From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
To: Luiz Capitulino <lcapitulino@redhat.com>
Cc: "linux-mm@kvack.org" <linux-mm@kvack.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"andi@firstfloor.org" <andi@firstfloor.org>,
"rientjes@google.com" <rientjes@google.com>,
"riel@redhat.com" <riel@redhat.com>,
"isimatu.yasuaki@jp.fujitsu.com" <isimatu.yasuaki@jp.fujitsu.com>,
"yinghai@kernel.org" <yinghai@kernel.org>,
"davidlohr@hp.com" <davidlohr@hp.com>
Subject: Re: [PATCH 1/3] hugetlb: fix hugepages= entry in kernel-parameters.txt
Date: Mon, 17 Nov 2014 00:11:17 +0000 [thread overview]
Message-ID: <20141117001154.GA4667@hori1.linux.bs1.fc.nec.co.jp> (raw)
In-Reply-To: <1415831593-9020-2-git-send-email-lcapitulino@redhat.com>
On Wed, Nov 12, 2014 at 05:33:11PM -0500, Luiz Capitulino wrote:
> 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 hugepages= entry, this commit just drops the out of date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 <lcapitulino@redhat.com>
Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
> ---
> 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
>
> --
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next prev parent reply other threads:[~2014-11-17 0:15 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-12 22:33 [PATCH 0/3] hugetlb: misc small fixes/improvements Luiz Capitulino
2014-11-12 22:33 ` [PATCH 1/3] hugetlb: fix hugepages= entry in kernel-parameters.txt Luiz Capitulino
2014-11-17 0:11 ` Naoya Horiguchi [this message]
2014-11-19 22:39 ` David Rientjes
2014-11-12 22:33 ` [PATCH 2/3] hugetlb: alloc_bootmem_huge_page(): use IS_ALIGNED() Luiz Capitulino
2014-11-17 0:11 ` Naoya Horiguchi
2014-11-19 22:42 ` David Rientjes
2014-11-12 22:33 ` [PATCH 3/3] hugetlb: hugetlb_register_all_nodes(): add __init marker Luiz Capitulino
2014-11-17 0:12 ` Naoya Horiguchi
2014-11-19 22:43 ` David Rientjes
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