Subject: linux-image-2.6.26-1-686: Kernel will not boot in Virtual PC Package: linux-image-2.6.26-1-686 Version: 2.6.26-5 Severity: important Tags: patch
*** Please type your report below this line *** Kernel will not boot in Virtual PC due to introduction of multi-byte nops. Problem has been fixed upstream for 2.6.27. I am including patch to fix problem in 2.6.26-1-686. -- Package-specific info: -- System Information: Debian Release: lenny/sid APT prefers testing APT policy: (500, 'testing') Architecture: i386 (i686) Kernel: Linux 2.6.27-rc8.local2 (SMP w/1 CPU core) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Versions of packages linux-image-2.6.26-1-686 depends on: ii debconf [debconf-2.0] 1.5.22 Debian configuration management sy ii initramfs-tools [linux-initra 0.92j tools for generating an initramfs ii module-init-tools 3.4-1 tools for managing Linux kernel mo Versions of packages linux-image-2.6.26-1-686 recommends: ii libc6-i686 2.7-13 GNU C Library: Shared libraries [i Versions of packages linux-image-2.6.26-1-686 suggests: ii grub 0.97-47 GRand Unified Bootloader (Legacy v pn linux-doc-2.6.26 <none> (no description available) -- debconf information: linux-image-2.6.26-1-686/preinst/abort-overwrite-2.6.26-1-686: shared/kernel-image/really-run-bootloader: true linux-image-2.6.26-1-686/postinst/bootloader-error-2.6.26-1-686: linux-image-2.6.26-1-686/postinst/depmod-error-initrd-2.6.26-1-686: false linux-image-2.6.26-1-686/prerm/removing-running-kernel-2.6.26-1-686: true linux-image-2.6.26-1-686/postinst/old-system-map-link-2.6.26-1-686: true linux-image-2.6.26-1-686/preinst/abort-install-2.6.26-1-686: linux-image-2.6.26-1-686/preinst/lilo-has-ramdisk: linux-image-2.6.26-1-686/preinst/bootloader-initrd-2.6.26-1-686: true linux-image-2.6.26-1-686/prerm/would-invalidate-boot-loader-2.6.26-1-686: true linux-image-2.6.26-1-686/preinst/elilo-initrd-2.6.26-1-686: true linux-image-2.6.26-1-686/postinst/kimage-is-a-directory: linux-image-2.6.26-1-686/postinst/old-dir-initrd-link-2.6.26-1-686: true linux-image-2.6.26-1-686/postinst/create-kimage-link-2.6.26-1-686: true linux-image-2.6.26-1-686/preinst/lilo-initrd-2.6.26-1-686: true linux-image-2.6.26-1-686/postinst/old-initrd-link-2.6.26-1-686: true linux-image-2.6.26-1-686/preinst/overwriting-modules-2.6.26-1-686: true linux-image-2.6.26-1-686/postinst/depmod-error-2.6.26-1-686: false linux-image-2.6.26-1-686/postinst/bootloader-test-error-2.6.26-1-686: linux-image-2.6.26-1-686/preinst/failed-to-move-modules-2.6.26-1-686: linux-image-2.6.26-1-686/preinst/initrd-2.6.26-1-686:
>From 14469a8dd23677921db5e7354a602c98d9c6300f Mon Sep 17 00:00:00 2001 From: Linus Torvalds <[EMAIL PROTECTED]> Date: Fri, 5 Sep 2008 09:30:14 -0700 Subject: [PATCH] x86: disable static NOPLs on 32 bits On 32-bit, at least the generic nops are fairly reasonable, but the default nops for 64-bit really look pretty sad, and the P6 nops really do look better. So I would suggest perhaps moving the static P6 nop selection into the CONFIG_X86_64 thing. The alternative is to just get rid of that static nop selection, and just have two cases: 32-bit and 64-bit, and just pick obviously safe cases for them. Signed-off-by: H. Peter Anvin <[EMAIL PROTECTED]> --- arch/x86/Kconfig.cpu | 13 ++++++++----- 1 files changed, 8 insertions(+), 5 deletions(-) diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu index 2c518fb..b225219 100644 --- a/arch/x86/Kconfig.cpu +++ b/arch/x86/Kconfig.cpu @@ -382,14 +382,17 @@ config X86_OOSTORE # P6_NOPs are a relatively minor optimization that require a family >= # 6 processor, except that it is broken on certain VIA chips. # Furthermore, AMD chips prefer a totally different sequence of NOPs -# (which work on all CPUs). As a result, disallow these if we're -# compiling X86_GENERIC but not X86_64 (these NOPs do work on all -# x86-64 capable chips); the list of processors in the right-hand clause -# are the cores that benefit from this optimization. +# (which work on all CPUs). In addition, it looks like Virtual PC +# does not understand them. +# +# As a result, disallow these if we're not compiling for X86_64 (these +# NOPs do work on all x86-64 capable chips); the list of processors in +# the right-hand clause are the cores that benefit from this optimization. # config X86_P6_NOP def_bool y - depends on (X86_64 || !X86_GENERIC) && (M686 || MPENTIUMII || MPENTIUMIII || MPENTIUMM || MCORE2 || MPENTIUM4 || MPSC) + depends on X86_64 + depends on (MCORE2 || MPENTIUM4 || MPSC) config X86_TSC def_bool y -- 1.6.0.2.GIT
