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| author | Vineet Gupta <vgupta@synopsys.com> | 2013-11-28 12:27:54 +0400 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-12-23 10:35:04 +0400 |
| commit | d8e8c7dda11f5d5cf90495f2e89d917a83509bc0 (patch) | |
| tree | 8b8414e2bd4ed6b92bf35a36a3d891fa14399661 /arch/arc/kernel/head.S | |
| parent | f2a4aa5646687f9a51616581221b1d348590d47e (diff) | |
| download | linux-d8e8c7dda11f5d5cf90495f2e89d917a83509bc0.tar.xz | |
ARC: [SMP] optimize IPI send and receive
* Don't send an IPI if receiver already has a pending IPI.
Atomically piggyback the new msg with pending msg.
* IPI receiver looping on xchg() not required
References: https://lkml.org/lkml/2013/11/25/232
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/kernel/head.S')
0 files changed, 0 insertions, 0 deletions