On Friday 06 January 2006 01:07 pm, John Baldwin wrote: > jhb 2006-01-06 18:07:32 UTC > > FreeBSD src repository > > Modified files: > sys/kern kern_mutex.c kern_sx.c subr_witness.c > sys/sys _lock.h lock.h > Log: > Trim another pointer from struct lock_object (and thus from struct mtx > and struct sx). Instead of storing a direct pointer to a our lock_class > struct in lock_object, reserve 4 bits in the lo_flags field to serve as an > index into a global lock_classes array that contains pointers to the lock > classes. Only debugging code such as WITNESS or INVARIANTS checks and KTR > logging need to access the lock_class member, so this shouldn't add any > overhead to production kernels. It might add some slight overhead to > kernels using those debug options however. > > As with the previous set of changes to lock_object, this is going to > completely obliterate the kernel ABI, so be sure to recompile all your > modules.
Forgot: Tested on: alpha, amd64, i386, sparc64 -- John Baldwin <[EMAIL PROTECTED]> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org _______________________________________________ cvs-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/cvs-all To unsubscribe, send any mail to "[EMAIL PROTECTED]"
