linux-kernel - [PATCH 1/3] hugetlb: fix hugepages= entry in kernel-parameters.txt

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Date:	Wed, 12 Nov 2014 17:33:11 -0500
From:	Luiz Capitulino <lcapitulino@...hat.com>
To:	linux-mm@...ck.org
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	andi@...stfloor.org, rientjes@...gle.com, riel@...hat.com,
	isimatu.yasuaki@...fujitsu.com, yinghai@...nel.org,
	davidlohr@...com
Subject: [PATCH 1/3] hugetlb: fix hugepages= entry in kernel-parameters.txt

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hugepages= entry, this commit just drops the out of date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@...hat.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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