From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932998AbcIZWcn (ORCPT ); Mon, 26 Sep 2016 18:32:43 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:51276 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S941893AbcIZWc2 (ORCPT ); Mon, 26 Sep 2016 18:32:28 -0400 From: Babu Moger To: peterz@infradead.org, mingo@redhat.com, akpm@linux-foundation.org, keescook@chromium.org, dan.j.williams@intel.com, aryabinin@virtuozzo.com, tj@kernel.org Cc: linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, babu.moger@oracle.com Subject: [PATCH v2 2/2] lockdep: Keep the static allocations small for PROVE_LOCKING_SMALL Date: Mon, 26 Sep 2016 15:31:38 -0700 Message-Id: <1474929098-68914-3-git-send-email-babu.moger@oracle.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1474929098-68914-1-git-send-email-babu.moger@oracle.com> References: <1474929098-68914-1-git-send-email-babu.moger@oracle.com> X-Source-IP: aserv0021.oracle.com [141.146.126.233] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Reduce the size of data structure for lockdep entries half if PROVE_LOCKING_SMALL if defined. This is used for sparc. This config variable is disabled by default. Signed-off-by: Babu Moger --- kernel/locking/lockdep_internals.h | 13 ++++++++++--- 1 files changed, 10 insertions(+), 3 deletions(-) diff --git a/kernel/locking/lockdep_internals.h b/kernel/locking/lockdep_internals.h index 51c4b24..7d364a6 100644 --- a/kernel/locking/lockdep_internals.h +++ b/kernel/locking/lockdep_internals.h @@ -54,18 +54,25 @@ enum { * table (if it's not there yet), and we check it for lock order * conflicts and deadlocks. */ +#ifdef CONFIG_PROVE_LOCKING_SMALL +#define MAX_LOCKDEP_ENTRIES 16384UL +#define MAX_LOCKDEP_CHAINS_BITS 15 +#define MAX_STACK_TRACE_ENTRIES 262144UL +#else #define MAX_LOCKDEP_ENTRIES 32768UL #define MAX_LOCKDEP_CHAINS_BITS 16 -#define MAX_LOCKDEP_CHAINS (1UL << MAX_LOCKDEP_CHAINS_BITS) - -#define MAX_LOCKDEP_CHAIN_HLOCKS (MAX_LOCKDEP_CHAINS*5) /* * Stack-trace: tightly packed array of stack backtrace * addresses. Protected by the hash_lock. */ #define MAX_STACK_TRACE_ENTRIES 524288UL +#endif + +#define MAX_LOCKDEP_CHAINS (1UL << MAX_LOCKDEP_CHAINS_BITS) + +#define MAX_LOCKDEP_CHAIN_HLOCKS (MAX_LOCKDEP_CHAINS*5) extern struct list_head all_lock_classes; extern struct lock_chain lock_chains[]; -- 1.7.1