* [merged] mm-sparsec-wrong-allocation-for-mem_section.patch removed from -mm tree
@ 2018-01-12 21:44 akpm
0 siblings, 0 replies; only message in thread
From: akpm @ 2018-01-12 21:44 UTC (permalink / raw)
To: ats-kumagai, bhe, dyoung, kirill.shutemov, luto, mingo,
mm-commits, peterz, stable, tglx
The patch titled
Subject: mm/sparse.c: wrong allocation for mem_section
has been removed from the -mm tree. Its filename was
mm-sparsec-wrong-allocation-for-mem_section.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Baoquan He <bhe@redhat.com>
Subject: mm/sparse.c: wrong allocation for mem_section
In 83e3c48729 ("mm/sparsemem: Allocate mem_section at runtime for CONFIG_SPARSEMEM_EXTREME=y") mem_section is allocated at runtime to save memory. While it allocates
the first dimension of array with sizeof(struct mem_section). It costs
extra memory, should be sizeof(struct mem_section*).
Fix it.
Link: http://lkml.kernel.org/r/1513932498-20350-1-git-send-email-bhe@redhat.com
Fixes: 83e3c48729 ("mm/sparsemem: Allocate mem_section at runtime for CONFIG_SPARSEMEM_EXTREME=y")
Signed-off-by: Baoquan He <bhe@redhat.com>
Tested-by: Dave Young <dyoung@redhat.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Atsushi Kumagai <ats-kumagai@wm.jp.nec.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/sparse.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/sparse.c~mm-sparsec-wrong-allocation-for-mem_section mm/sparse.c
--- a/mm/sparse.c~mm-sparsec-wrong-allocation-for-mem_section
+++ a/mm/sparse.c
@@ -211,7 +211,7 @@ void __init memory_present(int nid, unsi
if (unlikely(!mem_section)) {
unsigned long size, align;
- size = sizeof(struct mem_section) * NR_SECTION_ROOTS;
+ size = sizeof(struct mem_section*) * NR_SECTION_ROOTS;
align = 1 << (INTERNODE_CACHE_SHIFT);
mem_section = memblock_virt_alloc(size, align);
}
_
Patches currently in -mm which might be from bhe@redhat.com are
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2018-01-12 21:44 [merged] mm-sparsec-wrong-allocation-for-mem_section.patch removed from -mm tree akpm
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