linux-kernel - Re: [BUG]:2.6.25-rc7 memory leak with hugepages.

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Date:	Thu, 27 Mar 2008 15:54:05 +0530
From:	Gurudas Pai <gurudas.pai@...cle.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	linux-kernel@...r.kernel.org
Subject: Re: [BUG]:2.6.25-rc7 memory leak with hugepages.



Ingo Molnar wrote:
> * Gurudas Pai <gurudas.pai@...cle.com> wrote:
> 
>> Hi,
>>
>> On 2.6.25-rc7 allocate hugepages and run a fio test with following 
>> jobfile,
> 
> could you try x86.git/latest:
> 
>   http://people.redhat.com/mingo/x86.git/README
> 
> it has a fix that could fix such a leak.
> 
> 	Ingo

Applied latest two patches and re-ran the test,

hugetlb: fix potential livelock in return_unused_surplus_hugepages()
hugetlb: indicate surplus huge page counts in per-node meminfo

Still same result,

>cat /proc/meminfo | grep Huge
HugePages_Total:  1000
HugePages_Free:    551
HugePages_Rsvd:      1
HugePages_Surp:      0
Hugepagesize:     2048 kB

>echo 0 > /proc/sys/vm/nr_hugepages
>cat /proc/meminfo | grep Huge
HugePages_Total:   450
HugePages_Free:      1
HugePages_Rsvd:      1
HugePages_Surp:    450
Hugepagesize:     2048 kB



Thanks,
-Guru
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