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The BAU confers no benefit to a UV system running with only one hub/socket. Permanently disable the BAU driver if there are less than two hubs online to avoid BAU overhead. We have observed failed boots on single-socket UV4 systems caused by BAU that are avoided with this patch. Also, while at it, consolidate initialization error blocks and fix a memory leak. Signed-off-by: Andrew Banman <abanman@hpe.com> Acked-by: Russ Anderson <rja@hpe.com> Acked-by: Mike Travis <mike.travis@hpe.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: tony.ernst@hpe.com Link: http://lkml.kernel.org/r/1500588351-78016-1-git-send-email-abanman@hpe.com [ Minor cleanups. ] Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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