* [merged] mm-memory-remove-page-fault-assumption-of-compound-page-size.patch removed from -mm tree
@ 2020-10-16 20:48 akpm
0 siblings, 0 replies; only message in thread
From: akpm @ 2020-10-16 20:48 UTC (permalink / raw)
To: kirill.shutemov, mm-commits, willy, ying.huang
The patch titled
Subject: mm/memory: remove page fault assumption of compound page size
has been removed from the -mm tree. Its filename was
mm-memory-remove-page-fault-assumption-of-compound-page-size.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Subject: mm/memory: remove page fault assumption of compound page size
A compound page in the page cache will not necessarily be of PMD size,
so check explicitly.
[willy@infradead.org: fix remove page fault assumption of compound page size]
Link: https://lkml.kernel.org/r/20201001152259.14932-1-willy@infradead.org
Link: https://lkml.kernel.org/r/20200908195539.25896-3-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/memory.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
--- a/mm/memory.c~mm-memory-remove-page-fault-assumption-of-compound-page-size
+++ a/mm/memory.c
@@ -3709,13 +3709,14 @@ static vm_fault_t do_set_pmd(struct vm_f
unsigned long haddr = vmf->address & HPAGE_PMD_MASK;
pmd_t entry;
int i;
- vm_fault_t ret;
+ vm_fault_t ret = VM_FAULT_FALLBACK;
if (!transhuge_vma_suitable(vma, haddr))
- return VM_FAULT_FALLBACK;
+ return ret;
- ret = VM_FAULT_FALLBACK;
page = compound_head(page);
+ if (compound_order(page) != HPAGE_PMD_ORDER)
+ return ret;
/*
* Archs like ppc64 need additonal space to store information
_
Patches currently in -mm which might be from willy@infradead.org are
mm-update-the-documentation-for-vfree.patch
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2020-10-16 20:48 [merged] mm-memory-remove-page-fault-assumption-of-compound-page-size.patch removed from -mm tree akpm
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