linux-kernel - [Patch 002/005](memory hotplug) align memmap to page size

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 07 Apr 2008 21:46:19 +0900
From:	Yasunori Goto <y-goto@...fujitsu.com>
To:	Badari Pulavarty <pbadari@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Linux Kernel ML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>, Yinghai Lu <yhlu.kernel@...il.com>
Subject: [Patch 002/005](memory hotplug) align memmap to page size


To free memmap easier, this patch aligns it to page size.
Bootmem allocater may mix some objects in one pages.
It's not good for freeing memmap of memory hot-remove.


Signed-off-by: Yasunori Goto <y-goto@...fujitsu.com>

---
 mm/sparse.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: current/mm/sparse.c
===================================================================
--- current.orig/mm/sparse.c	2008-04-07 19:18:50.000000000 +0900
+++ current/mm/sparse.c	2008-04-07 20:08:13.000000000 +0900
@@ -265,8 +265,8 @@
 	if (map)
 		return map;
 
-	map = alloc_bootmem_node(NODE_DATA(nid),
-			sizeof(struct page) * PAGES_PER_SECTION);
+	map = alloc_bootmem_pages_node(NODE_DATA(nid),
+		       PAGE_ALIGN(sizeof(struct page) * PAGES_PER_SECTION));
 	return map;
 }
 #endif /* !CONFIG_SPARSEMEM_VMEMMAP */

-- 
Yasunori Goto 


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/