Re: [uml-devel] Re: Fw: [patch] uml: terminal cleanup

[Gerd Knorr <kraxel@bytesex.org>]

> No, this does not happen... the normal situation currently is that the kernel 
> skips printing part of the initial output.
> 
> $ ./OldKernels/vmlinux-2.6.11-rc3
> Checking for /proc/mm...found
> Checking for the skas3 patch in the host...found
> Checking PROT_EXEC mmap in /tmp...OK
> ject_hotplug - call_usermodehelper returned -1
> io scheduler noop registered
> NET: Registered protocol family 2
> IP: routing cache hash table of 256 buckets, 4Kbytes
> TCP established hash table entries: 2048 (order: 3, 32768 bytes)
> TCP bind hash table entries: 2048 (order: 2, 24576 bytes)
> TCP: Hash tables configured (established 2048 bind 2048)
> Initialized stdio console driver
> Console initialized on /dev/tty0
> Initializing software serial port version 1
> Kernel panic - not syncing: VFS: Unable to mount root fs on 
> unknown-block(98,0)

Ouch.  I've never seen that myself though, works perfectly fine for me.
Could be somehow related to the scrambled compiler logs reported a few
weeks ago, maybe the tty/line buffer handling is broken ...

> $ ./OldKernels/vmlinux-2.6.11-rc3 stderr=1

[ snip ]

as expected ...

> $ ./vmlinux-2.6.11-rc4-bk-testLock-nofix console=stderr
> Checking for /proc/mm...found
> Checking for the skas3 patch in the host...found
> Checking PROT_EXEC mmap in /tmp...OK
> [ no more messages ]

stderr=1 is needed in any case.  console=stderr might be needed
additionally in case you want to sent the kernel messages to _two_
console devices, i.e. something like this (both stderr and the xterm
for tty1):

# linux con=pts con1=xterm stderr=1 console=stderr console=tty1

HTH,

  Gerd

-- 
#define printk(args...) fprintf(stderr, ## args)


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