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Subject[PATCH] hugetlbfs: correct handling of negative input to /proc/sys/vm/nr_hugepages
Date
When user insert negative value into /proc/sys/vm/nr_hugepages it will result
in the setting a random number of HugePages in system (can be easily showed
at /proc/meminfo output). This patch fixes the wrong behavior so that the
negative input will result in nr_hugepages value unchanged.

Signed-off-by: Petr Holasek <pholasek@redhat.com>
---
mm/hugetlb.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index bb0b7c1..f99d7a8 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1872,8 +1872,7 @@ static int hugetlb_sysctl_handler_common(bool obey_mempolicy,
unsigned long tmp;
int ret;

- if (!write)
- tmp = h->max_huge_pages;
+ tmp = h->max_huge_pages;

if (write && h->order >= MAX_ORDER)
return -EINVAL;
--
1.7.1


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