From: Michel Lespinasse <walken@google.com>
To: Peter Zijlstra <peterz@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
Laurent Dufour <ldufour@linux.ibm.com>,
Vlastimil Babka <vbabka@suse.cz>,
Matthew Wilcox <willy@infradead.org>,
"Liam R . Howlett" <Liam.Howlett@oracle.com>,
Jerome Glisse <jglisse@redhat.com>,
Davidlohr Bueso <dave@stgolabs.net>,
David Rientjes <rientjes@google.com>
Cc: linux-mm <linux-mm@kvack.org>, Michel Lespinasse <walken@google.com>
Subject: [RFC PATCH 20/24] x86 fault handler: extend range locking to supported file vmas
Date: Mon, 24 Feb 2020 12:30:53 -0800 [thread overview]
Message-ID: <20200224203057.162467-21-walken@google.com> (raw)
In-Reply-To: <20200224203057.162467-1-walken@google.com>
Change the fault handler to operate with a fine grained range lock when
operating on any of the explicitly supported file types.
Signed-off-by: Michel Lespinasse <walken@google.com>
---
arch/x86/mm/fault.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git arch/x86/mm/fault.c arch/x86/mm/fault.c
index 1e37284d373c..ca30952896e1 100644
--- arch/x86/mm/fault.c
+++ arch/x86/mm/fault.c
@@ -1456,9 +1456,9 @@ void do_user_addr_fault(struct pt_regs *regs,
/*
* Fall back to locking the entire MM
- * when operating on file vma.
+ * when the vm_ops do not support fine grained range locking.
*/
- if (!vma_is_anonymous(vma)) {
+ if (!vma_is_anonymous(vma) && !vma->vm_ops->fine_grained) {
mm_read_range_unlock(mm, range);
range = mm_coarse_lock_range();
goto retry;
--
2.25.0.341.g760bfbb309-goog
next prev parent reply other threads:[~2020-02-24 20:31 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-24 20:30 [RFC PATCH 00/24] Fine grained MM locking Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 01/24] MM locking API: initial implementation as rwsem wrappers Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 02/24] MM locking API: use coccinelle to convert mmap_sem rwsem call sites Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 03/24] MM locking API: manual conversion of mmap_sem call sites missed by coccinelle Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 04/24] MM locking API: add range arguments Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 05/24] MM locking API: allow for sleeping during unlock Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 06/24] MM locking API: implement fine grained range locks Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 07/24] mm/memory: add range field to struct vm_fault Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 08/24] mm/memory: allow specifying MM lock range to handle_mm_fault() Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 09/24] do_swap_page: use the vmf->range field when dropping mmap_sem Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 10/24] handle_userfault: " Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 11/24] x86 fault handler: merge bad_area() functions Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 12/24] x86 fault handler: use an explicit MM lock range Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 13/24] mm/memory: add prepare_mm_fault() function Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 14/24] mm/swap_state: disable swap vma readahead Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 15/24] x86 fault handler: use a pseudo-vma when operating on anonymous vmas Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 16/24] MM locking API: add vma locking API Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 17/24] x86 fault handler: implement range locking Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 18/24] shared file mappings: use the vmf->range field when dropping mmap_sem Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 19/24] mm: add field to annotate vm_operations that support range locking Michel Lespinasse
2020-02-24 20:30 ` Michel Lespinasse [this message]
2020-02-24 20:30 ` [RFC PATCH 21/24] do_mmap: add locked argument Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 22/24] do_mmap: implement " Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 23/24] do_mmap: use locked=false in vm_mmap_pgoff() and aio_setup_ring() Michel Lespinasse
2020-02-24 20:30 ` [RFC PATCH 24/24] do_mmap: implement easiest cases of fine grained locking Michel Lespinasse
2022-03-20 22:08 ` [RFC PATCH 00/24] Fine grained MM locking Barry Song
2022-03-20 23:14 ` Matthew Wilcox
2022-03-21 0:20 ` Barry Song
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