From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753847AbcKRTeL (ORCPT ); Fri, 18 Nov 2016 14:34:11 -0500 Received: from shards.monkeyblade.net ([184.105.139.130]:40500 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753149AbcKRTeJ (ORCPT ); Fri, 18 Nov 2016 14:34:09 -0500 Date: Fri, 18 Nov 2016 14:34:07 -0500 (EST) Message-Id: <20161118.143407.750907377181864816.davem@davemloft.net> To: babu.moger@oracle.com Cc: peterz@infradead.org, mingo@redhat.com, akpm@linux-foundation.org, keescook@chromium.org, dan.j.williams@intel.com, aryabinin@virtuozzo.com, tj@kernel.org, sam@ravnborg.org, linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org Subject: Re: [PATCH v3 0/2] Ajust lockdep static allocations for sparc From: David Miller In-Reply-To: <1475004808-91920-1-git-send-email-babu.moger@oracle.com> References: <1475004808-91920-1-git-send-email-babu.moger@oracle.com> X-Mailer: Mew version 6.7 on Emacs 24.5 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Fri, 18 Nov 2016 10:34:41 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Babu Moger Date: Tue, 27 Sep 2016 12:33:26 -0700 > These patches limit the static allocations for lockdep data structures > used for debugging locking correctness. For sparc, all the kernel's code, > data, and bss, must have locked translations in the TLB so that we don't > get TLB misses on kernel code and data. Current sparc chips have 8 TLB > entries available that may be locked down, and with a 4mb page size, > this gives a maximum of 32MB. With PROVE_LOCKING we could go over this > limit and cause system boot-up problems. These patches limit the static > allocations so that everything fits in current required size limit. > > patch 1 : Adds new config parameter CONFIG_PROVE_LOCKING_SMALL > Patch 2 : Adjusts the sizes based on the new config parameter > > v2-> v3: > Some more comments from Sam Ravnborg and Peter Zijlstra. > Defined PROVE_LOCKING_SMALL as invisible and moved the selection to > arch/sparc/Kconfig. > > v1-> v2: > As suggested by Peter Zijlstra, keeping the default as is. > Introduced new config variable CONFIG_PROVE_LOCKING_SMALL > to handle sparc specific case. > > v0: > Initial revision. Series applied, thanks.