Re: [PATCH RFC v3 1/2] mm: Add personality flag to limit address to 47 bits

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diff --git a/include/uapi/linux/personality.h b/include/uapi/linux/personality.h
index 49796b7756af..cd3b8c154d9b 100644
--- a/include/uapi/linux/personality.h
+++ b/include/uapi/linux/personality.h
@@ -22,6 +22,7 @@ enum {
  	WHOLE_SECONDS =		0x2000000,
  	STICKY_TIMEOUTS	=	0x4000000,
  	ADDR_LIMIT_3GB = 	0x8000000,
+	ADDR_LIMIT_47BIT = 	0x10000000,
  };

I wonder if ADDR_LIMIT_128T would be clearer?


I don't follow, what does 128T represent?


128T is 128 Terabytes, that's the maximum size achievable with a 47BIT address, that naming would be more consistant with the ADDR_LIMIT_3GB just above that means a 3 Gigabytes limit.

Christophe




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