Re: [PATCH] shrink printk timestamp field

[Joe Korty <joe.korty@ccur.com>]

On Fri, Aug 29, 2008 at 07:35:40PM -0400, Andrew Morton wrote:
> On Wed, 27 Aug 2008 11:17:59 -0400 Joe Korty <joe.korty@ccur.com> wrote:
> 
> > Shrink the printk timestamp field.
> >
> > Keep the printk timestamp from occupying more of the
> > scarce, 80-column console line space than it really needs.
> >
> 
> This is a significant loss in utility.
> 
> [   16.817285] md: Autodetecting RAID arrays.
> [   16.817288] md: Scanned 0 and added 0 devices.
> [   16.817290] md: autorun ...
> [   16.817292] md: ... autorun DONE.
> 
> This not-terribly-fast machine can emit printks into the log buffer
> within two microseconds.  That's a pretty useful ad-hoc timing
> factility.
> 
> This patch will reduce the precision by a factor of five hundred.

I was looking at it from the point of view of finding out where the
boot process was too slow.  For that millisecs is enough.  I am not
sure where knowing printk output to the microsec would be useful for
solving anything.

Joe