svn commit: r233925 - in head: sys/kern sys/sys sys/vm usr.bin/kdump usr.bin/ktrace

John Baldwin jhb at freebsd.org
Thu May 31 14:48:48 UTC 2012


On Wednesday, May 30, 2012 11:11:57 pm Peter Jeremy wrote:
> On 2012-Apr-05 17:13:14 +0000, John Baldwin <jhb at FreeBSD.org> wrote:
> >Log:
> >  Add new ktrace records for the start and end of VM faults.  This gives
> >  a pair of records similar to syscall entry and return that a user can
> >  use to determine how long page faults take.  The new ktrace records are
> >  enabled via the 'p' trace type, and are enabled in the default set of
> >  trace points.
> 
> I've just found a case where this is very useful but I find that
> the PFLT/PRET entries are clutter much of the time and would suggest
> that they be off by default.

I'm not opposed to doing that.  I also find that it results in clutter more 
often than not.

> >  MFC after:	2 weeks
> 
> This expired some time ago, do you intend to MFC these changes in
> the near future?

Yes, I have that and some other changes I need to MFC.  These require a bit 
more testing than simple fixes which I have been more diligent about merging.

-- 
John Baldwin


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