[src/trunk]: src/sys/arch/alpha/alpha Alpha will size the mutex structure in ...

[mhitch <mhitch%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/bdfad77299be
branches:  trunk
changeset: 747319:bdfad77299be
user:      mhitch <mhitch%NetBSD.org@localhost>
date:      Thu Sep 10 22:27:11 2009 +0000

description:
Alpha will size the mutex structure in pmap_tlb_shootdown_q to 16 bytes.
Change the command and pad accordingly;  now pmap_tlb_shootdown_q entries
really are cache-aligned.

diffstat:

 sys/arch/alpha/alpha/pmap.c |  8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diffs (32 lines):

diff -r 58c5343e257f -r bdfad77299be sys/arch/alpha/alpha/pmap.c
--- a/sys/arch/alpha/alpha/pmap.c       Thu Sep 10 22:02:40 2009 +0000
+++ b/sys/arch/alpha/alpha/pmap.c       Thu Sep 10 22:27:11 2009 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.241 2009/09/10 21:36:39 mhitch Exp $ */
+/* $NetBSD: pmap.c,v 1.242 2009/09/10 22:27:11 mhitch Exp $ */
 
 /*-
  * Copyright (c) 1998, 1999, 2000, 2001, 2007, 2008 The NetBSD Foundation, Inc.
@@ -140,7 +140,7 @@
 
 #include <sys/cdefs.h>                 /* RCS ID & Copyright macro defns */
 
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.241 2009/09/10 21:36:39 mhitch Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.242 2009/09/10 22:27:11 mhitch Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -422,11 +422,11 @@
 
 static struct pmap_tlb_shootdown_q {
        TAILQ_HEAD(, pmap_tlb_shootdown_job) pq_head;   /* queue 16b */
-       kmutex_t pq_lock;               /* spin lock on queue 12b */
+       kmutex_t pq_lock;               /* spin lock on queue 16b */
        int pq_pte;                     /* aggregate PTE bits 4b */
        int pq_count;                   /* number of pending requests 4b */
        int pq_tbia;                    /* pending global flush 4b */
-       uint8_t pq_pad[64-16-12-4-4-4]; /* pad to 64 bytes */
+       uint8_t pq_pad[64-16-16-4-4-4]; /* pad to 64 bytes */
 } pmap_tlb_shootdown_q[ALPHA_MAXPROCS] __aligned(CACHE_LINE_SIZE);
 
 /* If we have more pending jobs than this, we just nail the whole TLB. */