Re: [RFC v9 PATCH 00/21] memory-hotplug: hot-remove physical memory
From: Vasilis Liaskovitis <hidden>
Date: 2012-09-27 11:02:13
Also in:
linux-acpi, linux-mm, linux-s390, linux-sh, lkml, sparclinux
On Thu, Sep 27, 2012 at 06:06:30PM +0800, Wen Congyang wrote:
Please try the following patch: From a38ec678e0a9b48b252f457d7910b7527049dc43 Mon Sep 17 00:00:00 2001 From: Wen Congyang <redacted> Date: Thu, 27 Sep 2012 17:27:57 +0800 Subject: [PATCH] clear the memory to store page information
this solves the hot re-add problem for me. thanks for the quick solution. - Vasilis
quoted hunk ↗ jump to hunk
--- mm/sparse.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-)diff --git a/mm/sparse.c b/mm/sparse.c index ab9d755..36dda08 100644 --- a/mm/sparse.c +++ b/mm/sparse.c@@ -639,7 +639,6 @@ static struct page *__kmalloc_section_memmap(unsigned long nr_pages) got_map_page: ret = (struct page *)pfn_to_kaddr(page_to_pfn(page)); got_map_ptr: - memset(ret, 0, memmap_size); return ret; }@@ -761,6 +760,8 @@ int __meminit sparse_add_one_section(struct zone *zone, unsigned long start_pfn, goto out; } + memset(memmap, 0, sizeof(struct page) * nr_pages); + ms->section_mem_map |= SECTION_MARKED_PRESENT; ret = sparse_init_one_section(ms, section_nr, memmap, usemap);-- 1.7.1 Thanks Wen Congyang > > thanks, > > - Vasilis > > [1] https://lkml.org/lkml/2012/9/6/635 > [2] https://lkml.org/lkml/2012/9/11/542 > [3] https://lkml.org/lkml/2012/9/20/37 > [4] http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/98691 > > >