https://github.com/torvalds/linux
Revision 2fe9a5c6ade4dfb53ff1c137cca3828d9d1d0948 authored by Andrew Banman on 20 July 2017, 22:05:51 UTC, committed by Ingo Molnar on 21 July 2017, 07:56:25 UTC
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>
1 parent 0bc7304
History
Tip revision: 2fe9a5c6ade4dfb53ff1c137cca3828d9d1d0948 authored by Andrew Banman on 20 July 2017, 22:05:51 UTC
x86/platform/uv/BAU: Disable BAU on single hub configurations
Tip revision: 2fe9a5c
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.cocciconfig -rw-r--r-- 59 bytes
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.gitattributes -rw-r--r-- 30 bytes
.gitignore -rw-r--r-- 1.3 KB
.mailmap -rw-r--r-- 8.1 KB
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