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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: linux-mm@kvack.org, akpm@linux-foundation.org
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	npiggin@gmail.com, kaleshsingh@google.com,
	joel@joelfernandes.org,
	"Kirill A . Shutemov" <kirill@shutemov.name>,
	linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v7 07/11] mm/mremap: Use pmd/pud_poplulate to update page table entries
Date: Mon,  7 Jun 2021 11:21:27 +0530	[thread overview]
Message-ID: <20210607055131.156184-8-aneesh.kumar@linux.ibm.com> (raw)
In-Reply-To: <20210607055131.156184-1-aneesh.kumar@linux.ibm.com>

pmd/pud_populate is the right interface to be used to set the respective
page table entries. Some architectures like ppc64 do assume that set_pmd/pud_at
can only be used to set a hugepage PTE. Since we are not setting up a hugepage
PTE here, use the pmd/pud_populate interface.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
---
 mm/mremap.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/mm/mremap.c b/mm/mremap.c
index 795a7d628b53..dacfa9111ab1 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -26,6 +26,7 @@
 
 #include <asm/cacheflush.h>
 #include <asm/tlbflush.h>
+#include <asm/pgalloc.h>
 
 #include "internal.h"
 
@@ -258,8 +259,7 @@ static bool move_normal_pmd(struct vm_area_struct *vma, unsigned long old_addr,
 
 	VM_BUG_ON(!pmd_none(*new_pmd));
 
-	/* Set the new pmd */
-	set_pmd_at(mm, new_addr, new_pmd, pmd);
+	pmd_populate(mm, new_pmd, pmd_pgtable(pmd));
 	flush_tlb_range(vma, old_addr, old_addr + PMD_SIZE);
 	if (new_ptl != old_ptl)
 		spin_unlock(new_ptl);
@@ -306,8 +306,7 @@ static bool move_normal_pud(struct vm_area_struct *vma, unsigned long old_addr,
 
 	VM_BUG_ON(!pud_none(*new_pud));
 
-	/* Set the new pud */
-	set_pud_at(mm, new_addr, new_pud, pud);
+	pud_populate(mm, new_pud, (pmd_t *)pud_page_vaddr(pud));
 	flush_tlb_range(vma, old_addr, old_addr + PUD_SIZE);
 	if (new_ptl != old_ptl)
 		spin_unlock(new_ptl);
-- 
2.31.1


  parent reply	other threads:[~2021-06-07  5:55 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-07  5:51 [PATCH v7 00/11] Speedup mremap on ppc64 Aneesh Kumar K.V
2021-06-07  5:51 ` [PATCH v7 01/11] mm/mremap: Fix race between MOVE_PMD mremap and pageout Aneesh Kumar K.V
2021-06-08  0:06   ` Hugh Dickins
2021-06-08  7:52     ` Aneesh Kumar K.V
2021-06-08  9:42       ` Kirill A. Shutemov
2021-06-08 11:17         ` Aneesh Kumar K.V
2021-06-08 12:05           ` Kirill A. Shutemov
2021-06-08 20:39       ` Hugh Dickins
2021-06-07  5:51 ` [PATCH v7 02/11] mm/mremap: Fix race between MOVE_PUD " Aneesh Kumar K.V
2021-06-14 14:55   ` [mm/mremap] ecf8443e51: vm-scalability.throughput -29.4% regression kernel test robot
2021-06-14 14:58     ` Linus Torvalds
2021-06-14 16:08     ` Aneesh Kumar K.V
2021-06-17  2:38       ` [LKP] " Liu, Yujie
2021-06-07  5:51 ` [PATCH v7 03/11] selftest/mremap_test: Update the test to handle pagesize other than 4K Aneesh Kumar K.V
2021-06-07  5:51 ` [PATCH v7 04/11] selftest/mremap_test: Avoid crash with static build Aneesh Kumar K.V
2021-06-07  5:51 ` [PATCH v7 05/11] mm/mremap: Convert huge PUD move to separate helper Aneesh Kumar K.V
2021-06-07  5:51 ` [PATCH v7 06/11] mm/mremap: Don't enable optimized PUD move if page table levels is 2 Aneesh Kumar K.V
2021-06-07  5:51 ` Aneesh Kumar K.V [this message]
2021-06-07  5:51 ` [PATCH v7 08/11] powerpc/mm/book3s64: Fix possible build error Aneesh Kumar K.V
2021-06-07  5:51 ` [PATCH v7 09/11] mm/mremap: Allow arch runtime override Aneesh Kumar K.V
2021-06-07  5:51 ` [PATCH v7 10/11] powerpc/book3s64/mm: Update flush_tlb_range to flush page walk cache Aneesh Kumar K.V
2021-06-07  5:51 ` [PATCH v7 11/11] powerpc/mm: Enable HAVE_MOVE_PMD support Aneesh Kumar K.V
2021-06-07 10:10 ` [PATCH v7 00/11] Speedup mremap on ppc64 Nick Piggin
2021-06-08  4:39   ` Aneesh Kumar K.V
2021-06-08  5:03     ` Nicholas Piggin
2021-06-08 17:10   ` Linus Torvalds
2021-06-16  1:44     ` Nicholas Piggin

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