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| author | Peter Zijlstra | 2016-07-18 20:41:10 +0200 |
|---|---|---|
| committer | Ingo Molnar | 2016-07-20 09:48:40 +0200 |
| commit | 08e237fa56a1d95c1372033bc29c4a2517b3c0fa (patch) | |
| tree | 516f04cfcd11fafd8d801c7ce0ed60ca660d26d0 /drivers/idle | |
| parent | Merge branch 'linus' into x86/cpu, to pick up fixes (diff) | |
| download | kernel-qcow2-linux-08e237fa56a1d95c1372033bc29c4a2517b3c0fa.tar.gz kernel-qcow2-linux-08e237fa56a1d95c1372033bc29c4a2517b3c0fa.tar.xz kernel-qcow2-linux-08e237fa56a1d95c1372033bc29c4a2517b3c0fa.zip | |
x86/cpu: Add workaround for MONITOR instruction erratum on Goldmont based CPUs
Monitored cached line may not wake up from mwait on certain
Goldmont based CPUs. This patch will avoid calling
current_set_polling_and_test() and thereby not set the TIF_ flag.
The result is that we'll always send IPIs for wakeups.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1468867270-18493-1-git-send-email-jacob.jun.pan@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/idle')
0 files changed, 0 insertions, 0 deletions