kern/44378: uprintf() get lost in rump kernel

[bouyer%antioche.eu.org@localhost]

>Number:         44378
>Category:       kern
>Synopsis:       uprintf() get lost in rump kernel
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jan 12 18:20:00 +0000 2011
>Originator:     Manuel Bouyer
>Release:        NetBSD 5.99.42
>Organization:
>Environment:
System: NetBSD comore.lip6.fr 5.99.42 NetBSD 5.99.42 (XEN3_DOMU) #0: Sat Jan  1 
03:39:17 UTC 2011  
builds%b7.netbsd.org@localhost:/home/builds/ab/HEAD/amd64/201101010900Z-obj/home/builds/ab/HEAD/src/sys/arch/amd64/compile/XEN3_DOMU
 amd64
Architecture: amd64
Machine: amd64
>Description:
        trying rump_ffs on a filesystem image with unsupported features
        (like a unsupported flag in fs_flags) fails with EINVAL.
        The kernel also does a uprintf() with details about the unsupported
        feature, but this doesn't show up even with RUMP_VERBOSE.
        I would expect this message to go to stderr.
>How-To-Repeat:
        This can probably be repeated by filling up the rump_ffs-mounted
        filesystem; this triggers the uprintf() at the end of
        ffs_alloc(), ffs_realloccg() or ffs_valloc().
>Fix: