Messages in this thread | | | Date | Tue, 29 Apr 2008 23:38:32 -0700 | From | Andrew Morton <> | Subject | Re: sparc64 bootup regression... |
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On Tue, 29 Apr 2008 23:12:41 -0700 (PDT) David Miller <davem@davemloft.net> wrote:
> > This commit causes bootup failures on sparc64: > > commit 86f6dae1377523689bd8468fed2f2dd180fc0560 > Author: Yasunori Goto <y-goto@jp.fujitsu.com> > Date: Mon Apr 28 02:13:33 2008 -0700 > > memory hotplug: allocate usemap on the section with pgdat > > Usemaps are allocated on the section which has pgdat by this. > > Because usemap size is very small, many other sections usemaps are allocated > on only one page. If a section has usemap, it can't be removed until removing > other sections. This dependency is not desirable for memory removing. > > Pgdat has similar feature. When a section has pgdat area, it must be the last > section for removing on the node. So, if section A has pgdat and section B > has usemap for section A, Both sections can't be removed due to dependency > each other. > > To solve this issue, this patch collects usemap on same section with pgdat. > If other sections doesn't have any dependency, this section will be able to be > removed finally.
Thanks. Does a straightforward revert fix it? If so, we could do that while heads are being scratched.
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