Date: Thu, 17 Jul 2014 12:41:31 +1000 From: Nigel Williams <njwilliams@swin.edu.au> To: freebsd-net@freebsd.org Subject: Re: Multipath TCP for FreeBSD v0.4 Message-ID: <53C737DB.4030804@swin.edu.au> In-Reply-To: <20140714063019.876218DD@hub.freebsd.org> References: <513CB9AF.3090409@swin.edu.au> <53BF8945.3000802@swin.edu.au> <20140711102535.7613DBE5@hub.freebsd.org> <53C341FC.4060307@swin.edu.au> <20140714063019.876218DD@hub.freebsd.org>
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Just a quick note for anyone else that might be trying out the patch... > > and I've built the whole system on both nodes without WITNESS and other debug- > ging functionalities: > =============================================================================== > Index: /usr/src/sys/amd64/conf/GENERIC > =================================================================== > --- /usr/src/sys/amd64/conf/GENERIC (revision 265307) > +++ /usr/src/sys/amd64/conf/GENERIC (working copy) > @@ -76,14 +76,14 @@ > options KDB # Enable kernel debugger support. > options KDB_TRACE # Print a stack trace for a panic. > # For full debugger support use (turn off in stable branch): > -options DDB # Support DDB. > -options GDB # Support remote GDB. > -options DEADLKRES # Enable the deadlock resolver > -options INVARIANTS # Enable calls of extra sanity checking > -options INVARIANT_SUPPORT # Extra sanity checks of internal structures, required by INVARIANTS > -options WITNESS # Enable checks to detect deadlocks and cycles > -options WITNESS_SKIPSPIN # Don't run witness on spinlocks for speed > -options MALLOC_DEBUG_MAXZONES=8 # Separate malloc(9) zones > +#options DDB # Support DDB. > +#options GDB # Support remote GDB. > +#options DEADLKRES # Enable the deadlock resolver > +#options INVARIANTS # Enable calls of extra sanity checking > +#options INVARIANT_SUPPORT # Extra sanity checks of internal structures, required by INVARIANTS > +#options WITNESS # Enable checks to detect deadlocks and cycles > +#options WITNESS_SKIPSPIN # Don't run witness on spinlocks for speed > +#options MALLOC_DEBUG_MAXZONES=8 # Separate malloc(9) zones > > # Make an SMP-capable kernel by default > options SMP # Symmetric MultiProcessor Kernel > =============================================================================== I'd recommend leaving debugging options on (at minimum INVARIANTS and INVARIANT_SUPPORT). This will slow network performance but will allow a number of assertions to run that can make it a little easier to debug some issues. cheers, nigel
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