From 27ec26ecdca956a32e89a22a148f1c16b5c0becf Mon Sep 17 00:00:00 2001 From: Luiz Capitulino Date: Fri, 12 Dec 2014 16:55:18 -0800 Subject: [PATCH] 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 944d9fec8d7a ("hugetlb: add support for gigantic page allocation at runtime"), 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 Instead of adding arch-specifc observations to the hugepages= entry, this commit just drops the out of date information.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 Cc: Andi Kleen Acked-by: David Rientjes Cc: Rik van Riel Cc: Yasuaki Ishimatsu Cc: Yinghai Lu Cc: Davidlohr Bueso Acked-by: Naoya Horiguchi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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 eacb2e0397ae..24539d1c7d25 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 -- 2.20.1