From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 18399C43460 for ; Fri, 7 May 2021 01:04:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DB52D610F7 for ; Fri, 7 May 2021 01:04:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234097AbhEGBFv (ORCPT ); Thu, 6 May 2021 21:05:51 -0400 Received: from mail.kernel.org ([198.145.29.99]:46568 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230384AbhEGBFu (ORCPT ); Thu, 6 May 2021 21:05:50 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 645F161289; Fri, 7 May 2021 01:04:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1620349491; bh=aRfkhS6Ve5ejvbbwrSS0l5EzB7qePCAjymWgIrZAoo0=; h=Date:From:To:Subject:In-Reply-To:From; b=z2w+MxHtb3VqAssw682trmSH8GLgu5ykAnlAnunwnlYIHMNxirHVdjE/iTOeGSZ04 tko0g5ma14gK4bm0vjyMxnHZeJT5jJ8YgHKWP/PZPKrZCgbwfhEnAEPh/C66xd9DCg NGMU+r1E8IJqu6Hq9VB8qcU2rWGgF7ST1ujushEU= Date: Thu, 06 May 2021 18:04:51 -0700 From: Andrew Morton To: akpm@linux-foundation.org, johannes.berg@intel.com, linux-mm@kvack.org, mm-commits@vger.kernel.org, ndesaulniers@google.com, oberpar@linux.ibm.com, torvalds@linux-foundation.org Subject: [patch 54/91] gcov: use kvmalloc() Message-ID: <20210507010451.SImBP81EA%akpm@linux-foundation.org> In-Reply-To: <20210506180126.03e1baee7ca52bedb6cc6003@linux-foundation.org> User-Agent: s-nail v14.8.16 Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org From: Johannes Berg Subject: gcov: use kvmalloc() Using vmalloc() in gcov is really quite wasteful, many of the objects allocated are really small (e.g. I've seen 24 bytes.) Use kvmalloc() to automatically pick the better of kmalloc() or vmalloc() depending on the size. [johannes.berg@intel.com: fix clang-11+ build] Link: https://lkml.kernel.org/r/20210412214210.6e1ecca9cdc5.I24459763acf0591d5e6b31c7e3a59890d802f79c@changeid Link: https://lkml.kernel.org/r/20210315235453.799e7a9d627d.I741d0db096c6f312910f7f1bcdfde0fda20801a4@changeid Signed-off-by: Johannes Berg Reviewed-by: Nick Desaulniers Tested-by: Nick Desaulniers Cc: Peter Oberparleiter Signed-off-by: Andrew Morton --- kernel/gcov/clang.c | 12 ++++++------ kernel/gcov/fs.c | 6 +++--- kernel/gcov/gcc_4_7.c | 6 +++--- 3 files changed, 12 insertions(+), 12 deletions(-) --- a/kernel/gcov/clang.c~gcov-use-kvmalloc +++ a/kernel/gcov/clang.c @@ -49,7 +49,7 @@ #include #include #include -#include +#include #include "gcov.h" typedef void (*llvm_gcov_callback)(void); @@ -333,8 +333,8 @@ void gcov_info_add(struct gcov_info *dst static struct gcov_fn_info *gcov_fn_info_dup(struct gcov_fn_info *fn) { size_t cv_size; /* counter values size */ - struct gcov_fn_info *fn_dup = kmemdup(fn, sizeof(*fn), - GFP_KERNEL); + struct gcov_fn_info *fn_dup = kmemdup(fn, sizeof(*fn), GFP_KERNEL); + if (!fn_dup) return NULL; INIT_LIST_HEAD(&fn_dup->head); @@ -344,7 +344,7 @@ static struct gcov_fn_info *gcov_fn_info goto err_name; cv_size = fn->num_counters * sizeof(fn->counters[0]); - fn_dup->counters = vmalloc(cv_size); + fn_dup->counters = kvmalloc(cv_size, GFP_KERNEL); if (!fn_dup->counters) goto err_counters; memcpy(fn_dup->counters, fn->counters, cv_size); @@ -368,7 +368,7 @@ static struct gcov_fn_info *gcov_fn_info INIT_LIST_HEAD(&fn_dup->head); cv_size = fn->num_counters * sizeof(fn->counters[0]); - fn_dup->counters = vmalloc(cv_size); + fn_dup->counters = kvmalloc(cv_size, GFP_KERNEL); if (!fn_dup->counters) { kfree(fn_dup); return NULL; @@ -439,7 +439,7 @@ void gcov_info_free(struct gcov_info *in struct gcov_fn_info *fn, *tmp; list_for_each_entry_safe(fn, tmp, &info->functions, head) { - vfree(fn->counters); + kvfree(fn->counters); list_del(&fn->head); kfree(fn); } --- a/kernel/gcov/fs.c~gcov-use-kvmalloc +++ a/kernel/gcov/fs.c @@ -26,7 +26,7 @@ #include #include #include -#include +#include #include "gcov.h" /** @@ -116,7 +116,7 @@ static struct gcov_iterator *gcov_iter_n /* Dry-run to get the actual buffer size. */ size = convert_to_gcda(NULL, info); - iter = vmalloc(struct_size(iter, buffer, size)); + iter = kvmalloc(struct_size(iter, buffer, size), GFP_KERNEL); if (!iter) return NULL; @@ -134,7 +134,7 @@ static struct gcov_iterator *gcov_iter_n */ static void gcov_iter_free(struct gcov_iterator *iter) { - vfree(iter); + kvfree(iter); } /** --- a/kernel/gcov/gcc_4_7.c~gcov-use-kvmalloc +++ a/kernel/gcov/gcc_4_7.c @@ -15,7 +15,7 @@ #include #include #include -#include +#include #include "gcov.h" #if (__GNUC__ >= 10) @@ -309,7 +309,7 @@ struct gcov_info *gcov_info_dup(struct g cv_size = sizeof(gcov_type) * sci_ptr->num; - dci_ptr->values = vmalloc(cv_size); + dci_ptr->values = kvmalloc(cv_size, GFP_KERNEL); if (!dci_ptr->values) goto err_free; @@ -351,7 +351,7 @@ void gcov_info_free(struct gcov_info *in ci_ptr = info->functions[fi_idx]->ctrs; for (ct_idx = 0; ct_idx < active; ct_idx++, ci_ptr++) - vfree(ci_ptr->values); + kvfree(ci_ptr->values); kfree(info->functions[fi_idx]); } _