[Xen-devel] xen-3.0.3-testing-install-x86_32 dom0 boot failure

[Richard Miller <9xen@xxxxxxxxxxxx>]

Error message is:

        VFS: Cannot open root device "hda1" or unknown-block(0,0)
        Please append a correct "root=" boot option
        Kernel panic - not syncing: VFS: Unable to mount root fs on 
unknown-block(0,0)

The cause seems to be that the kernel was configured with IDE support
(CONFIG_BLK_DEV_IDE=y) but not IDE disk support (CONFIG_BLK_DEV_IDEDISK=m).

To make life easier for people with root filesystems on IDE disks (not
uncommon, I think) may I suggest this patch?

-- Richard Miller

# HG changeset patch
# User miller@vt310
# Node ID 0273fa71dff31a72ccc7501203309ed62001bf2c
# Parent  000aa9510e5587f869a743121dd06ad2e0f21a99
Define CONFIG_BLK_DEV_IDEDISK=y for IDE root disk support.

diff -r 000aa9510e55 -r 0273fa71dff3 buildconfigs/linux-defconfig_xen_x86_32
--- a/buildconfigs/linux-defconfig_xen_x86_32   Wed Sep 27 14:30:36 2006 +0100
+++ b/buildconfigs/linux-defconfig_xen_x86_32   Tue Oct 03 11:38:38 2006 +0100
@@ -986,7 +986,7 @@ CONFIG_BLK_DEV_IDE=y
 #
 # CONFIG_BLK_DEV_IDE_SATA is not set
 # CONFIG_BLK_DEV_HD_IDE is not set
-CONFIG_BLK_DEV_IDEDISK=m
+CONFIG_BLK_DEV_IDEDISK=y
 CONFIG_IDEDISK_MULTI_MODE=y
 CONFIG_BLK_DEV_IDECS=m
 CONFIG_BLK_DEV_IDECD=m
diff -r 000aa9510e55 -r 0273fa71dff3 buildconfigs/linux-defconfig_xen_x86_64
--- a/buildconfigs/linux-defconfig_xen_x86_64   Wed Sep 27 14:30:36 2006 +0100
+++ b/buildconfigs/linux-defconfig_xen_x86_64   Tue Oct 03 11:38:38 2006 +0100
@@ -936,7 +936,7 @@ CONFIG_BLK_DEV_IDE=y
 #
 # CONFIG_BLK_DEV_IDE_SATA is not set
 # CONFIG_BLK_DEV_HD_IDE is not set
-CONFIG_BLK_DEV_IDEDISK=m
+CONFIG_BLK_DEV_IDEDISK=y
 CONFIG_IDEDISK_MULTI_MODE=y
 # CONFIG_BLK_DEV_IDECS is not set
 CONFIG_BLK_DEV_IDECD=m

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