Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

mcl_cache: align items to COHERENCY_UNIT

Browse Source 
Because we do cache incoherent DMA to/from mbufs we cannot safely share
share cache lines with adjacent items that may be concurrently accessed.
This commit is contained in:
tnn 2019-10-19 06:36:47 +00:00
parent 480b09a72e
commit 4d0eb0fca4
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
sys/kern/uipc_mbuf.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: uipc_mbuf.c,v 1.234 2019/09/28 16:02:12 jmcneill Exp $ */
/* $NetBSD: uipc_mbuf.c,v 1.235 2019/10/19 06:36:47 tnn Exp $ */
/*
* Copyright (c) 1999, 2001, 2018 The NetBSD Foundation, Inc.
@ -62,7 +62,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uipc_mbuf.c,v 1.234 2019/09/28 16:02:12 jmcneill Exp $");
__KERNEL_RCSID(0, "$NetBSD: uipc_mbuf.c,v 1.235 2019/10/19 06:36:47 tnn Exp $");
#ifdef _KERNEL_OPT
#include "opt_mbuftrace.h"
@ -188,8 +188,8 @@ mbinit(void)
NULL, IPL_VM, mb_ctor, NULL, NULL);
KASSERT(mb_cache != NULL);
mcl_cache = pool_cache_init(mclbytes, 0, 0, 0, "mclpl", NULL,
IPL_VM, NULL, NULL, NULL);
mcl_cache = pool_cache_init(mclbytes, COHERENCY_UNIT, 0, 0, "mclpl",
NULL, IPL_VM, NULL, NULL, NULL);
KASSERT(mcl_cache != NULL);
pool_cache_set_drain_hook(mb_cache, mb_drain, NULL);