Messages in this thread |  | | From | David Woodhouse <> | Subject | Re: [linux-usb-devel] Re: [BK PATCH] USB changes for 2.5.34 | Date | Mon, 16 Sep 2002 15:14:03 +0100 |
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axboe@suse.de said: > See, even though I'm not fundamentally against using kernel > debuggers, I think this is very wrong. Where are you now? You are just > learning about the bio interface and the changes needed to make it > run. And this is definitely the most wrong point to start using a > debugger, and can only result in a dac960 that works by trial and > error.
Nevertheless, the existence of a case where it's not sensible to use a debugger does not prove the non-existence of cases where it _is_ sensible to use a debugger.
A case that happened to me recently -- tail-call optimisations screwed up the return value of a function somewhere deep in the routing code. Adding a printk made the problem go away. Staring at the C code was also of no use -- the C code was just fine.
Now, are you seriously suggesting that instead of using GDB to work out WTF was going on I should have spent three weeks starting at the output of 'objdump -d vmlinux' ?
While my balls are big enough and hairy enough that I don't need to use GDB to debug my own code, I feel no shame in admitting that I'm so much of a pussy I can't deal with the above case without GDB.
-- dwmw2
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