ReFS memory leak

NTDEV
1

I need a little help to determine of ReFS or the Volume Manager is
leaking memory. I have a virtual disk made of two mirrored SSDs
formatted with ReFS. I am running IoMeter to generate traffic on the
disk. At the start of the test, the disk is full, filled by IoMeter’s
test file, iobw.tst. At the start, system memory usage is 15%. As time
progresses, memory usage increases at about 1% per minute. At 41%, I
stopped and existed IoMeter and memory usage dropped to 39% and held
there. I then took the virtual disk off-line and memory usage dropped
to 15%. Next, I brought the virtual disk back on-line and memory usage
stayed at 15%.

So, if this is a memory leak in ReFS or the Volume Manager or some other
system component, how do I diagnose this?

((&->

2

Too much fun! I replaced my SSDs with two Intel SATA SSDs and
reproduced the same problem. So this confirms that this is a ReFS or
Volume Manager memory leak of some sort.

((&->

On 1/24/2013 2:01 PM, QuasiCodo wrote:

I need a little help to determine of ReFS or the Volume Manager is
leaking memory. I have a virtual disk made of two mirrored SSDs
formatted with ReFS. I am running IoMeter to generate traffic on the
disk. At the start of the test, the disk is full, filled by IoMeter’s
test file, iobw.tst. At the start, system memory usage is 15%. As time
progresses, memory usage increases at about 1% per minute. At 41%, I
stopped and existed IoMeter and memory usage dropped to 39% and held
there. I then took the virtual disk off-line and memory usage dropped
to 15%. Next, I brought the virtual disk back on-line and memory usage
stayed at 15%.

So, if this is a memory leak in ReFS or the Volume Manager or some other
system component, how do I diagnose this?

((&->

3

And what is the leaking tag?

–
Maxim S. Shatskih
Windows DDK MVP
xxxxx@storagecraft.com
http://www.storagecraft.com

“QuasiCodo” wrote in message news:xxxxx@ntdev…
> Too much fun! I replaced my SSDs with two Intel SATA SSDs and
> reproduced the same problem. So this confirms that this is a ReFS or
> Volume Manager memory leak of some sort.
>
> ((&->
>
> On 1/24/2013 2:01 PM, QuasiCodo wrote:
>> I need a little help to determine of ReFS or the Volume Manager is
>> leaking memory. I have a virtual disk made of two mirrored SSDs
>> formatted with ReFS. I am running IoMeter to generate traffic on the
>> disk. At the start of the test, the disk is full, filled by IoMeter’s
>> test file, iobw.tst. At the start, system memory usage is 15%. As time
>> progresses, memory usage increases at about 1% per minute. At 41%, I
>> stopped and existed IoMeter and memory usage dropped to 39% and held
>> there. I then took the virtual disk off-line and memory usage dropped
>> to 15%. Next, I brought the virtual disk back on-line and memory usage
>> stayed at 15%.
>>
>> So, if this is a memory leak in ReFS or the Volume Manager or some other
>> system component, how do I diagnose this?
>>
>> ((&->
>>
>>
>
>

4

On 1/27/2013 11:40 AM, Maxim S. Shatskih wrote:

And what is the leaking tag?

Poolmon shows that the total of non paged pool mem is 2.9 GB and paged
pool mem is 1.2 GB. So that leaves about 20 GB of app land memory in
use. RAMMAP shows that “Mapped File” is 22 GB (this was a different run)

((&->

5

To repeat:

Peter
OSR

6

On 1/28/2013 7:33 PM, xxxxx@osr.com wrote:

To repeat:

Peter
OSR

I sent a reply with the poolmon output attached, but the OSR server
probably rejected it.

Anyway, poolmon shows tag VIOP with 2.2 GB of mem allocated. This is
the largest and is what we expect in our driver. Altogether, there is
about 3GB of pool memory allocated, which is only 1/8th of the system
memory.

((&->

7

Ah, OK… so you’re convinced that there’s no leak then??

Peter
OSR