From patchwork Thu Dec 5 00:51:53 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 11273935 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 719E3112B for ; Thu, 5 Dec 2019 00:51:57 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3DBD324658 for ; Thu, 5 Dec 2019 00:51:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="iv+10T8g" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3DBD324658 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 292C16B0DB3; Wed, 4 Dec 2019 19:51:56 -0500 (EST) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 21BA26B0DB5; Wed, 4 Dec 2019 19:51:56 -0500 (EST) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 159406B0DB6; Wed, 4 Dec 2019 19:51:56 -0500 (EST) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0223.hostedemail.com [216.40.44.223]) by kanga.kvack.org (Postfix) with ESMTP id F12C86B0DB3 for ; Wed, 4 Dec 2019 19:51:55 -0500 (EST) Received: from smtpin19.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with SMTP id B6BC145B3 for ; Thu, 5 Dec 2019 00:51:55 +0000 (UTC) X-FDA: 76229260590.19.body33_10ce93836db55 X-Spam-Summary: 2,0,0,a7723acc664c7f4e,d41d8cd98f00b204,akpm@linux-foundation.org,:akpm@linux-foundation.org:cl@linux.com:dvyukov@google.com:elver@google.com:glider@google.com:jannh@google.com:kcc@google.com:keescook@chromium.org:labbott@redhat.com::mm-commits@vger.kernel.org:ndesaulniers@google.com:sspatil@android.com:torvalds@linux-foundation.org,RULES_HIT:41:355:379:800:960:965:966:967:973:988:989:1260:1263:1345:1359:1381:1431:1437:1534:1542:1711:1730:1747:1777:1792:2194:2196:2199:2200:2393:2525:2559:2563:2682:2685:2859:2902:2933:2937:2939:2942:2945:2947:2951:2954:3022:3138:3139:3140:3141:3142:3353:3865:3866:3867:3871:3872:3874:3934:3936:3938:3941:3944:3947:3950:3953:3956:3959:4321:4385:4390:4395:4605:5007:6261:6653:6737:7576:8599:8603:9025:9121:9545:10004:10913:11026:11473:11658:11914:12043:12048:12296:12297:12438:12517:12519:12555:12679:12783:12986:13161:13229:13846:14181:14721:14849:21080:21451:21627:21939:30054:30070,0,RBL:error,CacheIP:none,Bayesian:0.5,0.5,0.5,Netche ck:none, X-HE-Tag: body33_10ce93836db55 X-Filterd-Recvd-Size: 3772 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf40.hostedemail.com (Postfix) with ESMTP for ; Thu, 5 Dec 2019 00:51:55 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2F43521823; Thu, 5 Dec 2019 00:51:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575507114; bh=17G7JOt2zsWFoKDuCu/+7eq4GJhG+njWoVjJ8IdSX/w=; h=Date:From:To:Subject:In-Reply-To:From; b=iv+10T8gNftkJzb4kpUZ7lzoX4wSm5KlLSMXRSl0TksZ2UJ4H8sytM7FceV24QGBY 5M6IUPm5X2JuWeHguT1mpdDRqARnEg4Eja81NdzqabZlVE53prBdKzogL29BUA29Jm rmfZoqrUk7bv3HiMMo68XPz1VIRwgs9gM+/kAQJg= Date: Wed, 04 Dec 2019 16:51:53 -0800 From: Andrew Morton To: akpm@linux-foundation.org, cl@linux.com, dvyukov@google.com, elver@google.com, glider@google.com, jannh@google.com, kcc@google.com, keescook@chromium.org, labbott@redhat.com, linux-mm@kvack.org, mm-commits@vger.kernel.org, ndesaulniers@google.com, sspatil@android.com, torvalds@linux-foundation.org Subject: [patch 40/86] lib/test_meminit.c: add bulk alloc/free tests Message-ID: <20191205005153.KfRybm5gF%akpm@linux-foundation.org> In-Reply-To: <20191204164858.fe4ed8886e34ad9f3b34ea00@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Laura Abbott Subject: lib/test_meminit.c: add bulk alloc/free tests kmem_cache_alloc_bulk/kmem_cache_free_bulk are used to make multiple allocations of the same size to avoid the overhead of multiple kmalloc/kfree calls. Extend the kmem_cache tests to make some calls to these APIs. Link: http://lkml.kernel.org/r/20191107191447.23058-1-labbott@redhat.com Signed-off-by: Laura Abbott Reviewed-by: Kees Cook Tested-by: Alexander Potapenko Cc: Laura Abbott Cc: Christoph Lameter Cc: Nick Desaulniers Cc: Kostya Serebryany Cc: Dmitry Vyukov Cc: Sandeep Patil Cc: Jann Horn Cc: Marco Elver Signed-off-by: Andrew Morton --- lib/test_meminit.c | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) --- a/lib/test_meminit.c~lib-test_meminitc-add-bulk-alloc-free-tests +++ a/lib/test_meminit.c @@ -183,6 +183,9 @@ static bool __init check_buf(void *buf, return fail; } +#define BULK_SIZE 100 +static void *bulk_array[BULK_SIZE]; + /* * Test kmem_cache with given parameters: * want_ctor - use a constructor; @@ -203,9 +206,24 @@ static int __init do_kmem_cache_size(siz want_rcu ? SLAB_TYPESAFE_BY_RCU : 0, want_ctor ? test_ctor : NULL); for (iter = 0; iter < 10; iter++) { + /* Do a test of bulk allocations */ + if (!want_rcu && !want_ctor) { + int ret; + + ret = kmem_cache_alloc_bulk(c, alloc_mask, BULK_SIZE, bulk_array); + if (!ret) { + fail = true; + } else { + int i; + for (i = 0; i < ret; i++) + fail |= check_buf(bulk_array[i], size, want_ctor, want_rcu, want_zero); + kmem_cache_free_bulk(c, ret, bulk_array); + } + } + buf = kmem_cache_alloc(c, alloc_mask); /* Check that buf is zeroed, if it must be. */ - fail = check_buf(buf, size, want_ctor, want_rcu, want_zero); + fail |= check_buf(buf, size, want_ctor, want_rcu, want_zero); fill_with_garbage_skip(buf, size, want_ctor ? CTOR_BYTES : 0); if (!want_rcu) {