* [PATCH] powerpc: Fix comment explaining our VSID layout
@ 2011-12-13 6:16 Anton Blanchard
0 siblings, 0 replies; only message in thread
From: Anton Blanchard @ 2011-12-13 6:16 UTC (permalink / raw)
To: benh, paulus; +Cc: linuxppc-dev
We support 16TB of user address space and half a million contexts
so update the comment to reflect this.
Signed-off-by: Anton Blanchard <anton@samba.org>
---
Index: linux-powerpc/arch/powerpc/include/asm/mmu-hash64.h
===================================================================
--- linux-powerpc.orig/arch/powerpc/include/asm/mmu-hash64.h 2011-12-13 14:47:14.498301148 +1100
+++ linux-powerpc/arch/powerpc/include/asm/mmu-hash64.h 2011-12-13 14:58:01.085510915 +1100
@@ -312,10 +312,9 @@ extern void slb_set_size(u16 size);
* (i.e. everything above 0xC000000000000000), except the very top
* segment, which simplifies several things.
*
- * - We allow for 15 significant bits of ESID and 20 bits of
- * context for user addresses. i.e. 8T (43 bits) of address space for
- * up to 1M contexts (although the page table structure and context
- * allocation will need changes to take advantage of this).
+ * - We allow for 16 significant bits of ESID and 19 bits of
+ * context for user addresses. i.e. 16T (44 bits) of address space for
+ * up to half a million contexts.
*
* - The scramble function gives robust scattering in the hash
* table (at least based on some initial results). The previous
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2011-12-13 6:16 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2011-12-13 6:16 [PATCH] powerpc: Fix comment explaining our VSID layout Anton Blanchard
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).