Commit-ID: 73310a169aebe257efdd35a763cce1c7658f40c9
Gitweb: http://git.kernel.org/tip/73310a169aebe257efdd35a763cce1c7658f40c9
Author: "H. Peter Anvin" <hpa@xxxxxxxxxxxxxxx>
AuthorDate: Wed, 14 Jan 2009 11:28:35 -0800
Commit: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
CommitDate: Wed, 14 Jan 2009 11:28:35 -0800
init: make initrd/initramfs decompression failure a KERN_EMERG event
Impact: More consistent behaviour, avoid policy in the kernel
Upgrade/downgrade initrd/initramfs decompression failure from
inconsistently a panic or a KERN_ALERT message to a KERN_EMERG event.
It is, however, possible do design a system which can recover from
this (using the kernel builtin code and/or the internal initramfs),
which means this is policy, not a technical necessity.
A good way to handle this would be to have a panic-level=X option, to
force a panic on a printk above a certain level. That is a separate
patch, however.
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
---
init/do_mounts_rd.c | 3 ++-
init/initramfs.c | 11 +++++++----
2 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c
index 91d0cfc..027a402 100644
--- a/init/do_mounts_rd.c
+++ b/init/do_mounts_rd.c
@@ -83,7 +83,8 @@ identify_ramdisk_image(int fd, int start_block, decompress_fn *decompressor)
printk(KERN_NOTICE "RAMDISK: %s image found at block %d\n",
compress_name, start_block);
if (!*decompressor)
- printk(KERN_CRIT "RAMDISK: %s decompressor not configured!\n",
+ printk(KERN_EMERG
+ "RAMDISK: %s decompressor not configured!\n",
compress_name);
nblocks = 0;
goto done;
diff --git a/init/initramfs.c b/init/initramfs.c
index 9a7290e..7dcde7e 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -528,7 +528,7 @@ static int __init populate_rootfs(void)
char *err = unpack_to_rootfs(__initramfs_start,
__initramfs_end - __initramfs_start, 0);
if (err)
- panic(err);
+ panic(err); /* Failed to decompress INTERNAL initramfs */
if (initrd_start) {
#ifdef CONFIG_BLK_DEV_RAM
int fd;
@@ -554,9 +554,12 @@ static int __init populate_rootfs(void)
printk(KERN_INFO "Unpacking initramfs...");
err = unpack_to_rootfs((char *)initrd_start,
initrd_end - initrd_start, 0);
- if (err)
- panic(err);
- printk(" done\n");
+ if (err) {
+ printk(" failed!\n");
+ printk(KERN_EMERG "%s\n", err);
+ } else {
+ printk(" done\n");
+ }
free_initrd();
#endif
}
--
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