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Revert "arm64: Increase the max granular size" 

This reverts commit 9730348075.

Commit 9730348075 ("arm64: Increase the max granular size") increased
the cache line size to 128 to match Cavium ThunderX, apparently for some
performance benefit which could not be confirmed. This change, however,
has an impact on the network packet allocation in certain circumstances,
requiring slightly over a 4K page with a significant performance
degradation. The patch reverts L1_CACHE_SHIFT back to 6 (64-byte cache
line).

Cc: Will Deacon <will.deacon@arm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
pull/560/merge
Catalin Marinas 2018-05-11 13:25:49 +01:00
parent 75bc37fefc
commit d93277b983
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/include/asm/cache.h
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@ -33,7 +33,7 @@
#define ICACHE_POLICY_VIPT 2
#define ICACHE_POLICY_PIPT 3
#define L1_CACHE_SHIFT 7
#define L1_CACHE_SHIFT (6)
#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
/*