From: Jon R. <ra...@cs...> - 2007-09-27 18:06:18
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Is there a way to view printk's from UML before the console is fully set up? I am getting a segfault before printk can make its way to the console so I can't view any output. Basically my session is this: ... Checking for the skas3 patch in the host: - /proc/mm...not found: No such file or directory - PTRACE_FAULTINFO...not found - PTRACE_LDT...not found UML running in SKAS0 mode Segmentation fault I would imagine the printk's wouldn't be seen in a regular boot of linux so there must be some use for them, right? |
From: Jeff D. <jd...@ad...> - 2007-09-27 19:53:54
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On Thu, Sep 27, 2007 at 12:05:40PM -0600, Jon Rafkind wrote: > Is there a way to view printk's from UML before the console is fully set > up? I am getting a segfault before printk can make its way to the > console so I can't view any output. Basically my session is this: > > ... > Checking for the skas3 patch in the host: > - /proc/mm...not found: No such file or directory > - PTRACE_FAULTINFO...not found > - PTRACE_LDT...not found > UML running in SKAS0 mode > Segmentation fault Try adding 'stderr=1' to the command line. Also, if you get a core file, gdb it, and (gdb) printf "%s", log_buf should give you all printk output. Jeff -- Work email - jdike at linux dot intel dot com |