Module Name:src
Committed By: cherry
Date: Tue May 6 04:26:24 UTC 2014
Modified Files:
src/sys/arch/x86/x86: pmap.c
src/sys/arch/xen/include: xenpmap.h
src/sys/arch/xen/x86: x86_xpmap.c
Log Message:
Use the hypervisor to copy/zero pages. This saves us the extra overheads
of setting up temporary kernel mapping/unmapping.
riz@ reports savings of about 2s on a 120s kernel build.
This commit seems to have broken the ability to boot NetBSD under at
least some hypervisors. My VPS at prgmr.com boots fine with a kernel
from just before this change. However, with this commit, the following
panic occurs:
...
xc_dom_bzimageloader.c:350: panic: xc_dom_probe_bzimage_kernel: kernel is not a
bzImage
close blk: backend=/local/domain/0/backend/vbd/550/51712 node=device/vbd/51712
close blk: backend=/local/domain/0/backend/vbd/550/51776 node=device/vbd/51776
close blk: backend=/local/domain/0/backend/vbd/550/51792 node=device/vbd/51792
panic: xen_pagezero
(Complete log from the boot is available.)
I have no control over the DOM0 environment, so I'm not sure of exactly
which hypervisor is running.
(I suppose the problem could also be a boot-loader problem, so if it
matters, this is with Grub 0.97)
The problem is not time-critical, since I have installed a 6.1.4_PATCH
without any problem. But perhaps we might want to revert this change
for now...
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| Paul Goyette | PGP Key fingerprint: | E-mail addresses: |
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| Kernel Developer | | pgoyette at netbsd.org |
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