Re: [PATCH] remove unimplemented syscalls noise

From: David Mosberger <>
Date: 2003-11-20 07:33:17
>>>>> On Wed, 19 Nov 2003 20:20:20 +0000, Matthew Wilcox <> said:

  >>  And yet both features are incredibly useful when debugging,
  >> something you seem to ignore.

  Matthew> No, it *isn't*.  The majority of systems in use are not
  Matthew> being debugged (regardless of how you & I spend most of our
  Matthew> time).

Please read my sentence: it's incredibly useful when _debugging_ a

Nobody suggests to print those messages for normal users.  dmesg -n4
will take care of them for good.

  Matthew> Every time we emit something to the system log, it's a
  Matthew> potential support call.  Our friends in other parts of HP
  Matthew> are already unhappy with how much output Linux produces
  Matthew> even when everything's OK.  It's also a sysadmin hassle as
  Matthew> logfiles fill up more quickly when this kind of junk goes
  Matthew> by.

Can I say dmesg -n4??

  Matthew> I'm sure this was useful for debugging once, but those days
  Matthew> are gone.  We need to print less of this stuff.  Something
  Matthew> a lot of places do is:

  Matthew> #undef DEBUG

  Matthew> #ifdef DEBUG #define DBG(x...) printk(x) #else #define
  Matthew> DBG(x...)  #endif

  Matthew> Would it mollify you if these printks were turned into
  Matthew> DBGs?

Nope.  dmesg -n4 is adequate.

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Received on Wed Nov 19 15:33:54 2003

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