Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753460AbaKLWdq (ORCPT ); Wed, 12 Nov 2014 17:33:46 -0500 Received: from mx1.redhat.com ([209.132.183.28]:42812 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752862AbaKLWdo (ORCPT ); Wed, 12 Nov 2014 17:33:44 -0500 From: Luiz Capitulino To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, akpm@linux-foundation.org, andi@firstfloor.org, rientjes@google.com, riel@redhat.com, isimatu.yasuaki@jp.fujitsu.com, yinghai@kernel.org, davidlohr@hp.com Subject: [PATCH 1/3] hugetlb: fix hugepages= entry in kernel-parameters.txt Date: Wed, 12 Nov 2014 17:33:11 -0500 Message-Id: <1415831593-9020-2-git-send-email-lcapitulino@redhat.com> In-Reply-To: <1415831593-9020-1-git-send-email-lcapitulino@redhat.com> References: <1415831593-9020-1-git-send-email-lcapitulino@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The hugepages= entry in kernel-parameters.txt states that 1GB pages can only be allocated at boot time and not freed afterwards. This is not true since commit 944d9fec8d7aee, at least for x86_64. Instead of adding arch-specifc observations to the hugepages= entry, this commit just drops the out of date information. Further information about arch-specific support and available features can be obtained in the hugetlb documentation. Signed-off-by: Luiz Capitulino --- Documentation/kernel-parameters.txt | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 479f332..d919af0 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1228,9 +1228,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted. multiple times interleaved with hugepages= to reserve huge pages of different sizes. Valid pages sizes on x86-64 are 2M (when the CPU supports "pse") and 1G - (when the CPU supports the "pdpe1gb" cpuinfo flag) - Note that 1GB pages can only be allocated at boot time - using hugepages= and not freed afterwards. + (when the CPU supports the "pdpe1gb" cpuinfo flag). hvc_iucv= [S390] Number of z/VM IUCV hypervisor console (HVC) terminal devices. Valid values: 0..8 -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/