On Fri, May 20, 2011 at 04:09:22PM -0700, Yinghai Lu wrote: > On 05/20/2011 03:42 PM, Paul E. McKenney wrote: > > On Fri, May 20, 2011 at 02:04:06PM -0700, Yinghai Lu wrote: > >> On 05/19/2011 02:37 PM, tip-bot for Paul E. McKenney wrote: > >>> Commit-ID: 80d02085d99039b3b7f3a73c8896226b0cb1ba07 > >>> Gitweb: http://git.kernel.org/tip/80d02085d99039b3b7f3a73c8896226b0cb1ba07 > >>> Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> > >>> AuthorDate: Thu, 12 May 2011 01:08:07 -0700 > >>> Committer: Ingo Molnar <mingo@xxxxxxx> > >>> CommitDate: Thu, 19 May 2011 23:25:29 +0200 > >>> > >>> Revert "rcu: Decrease memory-barrier usage based on semi-formal proof" > >>> > >>> This reverts commit e59fb3120becfb36b22ddb8bd27d065d3cdca499. > >>> > >>> This reversion was due to (extreme) boot-time slowdowns on SPARC seen by > >>> Yinghai Lu and on x86 by Ingo > >>> . > >>> This is a non-trivial reversion due to intervening commits. > >>> > >>> Conflicts: > >>> > >>> Documentation/RCU/trace.txt > >>> kernel/rcutree.c > >>> > >>> Signed-off-by: Ingo Molnar <mingo@xxxxxxx> > >>> --- > >>> Documentation/RCU/trace.txt | 17 ++++-- > >>> kernel/rcutree.c | 130 ++++++++++++++++++++++++------------------ > >>> kernel/rcutree.h | 9 ++- > >>> kernel/rcutree_plugin.h | 7 +- > >>> kernel/rcutree_trace.c | 12 ++-- > >>> 5 files changed, 102 insertions(+), 73 deletions(-) > >>> > >> > >> current tip/master that have this reverting and without setting DEBUG_LOCKING_API_SELFTESTS > >> > >> still get delay > >> > >> [ 35.419453] cpu_dev_init done > >> [ 128.981770] memory_dev_init done > >> > >> should take only 3 or 4 seconds. > > > > Thank you for checking this out. > > > > This is with the same configuration you sent earlier? (Other than the > > DEBUG_LOCKING_API_SELFTESTS, of course.) > > > > 8 socket westmere-ex. and compiled with gcc from opensuse 11.3. > > if compile kernel from fedora 14, there will be not delay. Thank you for the info. Could you please send me the .config files from both builds? Thanx, Paul -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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