From: Baoquan He <bhe@redhat.com>
To: linux-kernel@vger.kernel.org, akpm@linux-foundation.org,
dave.hansen@intel.com, pagupta@redhat.com
Cc: linux-mm@kvack.org, kirill.shutemov@linux.intel.com,
Baoquan He <bhe@redhat.com>
Subject: [PATCH v4 1/4] mm/sparse: Add a static variable nr_present_sections
Date: Mon, 21 May 2018 18:15:52 +0800 [thread overview]
Message-ID: <20180521101555.25610-2-bhe@redhat.com> (raw)
In-Reply-To: <20180521101555.25610-1-bhe@redhat.com>
It's used to record how many memory sections are marked as present
during system boot up, and will be used in the later patch.
Signed-off-by: Baoquan He <bhe@redhat.com>
---
mm/sparse.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/mm/sparse.c b/mm/sparse.c
index 62eef264a7bd..48cf7b7982e2 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -202,6 +202,12 @@ static inline int next_present_section_nr(int section_nr)
(section_nr <= __highest_present_section_nr)); \
section_nr = next_present_section_nr(section_nr))
+/*
+ * Record how many memory sections are marked as present
+ * during system bootup.
+ */
+static int __initdata nr_present_sections;
+
/* Record a memory area against a node. */
void __init memory_present(int nid, unsigned long start, unsigned long end)
{
@@ -231,6 +237,7 @@ void __init memory_present(int nid, unsigned long start, unsigned long end)
ms->section_mem_map = sparse_encode_early_nid(nid) |
SECTION_IS_ONLINE;
section_mark_present(ms);
+ nr_present_sections++;
}
}
}
--
2.13.6
next prev parent reply other threads:[~2018-05-21 10:16 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-21 10:15 [PATCH v4 0/4] mm/sparse: Optimize memmap allocation during sparse_init() Baoquan He
2018-05-21 10:15 ` Baoquan He [this message]
2018-06-07 22:46 ` [PATCH v4 1/4] mm/sparse: Add a static variable nr_present_sections Dave Hansen
2018-05-21 10:15 ` [PATCH v4 2/4] mm/sparsemem: Defer the ms->section_mem_map clearing Baoquan He
2018-06-07 22:47 ` Dave Hansen
2018-05-21 10:15 ` [PATCH v4 3/4] mm/sparse: Add a new parameter 'data_unit_size' for alloc_usemap_and_memmap Baoquan He
2018-06-07 22:48 ` Dave Hansen
2018-06-08 6:27 ` Baoquan He
2018-06-08 14:20 ` Dave Hansen
2018-06-08 15:17 ` Baoquan He
2018-06-08 16:13 ` Dave Hansen
2018-06-10 23:32 ` Baoquan He
2018-05-21 10:15 ` [PATCH v4 4/4] mm/sparse: Optimize memmap allocation during sparse_init() Baoquan He
2018-06-07 22:46 ` Dave Hansen
2018-06-08 7:28 ` Baoquan He
2018-06-08 7:41 ` Baoquan He
2018-06-07 22:17 ` [PATCH v4 0/4] " Andrew Morton
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