On 05/20/2011 04:14 PM, Paul E. McKenney wrote: > 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? the same one i sent out before, but let DEBUG_LOCKING_API_SELFTESTS disabled. Thanks -- 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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