cz>
Subject: [PATCH 13/28] mm/gup: Expose mm_populate_vma() for use when the vma is known
Date: Thu, 10 Dec 2020 12:03:47 -0500 [thread overview]
Message-ID: <20201210170402.3468568-14-Liam.Howlett@Oracle.com> (raw)
In-Reply-To: <20201210170402.3468568-1-Liam.Howlett@Oracle.com>
When a vma is known, avoid calling mm_populate to search for the vma to
populate.
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---
include/linux/mm.h | 4 ++++
mm/gup.c | 20 ++++++++++++++++++++
2 files changed, 24 insertions(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 1bfa2ee41187d..6cc8825f26414 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2587,8 +2587,12 @@ static inline void mm_populate(unsigned long addr, unsigned long len)
/* Ignore errors */
(void) __mm_populate(addr, len, 1);
}
+extern void mm_populate_vma(struct vm_area_struct *vma, unsigned long start,
+ unsigned long end);
#else
static inline void mm_populate(unsigned long addr, unsigned long len) {}
+void mm_populate_vma(struct vm_area_struct *vma, unsigned long start,
+ unsigned long end) {}
#endif
/* These take the mm semaphore themselves */
diff --git a/mm/gup.c b/mm/gup.c
index 102877ed77a4b..522f8fd491ead 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1431,6 +1431,26 @@ long populate_vma_page_range(struct vm_area_struct *vma,
NULL, NULL, locked);
}
+/*
+ * mm_populate_vma() - Populate a single range in a single vma.
+ * @vma: The vma to populate.
+ * @start: The start address to populate
+ * @end: The end address to stop populating
+ *
+ * Note: Ignores errors.
+ */
+void mm_populate_vma(struct vm_area_struct *vma, unsigned long start,
+ unsigned long end)
+{
+ struct mm_struct *mm = current->mm;
+ int locked = 1;
+
+ mmap_read_lock(mm);
+ populate_vma_page_range(vma, start, end, &locked);
+ if (locked)
+ mmap_read_unlock(mm);
+}
+
/*
* __mm_populate - populate and/or mlock pages within a range of address space.
*
--
2.28.0
next prev parent reply other threads:[~2020-12-10 18:22 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-10 17:03 [PATCH 00/28] RFC mm: Introducing the Maple Tree Liam R. Howlett
2020-12-10 17:03 ` [PATCH 01/28] radix tree test suite: Enhancements for " Liam R. Howlett
2020-12-10 17:03 ` [PATCH 02/28] radix tree test suite: Add support for fallthrough attribute Liam R. Howlett
2020-12-10 17:03 ` [PATCH 03/28] radix tree test suite: Add support for kmem_cache_free_bulk Liam R. Howlett
2020-12-10 17:03 ` [PATCH 04/28] radix tree test suite: Add keme_cache_alloc_bulk() support Liam R. Howlett
2020-12-10 17:03 ` [PATCH 05/28] Maple Tree: Add new data structure Liam R. Howlett
2020-12-10 17:03 ` [PATCH 06/28] mm: Start tracking VMAs with maple tree Liam R. Howlett
2020-12-11 19:30 ` kernel test robot
2020-12-10 17:03 ` [PATCH 07/28] mm/mmap: Introduce unlock_range() for code cleanup Liam R. Howlett
2020-12-10 17:03 ` [PATCH 08/28] mm/mmap: Change find_vma() to use the maple tree Liam R. Howlett
2020-12-10 17:03 ` [PATCH 09/28] mm/mmap: Change find_vma_prev() to use " Liam R. Howlett
2020-12-10 17:03 ` [PATCH 10/28] mm/mmap: Change unmapped_area and unmapped_area_topdown " Liam R. Howlett
2020-12-10 17:03 ` [PATCH 11/28] kernel/fork: Convert dup_mmap " Liam R. Howlett
2020-12-10 17:03 ` [PATCH 12/28] mm: Remove rb tree Liam R. Howlett
2020-12-10 17:03 ` Liam R. Howlett [this message]
2020-12-10 21:03 ` [PATCH 13/28] mm/gup: Expose mm_populate_vma() for use when the vma is known kernel test robot
2020-12-10 17:03 ` [PATCH 14/28] mm/mmap: Change do_brk_flags() to expand existing VMA and add do_brk_munmap() Liam R. Howlett
2020-12-10 17:03 ` [PATCH 15/28] mm/mmap: Change vm_brk_flags() to use mm_populate_vma() Liam R. Howlett
2020-12-10 17:03 ` [PATCH 16/28] mm: Move find_vma_intersection to mmap.c and change implementation to maple tree Liam R. Howlett
2020-12-10 17:03 ` [PATCH 17/28] mm/mmap: Change mmap_region to use maple tree state Liam R. Howlett
2020-12-10 17:03 ` [PATCH 18/28] mm/mmap: Drop munmap_vma_range() Liam R. Howlett
2020-12-10 17:03 ` [PATCH 19/28] mm: Remove vmacache Liam R. Howlett
2020-12-10 17:03 ` [PATCH 20/28] mm/mmap: Change __do_munmap() to avoid unnecessary lookups Liam R. Howlett
2020-12-10 17:03 ` [PATCH 21/28] mm/mmap: Change __do_munmap() to use a ma_state Liam R. Howlett
2020-12-10 17:03 ` [PATCH 22/28] mm/mmap: Move mmap_region() below do_munmap() Liam R. Howlett
2020-12-10 17:03 ` [PATCH 23/28] mm/mmap: Add do_mas_munmap() and wraper for __do_munmap() Liam R. Howlett
2020-12-10 17:03 ` [PATCH 24/28] mmap: Use find_vma_intersection in do_mmap() for overlap Liam R. Howlett
2020-12-10 17:03 ` [PATCH 25/28] mmap: Remove __do_munmap() in favour of do_mas_munmap() Liam R. Howlett
2020-12-10 17:04 ` [PATCH 26/28] mm/mmap: Change do_brk_munmap() to use do_mas_align_munmap() Liam R. Howlett
2020-12-10 17:04 ` [PATCH 27/28] mmap: Update count_vma_pages_range() to only use one ma_state Liam R. Howlett
2020-12-10 17:04 ` [PATCH 28/28] mmap: make remove_vma_list() inline Liam R. Howlett
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