Thread (8 messages) 8 messages, 3 authors, 2021-11-17

Re: [RFC 1/3] mm: ptep_clear() page table helper

From: Pasha Tatashin <pasha.tatashin@soleen.com>
Date: 2021-11-17 16:44:41
Also in: linux-mm, lkml

On Wed, Nov 17, 2021 at 3:52 AM Anshuman Khandual
[off-list ref] wrote:


On 11/17/21 3:30 AM, Pasha Tatashin wrote:
quoted
diff --git a/Documentation/vm/arch_pgtable_helpers.rst b/Documentation/vm/arch_pgtable_helpers.rst
index 552567d863b8..fbe06ec75370 100644
--- a/Documentation/vm/arch_pgtable_helpers.rst
+++ b/Documentation/vm/arch_pgtable_helpers.rst
@@ -66,9 +66,11 @@ PTE Page Table Helpers
 +---------------------------+--------------------------------------------------+
 | pte_mknotpresent          | Invalidates a mapped PTE                         |
 +---------------------------+--------------------------------------------------+
-| ptep_get_and_clear        | Clears a PTE                                     |
+| ptep_clear                | Clears a PTE                                     |
 +---------------------------+--------------------------------------------------+
-| ptep_get_and_clear_full   | Clears a PTE                                     |
+| ptep_get_and_clear        | Clears and returns PTE                           |
++---------------------------+--------------------------------------------------+
+| ptep_get_and_clear_full   | Clears and returns PTE (batched PTE unmap)       |
 +---------------------------+--------------------------------------------------+
 | ptep_test_and_clear_young | Clears young from a PTE                          |
 +---------------------------+--------------------------------------------------+
Just curious. This does not have a corresponding change in mm/debug_vm_pgtable.c ?
You are right, I need to replace it in mm/debug_vm_pgtable.c as well.
I will do it in the next version.

Thanks,
Pasha
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